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AJvYcCXitgw5Mv/Dd8TqtiVquO2moxnN0z3PeNTI5vTpeDaUNWa/UWEnG/AJnRKkFva4yZIG6hR0Ia0VDL4ule2nUdj7CrbIohGXq8H7FBUv5DRo7Dyg X-Gm-Message-State: AOJu0YysX9zvVthzrerMtI1TBjcdL5WlPao004EmguLpjeWN+jkfiXkf D1AqtKIhJpUPzp6O4UAvMvFmx+g6GRSJsOAzPKYEzaPrfKK2H6CCjyTcbQAD2cyzUGsTahRjpA8 S56UtW8062g== X-Google-Smtp-Source: AGHT+IHN/eZMiyAZlahHIC9whVOJCWJW4RAdWjKjp8P6a8G/nSOK1oJiA74JGpQvN0kQ7Q6DrD+gzH5Go9UkPQ== X-Received: from joychakr.c.googlers.com ([fda3:e722:ac3:cc00:4f:4b78:c0a8:6ea]) (user=joychakr job=sendgmr) by 2002:a81:7956:0:b0:607:c633:2997 with SMTP id u83-20020a817956000000b00607c6332997mr3104320ywc.5.1708342341976; Mon, 19 Feb 2024 03:32:21 -0800 (PST) Date: Mon, 19 Feb 2024 11:31:49 +0000 In-Reply-To: <20240219113149.2437990-1-joychakr@google.com> Mime-Version: 1.0 References: <20240219113149.2437990-1-joychakr@google.com> X-Mailer: git-send-email 2.44.0.rc0.258.g7320e95886-goog Message-ID: <20240219113149.2437990-2-joychakr@google.com> Subject: [PATCH v1 1/1] nvmem: Change return type of reg read/write to ssize_t From: Joy Chakraborty To: Hector Martin , Sven Peter , Alyssa Rosenzweig , Srinivas Kandagatla , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Vladimir Zapolskiy , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Claudiu Beznea , Matthias Brugger , AngeloGioacchino Del Regno , Bjorn Andersson , Konrad Dybcio , Heiko Stuebner , Orson Zhai , Baolin Wang , Chunyan Zhang , Maxime Coquelin , Alexandre Torgue , Vincent Shih , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Rafal Milecki , Kunihiko Hayashi , Masami Hiramatsu , Michal Simek Cc: Greg Kroah-Hartman , asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, linux-sunxi@lists.linux.dev, Joy Chakraborty X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240219_033223_880924_768871B5 X-CRM114-Status: GOOD ( 27.14 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org Change return type of reg_read() and reg_write() callback to ssize_t for nvmem suppliers to return number of bytes read/written to the nvmem core. Currently nvmem core assumes the amount of data read/written is equal to what it has requested from the supplier, this return code facilitates better error handling in the nvmem core. Signed-off-by: Joy Chakraborty --- drivers/nvmem/apple-efuses.c | 5 +- drivers/nvmem/bcm-ocotp.c | 8 ++-- drivers/nvmem/brcm_nvram.c | 8 +++- drivers/nvmem/core.c | 73 +++++++++++++---------------- drivers/nvmem/imx-iim.c | 4 +- drivers/nvmem/imx-ocotp-ele.c | 4 +- drivers/nvmem/imx-ocotp-scu.c | 8 ++-- drivers/nvmem/imx-ocotp.c | 6 +-- drivers/nvmem/jz4780-efuse.c | 5 +- drivers/nvmem/lan9662-otpc.c | 8 ++-- drivers/nvmem/layerscape-sfp.c | 7 ++- drivers/nvmem/lpc18xx_eeprom.c | 10 ++-- drivers/nvmem/lpc18xx_otp.c | 4 +- drivers/nvmem/meson-efuse.c | 10 +++- drivers/nvmem/meson-mx-efuse.c | 4 +- drivers/nvmem/microchip-otpc.c | 4 +- drivers/nvmem/mtk-efuse.c | 4 +- drivers/nvmem/mxs-ocotp.c | 5 +- drivers/nvmem/nintendo-otp.c | 4 +- drivers/nvmem/qcom-spmi-sdam.c | 8 ++-- drivers/nvmem/qfprom.c | 10 ++-- drivers/nvmem/qoriq-efuse.c | 4 +- drivers/nvmem/rave-sp-eeprom.c | 12 ++--- drivers/nvmem/rmem.c | 2 +- drivers/nvmem/rockchip-efuse.c | 11 +++-- drivers/nvmem/rockchip-otp.c | 13 ++--- drivers/nvmem/sc27xx-efuse.c | 3 +- drivers/nvmem/sec-qfprom.c | 4 +- drivers/nvmem/snvs_lpgpr.c | 13 +++-- drivers/nvmem/sprd-efuse.c | 8 ++-- drivers/nvmem/stm32-bsec-optee-ta.c | 8 ++-- drivers/nvmem/stm32-bsec-optee-ta.h | 12 ++--- drivers/nvmem/stm32-romem.c | 16 +++---- drivers/nvmem/sunplus-ocotp.c | 4 +- drivers/nvmem/sunxi_sid.c | 11 +++-- drivers/nvmem/u-boot-env.c | 4 +- drivers/nvmem/uniphier-efuse.c | 4 +- drivers/nvmem/vf610-ocotp.c | 5 +- drivers/nvmem/zynqmp_nvmem.c | 2 +- include/linux/nvmem-provider.h | 4 +- 40 files changed, 180 insertions(+), 159 deletions(-) diff --git a/drivers/nvmem/apple-efuses.c b/drivers/nvmem/apple-efuses.c index d3d49d22338b..9a564cb0f26d 100644 --- a/drivers/nvmem/apple-efuses.c +++ b/drivers/nvmem/apple-efuses.c @@ -15,10 +15,11 @@ struct apple_efuses_priv { void __iomem *fuses; }; -static int apple_efuses_read(void *context, unsigned int offset, void *val, +static ssize_t apple_efuses_read(void *context, unsigned int offset, void *val, size_t bytes) { struct apple_efuses_priv *priv = context; + size_t bytes_read = bytes; u32 *dst = val; while (bytes >= sizeof(u32)) { @@ -27,7 +28,7 @@ static int apple_efuses_read(void *context, unsigned int offset, void *val, offset += sizeof(u32); } - return 0; + return bytes_read; } static int apple_efuses_probe(struct platform_device *pdev) diff --git a/drivers/nvmem/bcm-ocotp.c b/drivers/nvmem/bcm-ocotp.c index 2490f44caa40..803354574fe0 100644 --- a/drivers/nvmem/bcm-ocotp.c +++ b/drivers/nvmem/bcm-ocotp.c @@ -148,7 +148,7 @@ static int disable_ocotp_program(void __iomem *base) return ret; } -static int bcm_otpc_read(void *context, unsigned int offset, void *val, +static ssize_t bcm_otpc_read(void *context, unsigned int offset, void *val, size_t bytes) { struct otpc_priv *priv = context; @@ -176,10 +176,10 @@ static int bcm_otpc_read(void *context, unsigned int offset, void *val, reset_start_bit(priv->base); } - return 0; + return bytes_read; } -static int bcm_otpc_write(void *context, unsigned int offset, void *val, +static ssize_t bcm_otpc_write(void *context, unsigned int offset, void *val, size_t bytes) { struct otpc_priv *priv = context; @@ -214,7 +214,7 @@ static int bcm_otpc_write(void *context, unsigned int offset, void *val, disable_ocotp_program(priv->base); - return 0; + return bytes_written; } static struct nvmem_config bcm_otpc_nvmem_config = { diff --git a/drivers/nvmem/brcm_nvram.c b/drivers/nvmem/brcm_nvram.c index 5cdf339cfbec..d8700b7e2642 100644 --- a/drivers/nvmem/brcm_nvram.c +++ b/drivers/nvmem/brcm_nvram.c @@ -46,7 +46,7 @@ struct brcm_nvram_header { __le32 config_ncdl; /* ncdl values for memc */ }; -static int brcm_nvram_read(void *context, unsigned int offset, void *val, +static ssize_t brcm_nvram_read(void *context, unsigned int offset, void *val, size_t bytes) { struct brcm_nvram *priv = context; @@ -61,7 +61,11 @@ static int brcm_nvram_read(void *context, unsigned int offset, void *val, memset((uint8_t *)val + to_copy, priv->padding_byte, bytes - to_copy); - return 0; + /* + * Returning bytes requested as the whole buffer is padded even if the + * requested bytes to be read is out of bounds of resource size. + */ + return bytes; } static int brcm_nvram_copy_data(struct brcm_nvram *priv, struct platform_device *pdev) diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index eb357ac2e54a..c3ee526d9396 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -55,7 +55,7 @@ static LIST_HEAD(nvmem_lookup_list); static BLOCKING_NOTIFIER_HEAD(nvmem_notifier); -static int __nvmem_reg_read(struct nvmem_device *nvmem, unsigned int offset, +static ssize_t __nvmem_reg_read(struct nvmem_device *nvmem, unsigned int offset, void *val, size_t bytes) { if (nvmem->reg_read) @@ -64,10 +64,10 @@ static int __nvmem_reg_read(struct nvmem_device *nvmem, unsigned int offset, return -EINVAL; } -static int __nvmem_reg_write(struct nvmem_device *nvmem, unsigned int offset, +static ssize_t __nvmem_reg_write(struct nvmem_device *nvmem, unsigned int offset, void *val, size_t bytes) { - int ret; + ssize_t ret; if (nvmem->reg_write) { gpiod_set_value_cansleep(nvmem->wp_gpio, 0); @@ -79,7 +79,7 @@ static int __nvmem_reg_write(struct nvmem_device *nvmem, unsigned int offset, return -EINVAL; } -static int nvmem_access_with_keepouts(struct nvmem_device *nvmem, +static ssize_t nvmem_access_with_keepouts(struct nvmem_device *nvmem, unsigned int offset, void *val, size_t bytes, int write) { @@ -88,7 +88,7 @@ static int nvmem_access_with_keepouts(struct nvmem_device *nvmem, unsigned int kend, ksize; const struct nvmem_keepout *keepout = nvmem->keepout; const struct nvmem_keepout *keepoutend = keepout + nvmem->nkeepout; - int rc; + ssize_t rc, count = 0; /* * Skip all keepouts before the range being accessed. @@ -107,11 +107,12 @@ static int nvmem_access_with_keepouts(struct nvmem_device *nvmem, else rc = __nvmem_reg_read(nvmem, offset, val, ksize); - if (rc) + if (rc < 0) return rc; offset += ksize; val += ksize; + count += rc; } /* @@ -135,15 +136,20 @@ static int nvmem_access_with_keepouts(struct nvmem_device *nvmem, if (offset < end) { ksize = end - offset; if (write) - return __nvmem_reg_write(nvmem, offset, val, ksize); + rc = __nvmem_reg_write(nvmem, offset, val, ksize); else - return __nvmem_reg_read(nvmem, offset, val, ksize); + rc = __nvmem_reg_read(nvmem, offset, val, ksize); + + if (rc < 0) + return rc; + + count += rc; } - return 0; + return count; } -static int nvmem_reg_read(struct nvmem_device *nvmem, unsigned int offset, +static ssize_t nvmem_reg_read(struct nvmem_device *nvmem, unsigned int offset, void *val, size_t bytes) { if (!nvmem->nkeepout) @@ -152,7 +158,7 @@ static int nvmem_reg_read(struct nvmem_device *nvmem, unsigned int offset, return nvmem_access_with_keepouts(nvmem, offset, val, bytes, false); } -static int nvmem_reg_write(struct nvmem_device *nvmem, unsigned int offset, +static ssize_t nvmem_reg_write(struct nvmem_device *nvmem, unsigned int offset, void *val, size_t bytes) { if (!nvmem->nkeepout) @@ -195,7 +201,6 @@ static ssize_t bin_attr_nvmem_read(struct file *filp, struct kobject *kobj, { struct device *dev; struct nvmem_device *nvmem; - int rc; if (attr->private) dev = attr->private; @@ -221,12 +226,7 @@ static ssize_t bin_attr_nvmem_read(struct file *filp, struct kobject *kobj, if (!nvmem->reg_read) return -EPERM; - rc = nvmem_reg_read(nvmem, pos, buf, count); - - if (rc) - return rc; - - return count; + return nvmem_reg_read(nvmem, pos, buf, count); } static ssize_t bin_attr_nvmem_write(struct file *filp, struct kobject *kobj, @@ -235,7 +235,6 @@ static ssize_t bin_attr_nvmem_write(struct file *filp, struct kobject *kobj, { struct device *dev; struct nvmem_device *nvmem; - int rc; if (attr->private) dev = attr->private; @@ -261,12 +260,7 @@ static ssize_t bin_attr_nvmem_write(struct file *filp, struct kobject *kobj, if (!nvmem->reg_write) return -EPERM; - rc = nvmem_reg_write(nvmem, pos, buf, count); - - if (rc) - return rc; - - return count; + return nvmem_reg_write(nvmem, pos, buf, count); } static umode_t nvmem_bin_attr_get_umode(struct nvmem_device *nvmem) @@ -1633,9 +1627,12 @@ static int __nvmem_cell_read(struct nvmem_device *nvmem, rc = nvmem_reg_read(nvmem, cell->offset, buf, cell->raw_len); - if (rc) + if (rc < 0) return rc; + if (rc != cell->raw_len) + return -EIO; + /* shift bits in-place */ if (cell->bit_offset || cell->nbits) nvmem_shift_read_buffer_in_place(cell, buf); @@ -1708,8 +1705,11 @@ static void *nvmem_cell_prepare_write_buffer(struct nvmem_cell_entry *cell, /* setup the first byte with lsb bits from nvmem */ rc = nvmem_reg_read(nvmem, cell->offset, &v, 1); - if (rc) + if (rc < 1) { + if (rc == 0) + rc = -EIO; goto err; + } *b++ |= GENMASK(bit_offset - 1, 0) & v; /* setup rest of the byte if any */ @@ -1728,8 +1728,11 @@ static void *nvmem_cell_prepare_write_buffer(struct nvmem_cell_entry *cell, /* setup the last byte with msb bits from nvmem */ rc = nvmem_reg_read(nvmem, cell->offset + cell->bytes - 1, &v, 1); - if (rc) + if (rc < 1) { + if (rc == 0) + rc = -EIO; goto err; + } *p |= GENMASK(7, (nbits + bit_offset) % BITS_PER_BYTE) & v; } @@ -1769,10 +1772,7 @@ static int __nvmem_cell_entry_write(struct nvmem_cell_entry *cell, void *buf, si if (cell->bit_offset || cell->nbits) kfree(buf); - if (rc) - return rc; - - return len; + return rc; } /** @@ -2047,17 +2047,10 @@ int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset, size_t bytes, void *buf) { - int rc; - if (!nvmem) return -EINVAL; - rc = nvmem_reg_read(nvmem, offset, buf, bytes); - - if (rc) - return rc; - - return bytes; + return nvmem_reg_read(nvmem, offset, buf, bytes); } EXPORT_SYMBOL_GPL(nvmem_device_read); diff --git a/drivers/nvmem/imx-iim.c b/drivers/nvmem/imx-iim.c index f13bbd164086..af46c5490416 100644 --- a/drivers/nvmem/imx-iim.c +++ b/drivers/nvmem/imx-iim.c @@ -29,7 +29,7 @@ struct iim_priv { struct clk *clk; }; -static int imx_iim_read(void *context, unsigned int offset, +static ssize_t imx_iim_read(void *context, unsigned int offset, void *buf, size_t bytes) { struct iim_priv *iim = context; @@ -49,7 +49,7 @@ static int imx_iim_read(void *context, unsigned int offset, clk_disable_unprepare(iim->clk); - return 0; + return bytes; } static struct imx_iim_drvdata imx27_drvdata = { diff --git a/drivers/nvmem/imx-ocotp-ele.c b/drivers/nvmem/imx-ocotp-ele.c index cf920542f939..3025fe8aa991 100644 --- a/drivers/nvmem/imx-ocotp-ele.c +++ b/drivers/nvmem/imx-ocotp-ele.c @@ -61,7 +61,7 @@ static enum fuse_type imx_ocotp_fuse_type(void *context, u32 index) return FUSE_INVALID; } -static int imx_ocotp_reg_read(void *context, unsigned int offset, void *val, size_t bytes) +static ssize_t imx_ocotp_reg_read(void *context, unsigned int offset, void *val, size_t bytes) { struct imx_ocotp_priv *priv = context; void __iomem *reg = priv->base + priv->data->reg_off; @@ -102,7 +102,7 @@ static int imx_ocotp_reg_read(void *context, unsigned int offset, void *val, siz kfree(p); - return 0; + return bytes; }; static int imx_ele_ocotp_probe(struct platform_device *pdev) diff --git a/drivers/nvmem/imx-ocotp-scu.c b/drivers/nvmem/imx-ocotp-scu.c index 517d83e11af2..2f9b9f035c49 100644 --- a/drivers/nvmem/imx-ocotp-scu.c +++ b/drivers/nvmem/imx-ocotp-scu.c @@ -129,7 +129,7 @@ static int imx_sc_misc_otp_fuse_read(struct imx_sc_ipc *ipc, u32 word, return 0; } -static int imx_scu_ocotp_read(void *context, unsigned int offset, +static ssize_t imx_scu_ocotp_read(void *context, unsigned int offset, void *val, size_t bytes) { struct ocotp_priv *priv = context; @@ -174,10 +174,10 @@ static int imx_scu_ocotp_read(void *context, unsigned int offset, kfree(p); - return 0; + return bytes; } -static int imx_scu_ocotp_write(void *context, unsigned int offset, +static ssize_t imx_scu_ocotp_write(void *context, unsigned int offset, void *val, size_t bytes) { struct ocotp_priv *priv = context; @@ -215,7 +215,7 @@ static int imx_scu_ocotp_write(void *context, unsigned int offset, mutex_unlock(&scu_ocotp_mutex); - return res.a0; + return res.a0 < 0 ? res.a0 : bytes; } static struct nvmem_config imx_scu_ocotp_nvmem_config = { diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c index 79dd4fda0329..2b04d49c7bf0 100644 --- a/drivers/nvmem/imx-ocotp.c +++ b/drivers/nvmem/imx-ocotp.c @@ -154,7 +154,7 @@ static void imx_ocotp_clr_err_if_set(struct ocotp_priv *priv) writel(bm_ctrl_error, base + IMX_OCOTP_ADDR_CTRL_CLR); } -static int imx_ocotp_read(void *context, unsigned int offset, +static ssize_t imx_ocotp_read(void *context, unsigned int offset, void *val, size_t bytes) { struct ocotp_priv *priv = context; @@ -217,7 +217,7 @@ static int imx_ocotp_read(void *context, unsigned int offset, kfree(p); - return ret; + return ret < 0 ? ret : bytes; } static int imx_ocotp_cell_pp(void *context, const char *id, int index, @@ -307,7 +307,7 @@ static void imx_ocotp_set_imx7_timing(struct ocotp_priv *priv) writel(timing, priv->base + IMX_OCOTP_ADDR_TIMING); } -static int imx_ocotp_write(void *context, unsigned int offset, void *val, +static ssize_t imx_ocotp_write(void *context, unsigned int offset, void *val, size_t bytes) { struct ocotp_priv *priv = context; diff --git a/drivers/nvmem/jz4780-efuse.c b/drivers/nvmem/jz4780-efuse.c index 0b01b840edd9..3c3f57dd1ffc 100644 --- a/drivers/nvmem/jz4780-efuse.c +++ b/drivers/nvmem/jz4780-efuse.c @@ -66,10 +66,11 @@ struct jz4780_efuse { }; /* main entry point */ -static int jz4780_efuse_read(void *context, unsigned int offset, +static ssize_t jz4780_efuse_read(void *context, unsigned int offset, void *val, size_t bytes) { struct jz4780_efuse *efuse = context; + size_t bytes_read = bytes; while (bytes > 0) { size_t start = offset & ~(JZ_EFU_READ_SIZE - 1); @@ -112,7 +113,7 @@ static int jz4780_efuse_read(void *context, unsigned int offset, bytes -= chunk; } - return 0; + return bytes_read; } static struct nvmem_config jz4780_efuse_nvmem_config = { diff --git a/drivers/nvmem/lan9662-otpc.c b/drivers/nvmem/lan9662-otpc.c index 56fc19f092a7..a6bdc79867c7 100644 --- a/drivers/nvmem/lan9662-otpc.c +++ b/drivers/nvmem/lan9662-otpc.c @@ -119,7 +119,7 @@ static int lan9662_otp_write_byte(struct lan9662_otp *otp, u32 offset, u8 data) return rc; } -static int lan9662_otp_read(void *context, unsigned int offset, +static ssize_t lan9662_otp_read(void *context, unsigned int offset, void *_val, size_t bytes) { struct lan9662_otp *otp = context; @@ -136,10 +136,10 @@ static int lan9662_otp_read(void *context, unsigned int offset, } lan9662_otp_power(otp, false); - return rc; + return rc < 0 ? rc : bytes; } -static int lan9662_otp_write(void *context, unsigned int offset, +static ssize_t lan9662_otp_write(void *context, unsigned int offset, void *_val, size_t bytes) { struct lan9662_otp *otp = context; @@ -167,7 +167,7 @@ static int lan9662_otp_write(void *context, unsigned int offset, } lan9662_otp_power(otp, false); - return rc; + return rc < 0 ? rc : bytes; } static struct nvmem_config otp_config = { diff --git a/drivers/nvmem/layerscape-sfp.c b/drivers/nvmem/layerscape-sfp.c index e2b424561949..0aab245abd6e 100644 --- a/drivers/nvmem/layerscape-sfp.c +++ b/drivers/nvmem/layerscape-sfp.c @@ -26,14 +26,17 @@ struct layerscape_sfp_data { enum regmap_endian endian; }; -static int layerscape_sfp_read(void *context, unsigned int offset, void *val, +static ssize_t layerscape_sfp_read(void *context, unsigned int offset, void *val, size_t bytes) { struct layerscape_sfp_priv *priv = context; + int ret; - return regmap_bulk_read(priv->regmap, + ret = regmap_bulk_read(priv->regmap, LAYERSCAPE_SFP_OTP_OFFSET + offset, val, bytes / 4); + + return ret < 0 ? ret : bytes; } static struct nvmem_config layerscape_sfp_nvmem_config = { diff --git a/drivers/nvmem/lpc18xx_eeprom.c b/drivers/nvmem/lpc18xx_eeprom.c index a0275b29afd5..cc8f59c2cd63 100644 --- a/drivers/nvmem/lpc18xx_eeprom.c +++ b/drivers/nvmem/lpc18xx_eeprom.c @@ -87,10 +87,11 @@ static int lpc18xx_eeprom_busywait_until_prog(struct lpc18xx_eeprom_dev *eeprom) return -ETIMEDOUT; } -static int lpc18xx_eeprom_gather_write(void *context, unsigned int reg, +static ssize_t lpc18xx_eeprom_gather_write(void *context, unsigned int reg, void *val, size_t bytes) { struct lpc18xx_eeprom_dev *eeprom = context; + size_t bytes_written = bytes; unsigned int offset = reg; int ret; @@ -123,13 +124,14 @@ static int lpc18xx_eeprom_gather_write(void *context, unsigned int reg, lpc18xx_eeprom_writel(eeprom, LPC18XX_EEPROM_PWRDWN, LPC18XX_EEPROM_PWRDWN_YES); - return 0; + return bytes_written; } -static int lpc18xx_eeprom_read(void *context, unsigned int offset, +static ssize_t lpc18xx_eeprom_read(void *context, unsigned int offset, void *val, size_t bytes) { struct lpc18xx_eeprom_dev *eeprom = context; + size_t bytes_read = bytes; lpc18xx_eeprom_writel(eeprom, LPC18XX_EEPROM_PWRDWN, LPC18XX_EEPROM_PWRDWN_NO); @@ -147,7 +149,7 @@ static int lpc18xx_eeprom_read(void *context, unsigned int offset, lpc18xx_eeprom_writel(eeprom, LPC18XX_EEPROM_PWRDWN, LPC18XX_EEPROM_PWRDWN_YES); - return 0; + return bytes_read; } diff --git a/drivers/nvmem/lpc18xx_otp.c b/drivers/nvmem/lpc18xx_otp.c index adc9948e7b2e..da7d7667e10c 100644 --- a/drivers/nvmem/lpc18xx_otp.c +++ b/drivers/nvmem/lpc18xx_otp.c @@ -37,7 +37,7 @@ struct lpc18xx_otp { void __iomem *base; }; -static int lpc18xx_otp_read(void *context, unsigned int offset, +static ssize_t lpc18xx_otp_read(void *context, unsigned int offset, void *val, size_t bytes) { struct lpc18xx_otp *otp = context; @@ -52,7 +52,7 @@ static int lpc18xx_otp_read(void *context, unsigned int offset, for (i = index; i < (index + count); i++) *buf++ = readl(otp->base + i * LPC18XX_OTP_WORD_SIZE); - return 0; + return bytes; } static struct nvmem_config lpc18xx_otp_nvmem_config = { diff --git a/drivers/nvmem/meson-efuse.c b/drivers/nvmem/meson-efuse.c index b922df99f9bc..da2e856b16a1 100644 --- a/drivers/nvmem/meson-efuse.c +++ b/drivers/nvmem/meson-efuse.c @@ -18,18 +18,24 @@ static int meson_efuse_read(void *context, unsigned int offset, void *val, size_t bytes) { struct meson_sm_firmware *fw = context; + int ret; - return meson_sm_call_read(fw, (u8 *)val, bytes, SM_EFUSE_READ, offset, + ret = meson_sm_call_read(fw, (u8 *)val, bytes, SM_EFUSE_READ, offset, bytes, 0, 0, 0); + + return ret < 0 ? ret : bytes; } static int meson_efuse_write(void *context, unsigned int offset, void *val, size_t bytes) { struct meson_sm_firmware *fw = context; + int ret; - return meson_sm_call_write(fw, (u8 *)val, bytes, SM_EFUSE_WRITE, offset, + ret = meson_sm_call_write(fw, (u8 *)val, bytes, SM_EFUSE_WRITE, offset, bytes, 0, 0, 0); + + return ret < 0 ? ret : bytes; } static const struct of_device_id meson_efuse_match[] = { diff --git a/drivers/nvmem/meson-mx-efuse.c b/drivers/nvmem/meson-mx-efuse.c index 3ff04d5ca8f8..fdc598adfe9e 100644 --- a/drivers/nvmem/meson-mx-efuse.c +++ b/drivers/nvmem/meson-mx-efuse.c @@ -132,7 +132,7 @@ static int meson_mx_efuse_read_addr(struct meson_mx_efuse *efuse, return 0; } -static int meson_mx_efuse_read(void *context, unsigned int offset, +static ssize_t meson_mx_efuse_read(void *context, unsigned int offset, void *buf, size_t bytes) { struct meson_mx_efuse *efuse = context; @@ -163,7 +163,7 @@ static int meson_mx_efuse_read(void *context, unsigned int offset, meson_mx_efuse_hw_disable(efuse); - return err; + return err < 0 ? err : bytes; } static const struct meson_mx_efuse_platform_data meson6_efuse_data = { diff --git a/drivers/nvmem/microchip-otpc.c b/drivers/nvmem/microchip-otpc.c index 7cf81738a3e0..9b53fcb75e98 100644 --- a/drivers/nvmem/microchip-otpc.c +++ b/drivers/nvmem/microchip-otpc.c @@ -143,7 +143,7 @@ static int mchp_otpc_prepare_read(struct mchp_otpc *otpc, * packet. The user will have to be aware of the memory footprint before doing * the read request. */ -static int mchp_otpc_read(void *priv, unsigned int off, void *val, +static ssize_t mchp_otpc_read(void *priv, unsigned int off, void *val, size_t bytes) { struct mchp_otpc *otpc = priv; @@ -187,7 +187,7 @@ static int mchp_otpc_read(void *priv, unsigned int off, void *val, } while (payload_size >= 0 && len < bytes); } - return 0; + return len; } static int mchp_otpc_init_packets_list(struct mchp_otpc *otpc, u32 *size) diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c index 84f05b40a411..3819d416b505 100644 --- a/drivers/nvmem/mtk-efuse.c +++ b/drivers/nvmem/mtk-efuse.c @@ -20,7 +20,7 @@ struct mtk_efuse_priv { void __iomem *base; }; -static int mtk_reg_read(void *context, +static ssize_t mtk_reg_read(void *context, unsigned int reg, void *_val, size_t bytes) { struct mtk_efuse_priv *priv = context; @@ -31,7 +31,7 @@ static int mtk_reg_read(void *context, for (i = 0; i < bytes; i++, val++) *val = readb(addr + i); - return 0; + return bytes; } static int mtk_efuse_gpu_speedbin_pp(void *context, const char *id, int index, diff --git a/drivers/nvmem/mxs-ocotp.c b/drivers/nvmem/mxs-ocotp.c index 7b78f18f9545..ddf7394de71b 100644 --- a/drivers/nvmem/mxs-ocotp.c +++ b/drivers/nvmem/mxs-ocotp.c @@ -56,10 +56,11 @@ static int mxs_ocotp_wait(struct mxs_ocotp *otp) return 0; } -static int mxs_ocotp_read(void *context, unsigned int offset, +static ssize_t mxs_ocotp_read(void *context, unsigned int offset, void *val, size_t bytes) { struct mxs_ocotp *otp = context; + size_t bytes_read = bytes; u32 *buf = val; int ret; @@ -102,7 +103,7 @@ static int mxs_ocotp_read(void *context, unsigned int offset, disable_clk: clk_disable(otp->clk); - return ret; + return ret < 0 ? ret : bytes_read; } static struct nvmem_config ocotp_config = { diff --git a/drivers/nvmem/nintendo-otp.c b/drivers/nvmem/nintendo-otp.c index 355e7f1fc6d5..880f2915c030 100644 --- a/drivers/nvmem/nintendo-otp.c +++ b/drivers/nvmem/nintendo-otp.c @@ -45,7 +45,7 @@ static const struct nintendo_otp_devtype_data latte_otp_data = { .num_banks = 8, }; -static int nintendo_otp_reg_read(void *context, +static ssize_t nintendo_otp_reg_read(void *context, unsigned int reg, void *_val, size_t bytes) { struct nintendo_otp_priv *priv = context; @@ -61,7 +61,7 @@ static int nintendo_otp_reg_read(void *context, reg += WORD_SIZE; } - return 0; + return bytes; } static const struct of_device_id nintendo_otp_of_table[] = { diff --git a/drivers/nvmem/qcom-spmi-sdam.c b/drivers/nvmem/qcom-spmi-sdam.c index 9aa8f42faa4c..c4dfde372794 100644 --- a/drivers/nvmem/qcom-spmi-sdam.c +++ b/drivers/nvmem/qcom-spmi-sdam.c @@ -60,7 +60,7 @@ static bool sdam_is_ro(unsigned int offset, size_t len) return false; } -static int sdam_read(void *priv, unsigned int offset, void *val, +static ssize_t sdam_read(void *priv, unsigned int offset, void *val, size_t bytes) { struct sdam_chip *sdam = priv; @@ -78,10 +78,10 @@ static int sdam_read(void *priv, unsigned int offset, void *val, dev_err(dev, "Failed to read SDAM offset %#x len=%zd, rc=%d\n", offset, bytes, rc); - return rc; + return rc < 0 ? rc : bytes; } -static int sdam_write(void *priv, unsigned int offset, void *val, +static ssize_t sdam_write(void *priv, unsigned int offset, void *val, size_t bytes) { struct sdam_chip *sdam = priv; @@ -105,7 +105,7 @@ static int sdam_write(void *priv, unsigned int offset, void *val, dev_err(dev, "Failed to write SDAM offset %#x len=%zd, rc=%d\n", offset, bytes, rc); - return rc; + return rc < 0 ? rc : bytes; } static int sdam_probe(struct platform_device *pdev) diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c index 116a39e804c7..4d571ae6ba3e 100644 --- a/drivers/nvmem/qfprom.c +++ b/drivers/nvmem/qfprom.c @@ -251,9 +251,9 @@ static int qfprom_enable_fuse_blowing(const struct qfprom_priv *priv, * * Writes to fuses. WARNING: THIS IS PERMANENT. * - * Return: 0 or -err. + * Return: bytes written or -err. */ -static int qfprom_reg_write(void *context, unsigned int reg, void *_val, +static ssize_t qfprom_reg_write(void *context, unsigned int reg, void *_val, size_t bytes) { struct qfprom_priv *priv = context; @@ -314,10 +314,10 @@ static int qfprom_reg_write(void *context, unsigned int reg, void *_val, exit_enabled_fuse_blowing: qfprom_disable_fuse_blowing(priv, &old); - return ret; + return ret < 0 ? ret : bytes; } -static int qfprom_reg_read(void *context, +static ssize_t qfprom_reg_read(void *context, unsigned int reg, void *_val, size_t bytes) { struct qfprom_priv *priv = context; @@ -331,7 +331,7 @@ static int qfprom_reg_read(void *context, while (words--) *val++ = readb(base + reg + i++); - return 0; + return bytes; } static void qfprom_runtime_disable(void *data) diff --git a/drivers/nvmem/qoriq-efuse.c b/drivers/nvmem/qoriq-efuse.c index e7fd04d6dd94..1e7315953e44 100644 --- a/drivers/nvmem/qoriq-efuse.c +++ b/drivers/nvmem/qoriq-efuse.c @@ -14,7 +14,7 @@ struct qoriq_efuse_priv { void __iomem *base; }; -static int qoriq_efuse_read(void *context, unsigned int offset, void *val, +static ssize_t qoriq_efuse_read(void *context, unsigned int offset, void *val, size_t bytes) { struct qoriq_efuse_priv *priv = context; @@ -24,7 +24,7 @@ static int qoriq_efuse_read(void *context, unsigned int offset, void *val, /* Ignore trailing bytes (there shouldn't be any) */ - return 0; + return bytes; } static int qoriq_efuse_probe(struct platform_device *pdev) diff --git a/drivers/nvmem/rave-sp-eeprom.c b/drivers/nvmem/rave-sp-eeprom.c index 9ecf3873cbb7..6c8aecde8311 100644 --- a/drivers/nvmem/rave-sp-eeprom.c +++ b/drivers/nvmem/rave-sp-eeprom.c @@ -214,10 +214,10 @@ rave_sp_eeprom_page_access(struct rave_sp_eeprom *eeprom, * arbitrary offset (not necessary page aligned) of arbitrary length * (is not constrained by EEPROM page size). * - * Returns zero in case of success or negative error code in case of - * failure. + * Returns number of bytes in case of success or negative error code + * in case of failure. */ -static int rave_sp_eeprom_access(struct rave_sp_eeprom *eeprom, +static ssize_t rave_sp_eeprom_access(struct rave_sp_eeprom *eeprom, enum rave_sp_eeprom_access_type type, unsigned int offset, u8 *data, unsigned int data_len) @@ -267,17 +267,17 @@ static int rave_sp_eeprom_access(struct rave_sp_eeprom *eeprom, } while (residue); out: mutex_unlock(&eeprom->mutex); - return ret; + return ret < 0 ? ret : data_len; } -static int rave_sp_eeprom_reg_read(void *eeprom, unsigned int offset, +static ssize_t rave_sp_eeprom_reg_read(void *eeprom, unsigned int offset, void *val, size_t bytes) { return rave_sp_eeprom_access(eeprom, RAVE_SP_EEPROM_READ, offset, val, bytes); } -static int rave_sp_eeprom_reg_write(void *eeprom, unsigned int offset, +static ssize_t rave_sp_eeprom_reg_write(void *eeprom, unsigned int offset, void *val, size_t bytes) { return rave_sp_eeprom_access(eeprom, RAVE_SP_EEPROM_WRITE, diff --git a/drivers/nvmem/rmem.c b/drivers/nvmem/rmem.c index 752d0bf4445e..1ddb832cd178 100644 --- a/drivers/nvmem/rmem.c +++ b/drivers/nvmem/rmem.c @@ -17,7 +17,7 @@ struct rmem { phys_addr_t size; }; -static int rmem_read(void *context, unsigned int offset, +static ssize_t rmem_read(void *context, unsigned int offset, void *val, size_t bytes) { struct rmem *priv = context; diff --git a/drivers/nvmem/rockchip-efuse.c b/drivers/nvmem/rockchip-efuse.c