From patchwork Wed Sep 5 08:49:36 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 10588603 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D5E3313AC for ; Wed, 5 Sep 2018 09:23:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DA0A329B76 for ; Wed, 5 Sep 2018 09:23:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CDF5A29C06; Wed, 5 Sep 2018 09:23:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2E83529B76 for ; Wed, 5 Sep 2018 09:23:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728176AbeIENwt (ORCPT ); Wed, 5 Sep 2018 09:52:49 -0400 Received: from xavier.telenet-ops.be ([195.130.132.52]:58254 "EHLO xavier.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727809AbeIENwt (ORCPT ); Wed, 5 Sep 2018 09:52:49 -0400 Received: from ramsan.of.borg ([84.194.111.163]) by xavier.telenet-ops.be with bizsmtp id XlPU1y00R3XaVaC01lPUyG; Wed, 05 Sep 2018 11:23:29 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtp (Exim 4.86_2) (envelope-from ) id 1fxU24-0006p3-LE; Wed, 05 Sep 2018 11:23:28 +0200 Received: from geert by rox.of.borg with local (Exim 4.90_1) (envelope-from ) id 1fxTVO-0001wY-Bv; Wed, 05 Sep 2018 10:49:42 +0200 From: Geert Uytterhoeven To: Mark Brown Cc: Gaku Inami , Hiromitsu Yamasaki , linux-spi@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-sh@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 1/4] spi: sh-msiof: Fix invalid SPI use during system suspend Date: Wed, 5 Sep 2018 10:49:36 +0200 Message-Id: <20180905084939.7401-2-geert+renesas@glider.be> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180905084939.7401-1-geert+renesas@glider.be> References: <20180905084939.7401-1-geert+renesas@glider.be> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Gaku Inami If the SPI queue is running during system suspend, the system may lock up. Fix this by stopping/restarting the queue during system suspend/resume by calling spi_master_suspend()/spi_master_resume() from the PM callbacks. In-kernel users will receive an -ESHUTDOWN error while system suspend/resume is in progress. Signed-off-by: Gaku Inami Signed-off-by: Hiromitsu Yamasaki [geert: Cleanup, reword] Signed-off-by: Geert Uytterhoeven --- drivers/spi/spi-sh-msiof.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index 539d6d1a277a6179..bfe4e6d4f7bff66c 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -1426,12 +1426,37 @@ static const struct platform_device_id spi_driver_ids[] = { }; MODULE_DEVICE_TABLE(platform, spi_driver_ids); +#ifdef CONFIG_PM_SLEEP +static int sh_msiof_spi_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct sh_msiof_spi_priv *p = platform_get_drvdata(pdev); + + return spi_master_suspend(p->master); +} + +static int sh_msiof_spi_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct sh_msiof_spi_priv *p = platform_get_drvdata(pdev); + + return spi_master_resume(p->master); +} + +static SIMPLE_DEV_PM_OPS(sh_msiof_spi_pm_ops, sh_msiof_spi_suspend, + sh_msiof_spi_resume); +#define DEV_PM_OPS &sh_msiof_spi_pm_ops +#else +#define DEV_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ + static struct platform_driver sh_msiof_spi_drv = { .probe = sh_msiof_spi_probe, .remove = sh_msiof_spi_remove, .id_table = spi_driver_ids, .driver = { .name = "spi_sh_msiof", + .pm = DEV_PM_OPS, .of_match_table = of_match_ptr(sh_msiof_match), }, }; From patchwork Wed Sep 5 08:49:37 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 10588597 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 30D1F14E0 for ; Wed, 5 Sep 2018 09:23:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3452629C1B for ; Wed, 5 Sep 2018 09:23:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 28D0C29C09; Wed, 5 Sep 2018 09:23:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7A69629BF9 for ; Wed, 5 Sep 2018 09:23:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728096AbeIENwt (ORCPT ); Wed, 5 Sep 2018 09:52:49 -0400 Received: from andre.telenet-ops.be ([195.130.132.53]:55174 "EHLO andre.