From: Nishanth Menon <nm@ti.com> To: Joel Fernandes <joelf@ti.com>, Herbert Xu <herbert@gondor.apana.org.au>, "David S. Miller" <davem@davemloft.net> Cc: <linux-crypto@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-omap@vger.kernel.org>, Joachim Eastwood <manabian@gmail.com>, <balbi@ti.com>, Nishanth Menon <nm@ti.com> Subject: [PATCH V2] crypto: omap-des - handle error of pm_runtime_get_sync Date: Tue, 15 Apr 2014 11:58:31 -0500 [thread overview] Message-ID: <1397581111-21148-1-git-send-email-nm@ti.com> (raw) In-Reply-To: <534D61DF.9090203@ti.com> pm_runtime_get_sync may not always succeed depending on SoC involved. So handle the error appropriately ensuring usage_count is accurate in case of failure. Signed-off-by: Nishanth Menon <nm@ti.com> --- V2: - review fixes, print function names in error log as well. V1: https://patchwork.kernel.org/patch/3993861/ drivers/crypto/omap-des.c | 26 +++++++++++++++++++++++--- 1 file changed, 23 insertions(+), 3 deletions(-) diff --git a/drivers/crypto/omap-des.c b/drivers/crypto/omap-des.c index ec5f131..1d570c4 100644 --- a/drivers/crypto/omap-des.c +++ b/drivers/crypto/omap-des.c @@ -223,12 +223,19 @@ static void omap_des_write_n(struct omap_des_dev *dd, u32 offset, static int omap_des_hw_init(struct omap_des_dev *dd) { + int err; + /* * clocks are enabled when request starts and disabled when finished. * It may be long delays between requests. * Device might go to off mode to save power. */ - pm_runtime_get_sync(dd->dev); + err = pm_runtime_get_sync(dd->dev); + if (err < 0) { + pm_runtime_put_noidle(dd->dev); + dev_err(dd->dev, "%s: failed to get_sync(%d)\n", __func__, err); + return err; + } if (!(dd->flags & FLAGS_INIT)) { dd->flags |= FLAGS_INIT; @@ -1083,7 +1090,12 @@ static int omap_des_probe(struct platform_device *pdev) dd->phys_base = res->start; pm_runtime_enable(dev); - pm_runtime_get_sync(dev); + err = pm_runtime_get_sync(dev); + if (err < 0) { + pm_runtime_put_noidle(dev); + dev_err(dd->dev, "%s: failed to get_sync(%d)\n", __func__, err); + goto err_get; + } omap_des_dma_stop(dd); @@ -1148,6 +1160,7 @@ err_algs: err_irq: tasklet_kill(&dd->done_task); tasklet_kill(&dd->queue_task); +err_get: pm_runtime_disable(dev); err_res: dd = NULL; @@ -1191,7 +1204,14 @@ static int omap_des_suspend(struct device *dev) static int omap_des_resume(struct device *dev) { - pm_runtime_get_sync(dev); + int err; + + err = pm_runtime_get_sync(dev); + if (err < 0) { + pm_runtime_put_noidle(dev); + dev_err(dev, "%s: failed to get_sync(%d)\n", __func__, err); + return err; + } return 0; } #endif -- 1.7.9.5
WARNING: multiple messages have this Message-ID (diff)
From: Nishanth Menon <nm@ti.com> To: Joel Fernandes <joelf@ti.com>, Herbert Xu <herbert@gondor.apana.org.au>, "David S. Miller" <davem@davemloft.net> Cc: linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, Joachim Eastwood <manabian@gmail.com>, balbi@ti.com, Nishanth Menon <nm@ti.com> Subject: [PATCH V2] crypto: omap-des - handle error of pm_runtime_get_sync Date: Tue, 15 Apr 2014 11:58:31 -0500 [thread overview] Message-ID: <1397581111-21148-1-git-send-email-nm@ti.com> (raw) In-Reply-To: <534D61DF.9090203@ti.com> pm_runtime_get_sync may not always succeed depending on SoC involved. So handle the error appropriately ensuring usage_count is accurate in case of failure. Signed-off-by: Nishanth Menon <nm@ti.com> --- V2: - review fixes, print function names in error log as well. V1: https://patchwork.kernel.org/patch/3993861/ drivers/crypto/omap-des.c | 26 +++++++++++++++++++++++--- 1 file changed, 23 insertions(+), 3 deletions(-) diff --git a/drivers/crypto/omap-des.c b/drivers/crypto/omap-des.c index ec5f131..1d570c4 100644 --- a/drivers/crypto/omap-des.c +++ b/drivers/crypto/omap-des.c @@ -223,12 +223,19 @@ static void omap_des_write_n(struct omap_des_dev *dd, u32 offset, static int omap_des_hw_init(struct omap_des_dev *dd) { + int err; + /* * clocks are enabled when request starts and disabled when finished. * It may be long delays between requests. * Device might go to off mode to save power. */ - pm_runtime_get_sync(dd->dev); + err = pm_runtime_get_sync(dd->dev); + if (err < 0) { + pm_runtime_put_noidle(dd->dev); + dev_err(dd->dev, "%s: failed to get_sync(%d)\n", __func__, err); + return err; + } if (!(dd->flags & FLAGS_INIT)) { dd->flags |= FLAGS_INIT; @@ -1083,7 +1090,12 @@ static int omap_des_probe(struct platform_device *pdev) dd->phys_base = res->start; pm_runtime_enable(dev); - pm_runtime_get_sync(dev); + err = pm_runtime_get_sync(dev); + if (err < 0) { + pm_runtime_put_noidle(dev); + dev_err(dd->dev, "%s: failed to get_sync(%d)\n", __func__, err); + goto err_get; + } omap_des_dma_stop(dd); @@ -1148,6 +1160,7 @@ err_algs: err_irq: tasklet_kill(&dd->done_task); tasklet_kill(&dd->queue_task); +err_get: pm_runtime_disable(dev); err_res: dd = NULL; @@ -1191,7 +1204,14 @@ static int omap_des_suspend(struct device *dev) static int omap_des_resume(struct device *dev) { - pm_runtime_get_sync(dev); + int err; + + err = pm_runtime_get_sync(dev); + if (err < 0) { + pm_runtime_put_noidle(dev); + dev_err(dev, "%s: failed to get_sync(%d)\n", __func__, err); + return err; + } return 0; } #endif -- 1.7.9.5
next prev parent reply other threads:[~2014-04-15 16:58 UTC|newest] Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-04-15 15:33 [PATCH] crypto: omap-des - handle error of pm_runtime_get_sync Nishanth Menon 2014-04-15 15:33 ` Nishanth Menon 2014-04-15 15:50 ` Felipe Balbi 2014-04-15 15:50 ` Felipe Balbi 2014-04-15 16:44 ` Nishanth Menon 2014-04-15 16:44 ` Nishanth Menon 2014-04-15 16:58 ` Nishanth Menon [this message] 2014-04-15 16:58 ` [PATCH V2] " Nishanth Menon 2014-04-15 17:05 ` Felipe Balbi 2014-04-15 17:05 ` Felipe Balbi 2014-04-15 17:06 ` Joachim Eastwood 2014-04-15 17:18 ` Nishanth Menon 2014-04-15 17:18 ` Nishanth Menon 2014-04-15 17:51 ` Joel Fernandes 2014-04-15 17:51 ` Joel Fernandes 2014-04-16 13:50 ` Herbert Xu
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