index 2b40978ddb18..fe05d7afd281 100644 --- a/drivers/nvmem/rockchip-efuse.c +++ b/drivers/nvmem/rockchip-efuse.c @@ -52,7 +52,7 @@ struct rockchip_efuse_chip { struct clk *clk; }; -static int rockchip_rk3288_efuse_read(void *context, unsigned int offset, +static ssize_t rockchip_rk3288_efuse_read(void *context, unsigned int offset, void *val, size_t bytes) { struct rockchip_efuse_chip *efuse = context; @@ -65,6 +65,7 @@ static int rockchip_rk3288_efuse_read(void *context, unsigned int offset, return ret; } + ret = bytes; writel(RK3288_LOAD | RK3288_PGENB, efuse->base + REG_EFUSE_CTRL); udelay(1); while (bytes--) { @@ -89,7 +90,7 @@ static int rockchip_rk3288_efuse_read(void *context, unsigned int offset, clk_disable_unprepare(efuse->clk); - return 0; + return ret; } static int rockchip_rk3328_efuse_read(void *context, unsigned int offset, @@ -144,10 +145,10 @@ static int rockchip_rk3328_efuse_read(void *context, unsigned int offset, nomem: clk_disable_unprepare(efuse->clk); - return ret; + return ret < 0 ? ret : bytes; } -static int rockchip_rk3399_efuse_read(void *context, unsigned int offset, +static ssize_t rockchip_rk3399_efuse_read(void *context, unsigned int offset, void *val, size_t bytes) { struct rockchip_efuse_chip *efuse = context; @@ -200,7 +201,7 @@ static int rockchip_rk3399_efuse_read(void *context, unsigned int offset, clk_disable_unprepare(efuse->clk); - return 0; + return bytes; } static struct nvmem_config econfig = { diff --git a/drivers/nvmem/rockchip-otp.c b/drivers/nvmem/rockchip-otp.c index cb9aa5428350..f7eb1feea978 100644 --- a/drivers/nvmem/rockchip-otp.c +++ b/drivers/nvmem/rockchip-otp.c @@ -144,10 +144,11 @@ static int rockchip_otp_ecc_enable(struct rockchip_otp *otp, bool enable) return ret; } -static int px30_otp_read(void *context, unsigned int offset, +static ssize_t px30_otp_read(void *context, unsigned int offset, void *val, size_t bytes) { struct rockchip_otp *otp = context; + size_t bytes_read = bytes; u8 *buf = val; int ret; @@ -181,10 +182,10 @@ static int px30_otp_read(void *context, unsigned int offset, read_end: writel(0x0 | OTPC_USE_USER_MASK, otp->base + OTPC_USER_CTRL); - return ret; + return ret < 0 ? ret : bytes_read; } -static int rk3588_otp_read(void *context, unsigned int offset, +static ssize_t rk3588_otp_read(void *context, unsigned int offset, void *val, size_t bytes) { struct rockchip_otp *otp = context; @@ -227,10 +228,10 @@ static int rk3588_otp_read(void *context, unsigned int offset, read_end: kfree(buf); - return ret; + return ret < 0 ? ret : bytes; } -static int rockchip_otp_read(void *context, unsigned int offset, +static ssize_t rockchip_otp_read(void *context, unsigned int offset, void *val, size_t bytes) { struct rockchip_otp *otp = context; @@ -249,7 +250,7 @@ static int rockchip_otp_read(void *context, unsigned int offset, clk_bulk_disable_unprepare(otp->data->num_clks, otp->clks); - return ret; + return ret < 0 ? ret : bytes; } static struct nvmem_config otp_config = { diff --git a/drivers/nvmem/sc27xx-efuse.c b/drivers/nvmem/sc27xx-efuse.c index bff27011f4ff..309ba1306939 100644 --- a/drivers/nvmem/sc27xx-efuse.c +++ b/drivers/nvmem/sc27xx-efuse.c @@ -121,7 +121,7 @@ static int sc27xx_efuse_poll_status(struct sc27xx_efuse *efuse, u32 bits) return 0; } -static int sc27xx_efuse_read(void *context, u32 offset, void *val, size_t bytes) +static ssize_t sc27xx_efuse_read(void *context, u32 offset, void *val, size_t bytes) { struct sc27xx_efuse *efuse = context; u32 buf, blk_index = offset / SC27XX_EFUSE_BLOCK_WIDTH; @@ -194,6 +194,7 @@ static int sc27xx_efuse_read(void *context, u32 offset, void *val, size_t bytes) if (!ret) { buf >>= blk_offset; memcpy(val, &buf, bytes); + ret = bytes; } return ret; diff --git a/drivers/nvmem/sec-qfprom.c b/drivers/nvmem/sec-qfprom.c index 19799b3fe00a..dbacaab519e7 100644 --- a/drivers/nvmem/sec-qfprom.c +++ b/drivers/nvmem/sec-qfprom.c @@ -20,7 +20,7 @@ struct sec_qfprom { struct device *dev; }; -static int sec_qfprom_reg_read(void *context, unsigned int reg, void *_val, size_t bytes) +static ssize_t sec_qfprom_reg_read(void *context, unsigned int reg, void *_val, size_t bytes) { struct sec_qfprom *priv = context; unsigned int i; @@ -40,7 +40,7 @@ static int sec_qfprom_reg_read(void *context, unsigned int reg, void *_val, size val[i] = tmp[reg & 3]; } - return 0; + return bytes; } static int sec_qfprom_probe(struct platform_device *pdev) diff --git a/drivers/nvmem/snvs_lpgpr.c b/drivers/nvmem/snvs_lpgpr.c index 89c27112320f..3019bf0c6271 100644 --- a/drivers/nvmem/snvs_lpgpr.c +++ b/drivers/nvmem/snvs_lpgpr.c @@ -50,7 +50,7 @@ static const struct snvs_lpgpr_cfg snvs_lpgpr_cfg_imx7d = { .size = 16, }; -static int snvs_lpgpr_write(void *context, unsigned int offset, void *val, +static ssize_t snvs_lpgpr_write(void *context, unsigned int offset, void *val, size_t bytes) { struct snvs_lpgpr_priv *priv = context; @@ -72,18 +72,23 @@ static int snvs_lpgpr_write(void *context, unsigned int offset, void *val, if (lock_reg & IMX_GPR_HL) return -EPERM; - return regmap_bulk_write(priv->regmap, dcfg->offset + offset, val, + ret = regmap_bulk_write(priv->regmap, dcfg->offset + offset, val, bytes / 4); + + return ret < 0 ? ret : bytes; } -static int snvs_lpgpr_read(void *context, unsigned int offset, void *val, +static ssize_t snvs_lpgpr_read(void *context, unsigned int offset, void *val, size_t bytes) { struct snvs_lpgpr_priv *priv = context; const struct snvs_lpgpr_cfg *dcfg = priv->dcfg; + int ret; - return regmap_bulk_read(priv->regmap, dcfg->offset + offset, + ret = regmap_bulk_read(priv->regmap, dcfg->offset + offset, val, bytes / 4); + + return ret < 0 ? ret : bytes; } static int snvs_lpgpr_probe(struct platform_device *pdev) diff --git a/drivers/nvmem/sprd-efuse.c b/drivers/nvmem/sprd-efuse.c index bb3105f3291f..5a1581df7555 100644 --- a/drivers/nvmem/sprd-efuse.c +++ b/drivers/nvmem/sprd-efuse.c @@ -291,7 +291,7 @@ static int sprd_efuse_raw_read(struct sprd_efuse *efuse, int blk, u32 *val, return 0; } -static int sprd_efuse_read(void *context, u32 offset, void *val, size_t bytes) +static ssize_t sprd_efuse_read(void *context, u32 offset, void *val, size_t bytes) { struct sprd_efuse *efuse = context; bool blk_double = efuse->data->blk_double; @@ -318,10 +318,10 @@ static int sprd_efuse_read(void *context, u32 offset, void *val, size_t bytes) unlock: sprd_efuse_unlock(efuse); - return ret; + return ret < 0 ? ret : bytes; } -static int sprd_efuse_write(void *context, u32 offset, void *val, size_t bytes) +static ssize_t sprd_efuse_write(void *context, u32 offset, void *val, size_t bytes) { struct sprd_efuse *efuse = context; bool blk_double = efuse->data->blk_double; @@ -355,7 +355,7 @@ static int sprd_efuse_write(void *context, u32 offset, void *val, size_t bytes) unlock: sprd_efuse_unlock(efuse); - return ret; + return ret < 0 ? ret : bytes; } static int sprd_efuse_probe(struct platform_device *pdev) diff --git a/drivers/nvmem/stm32-bsec-optee-ta.c b/drivers/nvmem/stm32-bsec-optee-ta.c index f89ce791dd12..059f13af0886 100644 --- a/drivers/nvmem/stm32-bsec-optee-ta.c +++ b/drivers/nvmem/stm32-bsec-optee-ta.c @@ -136,7 +136,7 @@ void stm32_bsec_optee_ta_close(void *ctx) } /* stm32_bsec_optee_ta_read() - nvmem read access using PTA client driver */ -int stm32_bsec_optee_ta_read(struct tee_context *ctx, unsigned int offset, +ssize_t stm32_bsec_optee_ta_read(struct tee_context *ctx, unsigned int offset, void *buf, size_t bytes) { struct tee_shm *shm; @@ -198,11 +198,11 @@ int stm32_bsec_optee_ta_read(struct tee_context *ctx, unsigned int offset, out_tee_session: stm32_bsec_ta_close_session(ctx, session_id); - return ret; + return ret < 0 ? ret : bytes; } /* stm32_bsec_optee_ta_write() - nvmem write access using PTA client driver */ -int stm32_bsec_optee_ta_write(struct tee_context *ctx, unsigned int lower, +ssize_t stm32_bsec_optee_ta_write(struct tee_context *ctx, unsigned int lower, unsigned int offset, void *buf, size_t bytes) { struct tee_shm *shm; struct tee_ioctl_invoke_arg arg; @@ -294,5 +294,5 @@ int stm32_bsec_optee_ta_write(struct tee_context *ctx, unsigned int lower, out_tee_session: stm32_bsec_ta_close_session(ctx, session_id); - return ret; + return ret < 0 ? ret : bytes; } diff --git a/drivers/nvmem/stm32-bsec-optee-ta.h b/drivers/nvmem/stm32-bsec-optee-ta.h index 3966a0535179..799f9f915150 100644 --- a/drivers/nvmem/stm32-bsec-optee-ta.h +++ b/drivers/nvmem/stm32-bsec-optee-ta.h @@ -33,9 +33,9 @@ void stm32_bsec_optee_ta_close(void *ctx); * @bytes: number of bytes to read * * Return: - * On success, 0. On failure, -errno. + * On success, bytes read. On failure, -errno. */ -int stm32_bsec_optee_ta_read(struct tee_context *ctx, unsigned int offset, +ssize_t stm32_bsec_optee_ta_read(struct tee_context *ctx, unsigned int offset, void *buf, size_t bytes); /** @@ -47,9 +47,9 @@ int stm32_bsec_optee_ta_read(struct tee_context *ctx, unsigned int offset, * @bytes: number of bytes to write * * Return: - * On success, 0. On failure, -errno. + * On success, bytes written. On failure, -errno. */ -int stm32_bsec_optee_ta_write(struct tee_context *ctx, unsigned int lower, +ssize_t stm32_bsec_optee_ta_write(struct tee_context *ctx, unsigned int lower, unsigned int offset, void *buf, size_t bytes); #else @@ -63,14 +63,14 @@ static inline void stm32_bsec_optee_ta_close(void *ctx) { } -static inline int stm32_bsec_optee_ta_read(struct tee_context *ctx, +static inline ssize_t stm32_bsec_optee_ta_read(struct tee_context *ctx, unsigned int offset, void *buf, size_t bytes) { return -EOPNOTSUPP; } -static inline int stm32_bsec_optee_ta_write(struct tee_context *ctx, +static inline ssize_t stm32_bsec_optee_ta_write(struct tee_context *ctx, unsigned int lower, unsigned int offset, void *buf, size_t bytes) diff --git a/drivers/nvmem/stm32-romem.c b/drivers/nvmem/stm32-romem.c index 82879b1c9eb9..a8c6983f9139 100644 --- a/drivers/nvmem/stm32-romem.c +++ b/drivers/nvmem/stm32-romem.c @@ -40,7 +40,7 @@ struct stm32_romem_priv { struct tee_context *ctx; }; -static int stm32_romem_read(void *context, unsigned int offset, void *buf, +static ssize_t stm32_romem_read(void *context, unsigned int offset, void *buf, size_t bytes) { struct stm32_romem_priv *priv = context; @@ -50,7 +50,7 @@ static int stm32_romem_read(void *context, unsigned int offset, void *buf, for (i = offset; i < offset + bytes; i++) *buf8++ = readb_relaxed(priv->base + i); - return 0; + return bytes; } static int stm32_bsec_smc(u8 op, u32 otp, u32 data, u32 *result) @@ -71,7 +71,7 @@ static int stm32_bsec_smc(u8 op, u32 otp, u32 data, u32 *result) #endif } -static int stm32_bsec_read(void *context, unsigned int offset, void *buf, +static ssize_t stm32_bsec_read(void *context, unsigned int offset, void *buf, size_t bytes) { struct stm32_romem_priv *priv = context; @@ -115,10 +115,10 @@ static int stm32_bsec_read(void *context, unsigned int offset, void *buf, skip_bytes = 0; } - return 0; + return bytes; } -static int stm32_bsec_write(void *context, unsigned int offset, void *buf, +static ssize_t stm32_bsec_write(void *context, unsigned int offset, void *buf, size_t bytes) { struct stm32_romem_priv *priv = context; @@ -142,10 +142,10 @@ static int stm32_bsec_write(void *context, unsigned int offset, void *buf, if (offset + bytes >= priv->lower * 4) dev_warn(dev, "Update of upper OTPs with ECC protection (word programming, only once)\n"); - return 0; + return bytes; } -static int stm32_bsec_pta_read(void *context, unsigned int offset, void *buf, +static ssize_t stm32_bsec_pta_read(void *context, unsigned int offset, void *buf, size_t bytes) { struct stm32_romem_priv *priv = context; @@ -153,7 +153,7 @@ static int stm32_bsec_pta_read(void *context, unsigned int offset, void *buf, return stm32_bsec_optee_ta_read(priv->ctx, offset, buf, bytes); } -static int stm32_bsec_pta_write(void *context, unsigned int offset, void *buf, +static ssize_t stm32_bsec_pta_write(void *context, unsigned int offset, void *buf, size_t bytes) { struct stm32_romem_priv *priv = context; diff --git a/drivers/nvmem/sunplus-ocotp.c b/drivers/nvmem/sunplus-ocotp.c index 38f5d9df39cd..7bda128bb93e 100644 --- a/drivers/nvmem/sunplus-ocotp.c +++ b/drivers/nvmem/sunplus-ocotp.c @@ -114,7 +114,7 @@ static int sp_otp_read_real(struct sp_ocotp_priv *otp, int addr, char *value) return ret; } -static int sp_ocotp_read(void *priv, unsigned int offset, void *value, size_t bytes) +static ssize_t sp_ocotp_read(void *priv, unsigned int offset, void *value, size_t bytes) { struct sp_ocotp_priv *otp = priv; unsigned int addr; @@ -140,7 +140,7 @@ static int sp_ocotp_read(void *priv, unsigned int offset, void *value, size_t by disable_clk: clk_disable(otp->clk); - return ret; + return ret < 0 ? ret : bytes; } static struct nvmem_config sp_ocotp_nvmem_config = { diff --git a/drivers/nvmem/sunxi_sid.c b/drivers/nvmem/sunxi_sid.c index ba14a76208ab..26580c7a3c6d 100644 --- a/drivers/nvmem/sunxi_sid.c +++ b/drivers/nvmem/sunxi_sid.c @@ -36,7 +36,7 @@ struct sunxi_sid { u32 value_offset; }; -static int sunxi_sid_read(void *context, unsigned int offset, +static ssize_t sunxi_sid_read(void *context, unsigned int offset, void *val, size_t bytes) { struct sunxi_sid *sid = context; @@ -56,7 +56,7 @@ static int sunxi_sid_read(void *context, unsigned int offset, word = readl_relaxed(sid->base + sid->value_offset + offset); memcpy(val, &word, bytes); - return 0; + return bytes; } static int sun8i_sid_register_readout(const struct sunxi_sid *sid, @@ -90,10 +90,11 @@ static int sun8i_sid_register_readout(const struct sunxi_sid *sid, * to be not reliable at all. * Read by the registers instead. */ -static int sun8i_sid_read_by_reg(void *context, unsigned int offset, +static ssize_t sun8i_sid_read_by_reg(void *context, unsigned int offset, void *val, size_t bytes) { struct sunxi_sid *sid = context; + size_t bytes_read = bytes; u32 word; int ret; @@ -109,7 +110,7 @@ static int sun8i_sid_read_by_reg(void *context, unsigned int offset, } if (!bytes) - return 0; + return bytes_read; /* Handle any trailing bytes */ ret = sun8i_sid_register_readout(sid, offset, &word); @@ -118,7 +119,7 @@ static int sun8i_sid_read_by_reg(void *context, unsigned int offset, memcpy(val, &word, bytes); - return 0; + return bytes_read; } static int sunxi_sid_probe(struct platform_device *pdev) diff --git a/drivers/nvmem/u-boot-env.c b/drivers/nvmem/u-boot-env.c index befbab156cda..a3cf63dfac2a 100644 --- a/drivers/nvmem/u-boot-env.c +++ b/drivers/nvmem/u-boot-env.c @@ -47,7 +47,7 @@ struct u_boot_env_image_broadcom { DECLARE_FLEX_ARRAY(uint8_t, data); } __packed; -static int u_boot_env_read(void *context, unsigned int offset, void *val, +static ssize_t u_boot_env_read(void *context, unsigned int offset, void *val, size_t bytes) { struct u_boot_env *priv = context; @@ -66,7 +66,7 @@ static int u_boot_env_read(void *context, unsigned int offset, void *val, return -EIO; } - return 0; + return bytes_read; } static int u_boot_env_read_post_process_ethaddr(void *context, const char *id, int index, diff --git a/drivers/nvmem/uniphier-efuse.c b/drivers/nvmem/uniphier-efuse.c index 6ad3295d3195..728c9af9fbe4 100644 --- a/drivers/nvmem/uniphier-efuse.c +++ b/drivers/nvmem/uniphier-efuse.c @@ -16,7 +16,7 @@ struct uniphier_efuse_priv { void __iomem *base; }; -static int uniphier_reg_read(void *context, +static ssize_t uniphier_reg_read(void *context, unsigned int reg, void *_val, size_t bytes) { struct uniphier_efuse_priv *priv = context; @@ -26,7 +26,7 @@ static int uniphier_reg_read(void *context, for (offs = 0; offs < bytes; offs += sizeof(u8)) *val++ = readb(priv->base + reg + offs); - return 0; + return bytes; } static int uniphier_efuse_probe(struct platform_device *pdev) diff --git a/drivers/nvmem/vf610-ocotp.c b/drivers/nvmem/vf610-ocotp.c index ee9c61ae727d..0ed91de61950 100644 --- a/drivers/nvmem/vf610-ocotp.c +++ b/drivers/nvmem/vf610-ocotp.c @@ -143,11 +143,12 @@ static int vf610_get_fuse_address(int base_addr_offset) return -EINVAL; } -static int vf610_ocotp_read(void *context, unsigned int offset, +static ssize_t vf610_ocotp_read(void *context, unsigned int offset, void *val, size_t bytes) { struct vf610_ocotp *ocotp = context; void __iomem *base = ocotp->base; + size_t bytes_read = bytes; u32 reg, *buf = val; int fuse_addr; int ret; @@ -193,7 +194,7 @@ static int vf610_ocotp_read(void *context, unsigned int offset, offset += 4; } - return 0; + return bytes_read; } static struct nvmem_config ocotp_config = { diff --git a/drivers/nvmem/zynqmp_nvmem.c b/drivers/nvmem/zynqmp_nvmem.c index 7f15aa89a9d0..50f8497cc17a 100644 --- a/drivers/nvmem/zynqmp_nvmem.c +++ b/drivers/nvmem/zynqmp_nvmem.c @@ -30,7 +30,7 @@ static int zynqmp_nvmem_read(void *context, unsigned int offset, dev_dbg(priv->dev, "Read chipid val %x %x\n", idcode, version); *(int *)val = version & SILICON_REVISION_MASK; - return 0; + return bytes; } static struct nvmem_config econfig = { diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h index f0ba0e03218f..2cdab3fec2be 100644 --- a/include/linux/nvmem-provider.h +++ b/include/linux/nvmem-provider.h @@ -16,9 +16,9 @@ #include struct nvmem_device; -typedef int (*nvmem_reg_read_t)(void *priv, unsigned int offset, +typedef ssize_t (*nvmem_reg_read_t)(void *priv, unsigned int offset, void *val, size_t bytes); -typedef int (*nvmem_reg_write_t)(void *priv, unsigned int offset, +typedef ssize_t (*nvmem_reg_write_t)(void *priv, unsigned int offset, void *val, size_t bytes); /* used for vendor specific post processing of cell data */ typedef int (*nvmem_cell_post_process_t)(void *priv, const char *id, int index,