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728108AbeIENwt (ORCPT ); Wed, 5 Sep 2018 09:52:49 -0400 Received: from ramsan.of.borg ([84.194.111.163]) by andre.telenet-ops.be with bizsmtp id XlPU1y00V3XaVaC01lPUz1; Wed, 05 Sep 2018 11:23:29 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtp (Exim 4.86_2) (envelope-from ) id 1fxU24-0006p3-NT; Wed, 05 Sep 2018 11:23:28 +0200 Received: from geert by rox.of.borg with local (Exim 4.90_1) (envelope-from ) id 1fxTVO-0001wa-Co; Wed, 05 Sep 2018 10:49:42 +0200 From: Geert Uytterhoeven To: Mark Brown Cc: Gaku Inami , Hiromitsu Yamasaki , linux-spi@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-sh@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 2/4] spi: sh-msiof: Fix handling of write value for SISTR register Date: Wed, 5 Sep 2018 10:49:37 +0200 Message-Id: <20180905084939.7401-3-geert+renesas@glider.be> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180905084939.7401-1-geert+renesas@glider.be> References: <20180905084939.7401-1-geert+renesas@glider.be> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Hiromitsu Yamasaki This patch changes writing to the SISTR register according to the H/W user's manual. The TDREQ bit and RDREQ bits of SISTR are read-only, and must be written their initial values of zero. Signed-off-by: Hiromitsu Yamasaki [geert: reword] Signed-off-by: Geert Uytterhoeven --- drivers/spi/spi-sh-msiof.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index bfe4e6d4f7bff66c..101cd6aae2ea520a 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -397,7 +397,8 @@ static void sh_msiof_spi_set_mode_regs(struct sh_msiof_spi_priv *p, static void sh_msiof_reset_str(struct sh_msiof_spi_priv *p) { - sh_msiof_write(p, STR, sh_msiof_read(p, STR)); + sh_msiof_write(p, STR, + sh_msiof_read(p, STR) & ~(STR_TDREQ | STR_RDREQ)); } static void sh_msiof_spi_write_fifo_8(struct sh_msiof_spi_priv *p, From patchwork Wed Sep 5 08:49:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 10588609 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7556013AC for ; Wed, 5 Sep 2018 09:23:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 77DE529B76 for ; Wed, 5 Sep 2018 09:23:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6B83529BF8; Wed, 5 Sep 2018 09:23:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 19A4829B76 for ; Wed, 5 Sep 2018 09:23:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728096AbeIENxD (ORCPT ); Wed, 5 Sep 2018 09:53:03 -0400 Received: from andre.telenet-ops.be ([195.130.132.53]:55168 "EHLO andre.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727870AbeIENwu (ORCPT ); Wed, 5 Sep 2018 09:52:50 -0400 Received: from ramsan.of.borg ([84.194.111.163]) by andre.telenet-ops.be with bizsmtp id XlPU1y00F3XaVaC01lPUyv; Wed, 05 Sep 2018 11:23:29 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtp (Exim 4.86_2) (envelope-from ) id 1fxU24-0006p3-9w; Wed, 05 Sep 2018 11:23:28 +0200 Received: from geert by rox.of.borg with local (Exim 4.90_1) (envelope-from ) id 1fxTVO-0001wd-DV; Wed, 05 Sep 2018 10:49:42 +0200 From: Geert Uytterhoeven To: Mark Brown Cc: Gaku Inami , Hiromitsu Yamasaki , linux-spi@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-sh@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 3/4] spi: rspi: Fix invalid SPI use during system suspend Date: Wed, 5 Sep 2018 10:49:38 +0200 Message-Id: <20180905084939.7401-4-geert+renesas@glider.be> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180905084939.7401-1-geert+renesas@glider.be> References: <20180905084939.7401-1-geert+renesas@glider.be> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP If the SPI queue is running during system suspend, the system may lock up. Fix this by stopping/restarting the queue during system suspend/resume, by calling spi_master_suspend()/spi_master_resume() from the PM callbacks. In-kernel users will receive an -ESHUTDOWN error while system suspend/resume is in progress. Based on a patch for sh-msiof by Gaku Inami. Signed-off-by: Geert Uytterhoeven --- drivers/spi/spi-rspi.