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[122.107.196.14]) by smtp.gmail.com with ESMTPSA id u16-20020a170903125000b001690d398401sm3530730plh.88.2022.07.15.05.48.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Jul 2022 05:48:14 -0700 (PDT) From: Daniil Lunev To: Adrian Hunter Cc: Daniil Lunev , Avri Altman , Bart Van Assche , Bean Huo , "James E.J. Bottomley" , "Martin K. Petersen" , linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org Subject: [PATCH] scsi: ufs: ufs-pci: Correct check for RESET DSM Date: Fri, 15 Jul 2022 22:48:07 +1000 Message-Id: <20220715224722.1.I22460c4f4a9ccf2c96c3f9bb392b409926d80b2f@changeid> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org dsm_fns is a bitmap, and it is 0-indexed according to the check in __intel_dsm funciton. But common initialization was checking it as if it was 1-indexed. The CL corrects the discrepancy. This change won't break any existing calls to the function, since before the change both bits 0 and 1 were checked and needed to be set. Signed-off-by: Daniil Lunev --- drivers/ufs/host/ufshcd-pci.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/ufs/host/ufshcd-pci.c b/drivers/ufs/host/ufshcd-pci.c index 04166bda41daa..e54a49e64acad 100644 --- a/drivers/ufs/host/ufshcd-pci.c +++ b/drivers/ufs/host/ufshcd-pci.c @@ -20,6 +20,12 @@ #include #include +#define __INTEL_DSM_SUPPORTED(host, fn) \ + ((fn) < 32 && (fn) >= 0 && ((host)->dsm_fns & (1 << (fn)))) + +#define INTEL_DSM_SUPPORTED(host, name) \ + __INTEL_DSM_SUPPORTED(host, INTEL_DSM_##name) + struct ufs_host { void (*late_init)(struct ufs_hba *hba); }; @@ -71,7 +77,7 @@ static int __intel_dsm(struct intel_host *intel_host, struct device *dev, static int intel_dsm(struct intel_host *intel_host, struct device *dev, unsigned int fn, u32 *result) { - if (fn > 31 || !(intel_host->dsm_fns & (1 << fn))) + if (!__INTEL_DSM_SUPPORTED(intel_host, fn)) return -EOPNOTSUPP; return __intel_dsm(intel_host, dev, fn, result); @@ -300,7 +306,7 @@ static int ufs_intel_device_reset(struct ufs_hba *hba) { struct intel_host *host = ufshcd_get_variant(hba); - if (host->dsm_fns & INTEL_DSM_RESET) { + if (INTEL_DSM_SUPPORTED(host, RESET)) { u32 result = 0; int err; @@ -342,7 +348,7 @@ static int ufs_intel_common_init(struct ufs_hba *hba) return -ENOMEM; ufshcd_set_variant(hba, host); intel_dsm_init(host, hba->dev); - if (host->dsm_fns & INTEL_DSM_RESET) { + if (INTEL_DSM_SUPPORTED(host, RESET)) { if (hba->vops->device_reset) hba->caps |= UFSHCD_CAP_DEEPSLEEP; } else {