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index d710954b45954ca9..45faa390747b1166 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -1348,12 +1348,36 @@ static const struct platform_device_id spi_driver_ids[] = { MODULE_DEVICE_TABLE(platform, spi_driver_ids); +#ifdef CONFIG_PM_SLEEP +static int rspi_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rspi_data *rspi = platform_get_drvdata(pdev); + + return spi_master_suspend(rspi->master); +} + +static int rspi_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rspi_data *rspi = platform_get_drvdata(pdev); + + return spi_master_resume(rspi->master); +} + +static SIMPLE_DEV_PM_OPS(rspi_pm_ops, rspi_suspend, rspi_resume); +#define DEV_PM_OPS &rspi_pm_ops +#else +#define DEV_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ + static struct platform_driver rspi_driver = { .probe = rspi_probe, .remove = rspi_remove, .id_table = spi_driver_ids, .driver = { .name = "renesas_spi", + .pm = DEV_PM_OPS, .of_match_table = of_match_ptr(rspi_of_match), }, }; From patchwork Wed Sep 5 08:49:39 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 10588599 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 49C1D180E for ; Wed, 5 Sep 2018 09:23:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4D8D829BC4 for ; Wed, 5 Sep 2018 09:23:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 41D7629C84; Wed, 5 Sep 2018 09:23:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CF17C29C06 for ; Wed, 5 Sep 2018 09:23:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728135AbeIENwt (ORCPT ); Wed, 5 Sep 2018 09:52:49 -0400 Received: from albert.telenet-ops.be ([195.130.137.90]:39258 "EHLO albert.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728172AbeIENwt (ORCPT ); Wed, 5 Sep 2018 09:52:49 -0400 Received: from ramsan.of.borg ([84.194.111.163]) by albert.telenet-ops.be with bizsmtp id XlPU1y00e3XaVaC06lPUaQ; Wed, 05 Sep 2018 11:23:29 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtp (Exim 4.86_2) (envelope-from ) id 1fxU24-0006p3-MR; Wed, 05 Sep 2018 11:23:28 +0200 Received: from geert by rox.of.borg with local (Exim 4.90_1) (envelope-from ) id 1fxTVO-0001wg-F1; Wed, 05 Sep 2018 10:49:42 +0200 From: Geert Uytterhoeven To: Mark Brown Cc: Gaku Inami , Hiromitsu Yamasaki , linux-spi@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-sh@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 4/4] spi: rspi: Fix interrupted DMA transfers Date: Wed, 5 Sep 2018 10:49:39 +0200 Message-Id: <20180905084939.7401-5-geert+renesas@glider.be> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180905084939.7401-1-geert+renesas@glider.be> References: <20180905084939.7401-1-geert+renesas@glider.be> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When interrupted, wait_event_interruptible_timeout() returns -ERESTARTSYS, and the SPI transfer in progress will fail, as expected: m25p80 spi0.0: SPI transfer failed: -512 spi_master spi0: failed to transfer one message from queue However, as the underlying DMA transfers may not have completed, all subsequent SPI transfers may start to fail: spi_master spi0: receive timeout qspi_transfer_out_in() returned -110 m25p80 spi0.0: SPI transfer failed: -110 spi_master spi0: failed to transfer one message from queue Fix this by calling dmaengine_terminate_all() not only for timeouts, but also for errors. This can be reproduced on r8a7991/koelsch, using "hd /dev/mtd0" followed by CTRL-C. Signed-off-by: Geert Uytterhoeven --- drivers/spi/spi-rspi.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 45faa390747b1166..98a839d286b8e82b 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -598,11 +598,13 @@ static int rspi_dma_transfer(struct rspi_data *rspi, struct sg_table *tx, ret = wait_event_interruptible_timeout(rspi->wait, rspi->dma_callbacked, HZ); - if (ret > 0 && rspi->dma_callbacked) + if (ret > 0 && rspi->dma_callbacked) { ret = 0; - else if (!ret) { - dev_err(&rspi->master->dev, "DMA timeout\n"); - ret = -ETIMEDOUT; + } else { + if (!ret) { + dev_err(&rspi->master->dev, "DMA timeout\n"); + ret = -ETIMEDOUT; + } if (tx) dmaengine_terminate_all(rspi->master->dma_tx); if (rx)