From: Sylwester Nawrocki <snawrocki@kernel.org> To: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Krzysztof Kozlowski <krzk@kernel.org>, Mauro Carvalho Chehab <mchehab@kernel.org>, Sylwester Nawrocki <s.nawrocki@samsung.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-samsung-soc@vger.kernel.org Subject: Re: [PATCH 57/78] media: exynos4-is: use pm_runtime_resume_and_get() Date: Tue, 27 Apr 2021 10:06:31 +0200 [thread overview] Message-ID: <1a98b4b7-78c2-810d-a4ba-762c1a9576b3@kernel.org> (raw) In-Reply-To: <20210426151224.2b677d1b@coco.lan> On 26.04.2021 15:12, Mauro Carvalho Chehab wrote: > Em Sun, 25 Apr 2021 22:57:25 +0200 > Sylwester Nawrocki <snawrocki@kernel.org> escreveu: > >> On 24.04.2021 08:45, Mauro Carvalho Chehab wrote: >>> Commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter") >>> added pm_runtime_resume_and_get() in order to automatically handle >>> dev->power.usage_count decrement on errors. >>> >>> Use the new API, in order to cleanup the error check logic. >>> >>> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> >>> diff --git a/drivers/media/platform/exynos4-is/fimc-is.c b/drivers/media/platform/exynos4-is/fimc-is.c >>> index 972d9601d236..bca35866cc74 100644 >>> --- a/drivers/media/platform/exynos4-is/fimc-is.c >>> +++ b/drivers/media/platform/exynos4-is/fimc-is.c >>> @@ -828,7 +828,7 @@ static int fimc_is_probe(struct platform_device *pdev) >>> goto err_irq; >>> } >>> >>> - ret = pm_runtime_get_sync(dev); >>> + ret = pm_runtime_resume_and_get(dev); >>> if (ret < 0) >>> goto err_pm; >> >> It seems you intended to use err_suspend label here. We don't need >> a new label though, instead of err_pm we can jump to err_irq when >> pm_runtime_resume_and_get() fails. > > Thanks! Will fix at the next version. > >> Note that when runtime PM is >> disabled pm_runtime_resume_and_get() always returns 0. > > Ok, but there are a couple of conditions at rpm_resume() function > at drivers/base/power/runtime.c (which is the code that actually > handles those PM macros) that could make it to return errors, > which are independent on the PM callbacks, like those: > > if (dev->power.runtime_error) > retval = -EINVAL; > else if (dev->power.disable_depth > 0) > retval = -EACCES; > > and more might be added as the PM core changes. Right, I looked only at !CONFIG_PM case, this is what the "if (!pm_runtime_enabled(dev))" test and explicit fimc_is_runtime_{resume,suspend} calls were originally for. Agreed, better not to rely too much on internal implementation as there is no specific guarantees about return value at the API documentation. Regards, Sylwester >>> @@ -862,6 +862,7 @@ static int fimc_is_probe(struct platform_device *pdev) >>> fimc_is_unregister_subdevs(is); >>> err_pm: >>> pm_runtime_put_noidle(dev); >>> +err_suspend: >>> if (!pm_runtime_enabled(dev)) >>> fimc_is_runtime_suspend(dev); >>> err_irq: >>
WARNING: multiple messages have this Message-ID (diff)
From: Sylwester Nawrocki <snawrocki@kernel.org> To: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Krzysztof Kozlowski <krzk@kernel.org>, Mauro Carvalho Chehab <mchehab@kernel.org>, Sylwester Nawrocki <s.nawrocki@samsung.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-samsung-soc@vger.kernel.org Subject: Re: [PATCH 57/78] media: exynos4-is: use pm_runtime_resume_and_get() Date: Tue, 27 Apr 2021 10:06:31 +0200 [thread overview] Message-ID: <1a98b4b7-78c2-810d-a4ba-762c1a9576b3@kernel.org> (raw) In-Reply-To: <20210426151224.2b677d1b@coco.lan> On 26.04.2021 15:12, Mauro Carvalho Chehab wrote: > Em Sun, 25 Apr 2021 22:57:25 +0200 > Sylwester Nawrocki <snawrocki@kernel.org> escreveu: > >> On 24.04.2021 08:45, Mauro Carvalho Chehab wrote: >>> Commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter") >>> added pm_runtime_resume_and_get() in order to automatically handle >>> dev->power.usage_count decrement on errors. >>> >>> Use the new API, in order to cleanup the error check logic. >>> >>> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> >>> diff --git a/drivers/media/platform/exynos4-is/fimc-is.c b/drivers/media/platform/exynos4-is/fimc-is.c >>> index 972d9601d236..bca35866cc74 100644 >>> --- a/drivers/media/platform/exynos4-is/fimc-is.c >>> +++ b/drivers/media/platform/exynos4-is/fimc-is.c >>> @@ -828,7 +828,7 @@ static int fimc_is_probe(struct platform_device *pdev) >>> goto err_irq; >>> } >>> >>> - ret = pm_runtime_get_sync(dev); >>> + ret = pm_runtime_resume_and_get(dev); >>> if (ret < 0) >>> goto err_pm; >> >> It seems you intended to use err_suspend label here. We don't need >> a new label though, instead of err_pm we can jump to err_irq when >> pm_runtime_resume_and_get() fails. > > Thanks! Will fix at the next version. > >> Note that when runtime PM is >> disabled pm_runtime_resume_and_get() always returns 0. > > Ok, but there are a couple of conditions at rpm_resume() function > at drivers/base/power/runtime.c (which is the code that actually > handles those PM macros) that could make it to return errors, > which are independent on the PM callbacks, like those: > > if (dev->power.runtime_error) > retval = -EINVAL; > else if (dev->power.disable_depth > 0) > retval = -EACCES; > > and more might be added as the PM core changes. Right, I looked only at !CONFIG_PM case, this is what the "if (!pm_runtime_enabled(dev))" test and explicit fimc_is_runtime_{resume,suspend} calls were originally for. Agreed, better not to rely too much on internal implementation as there is no specific guarantees about return value at the API documentation. Regards, Sylwester >>> @@ -862,6 +862,7 @@ static int fimc_is_probe(struct platform_device *pdev) >>> fimc_is_unregister_subdevs(is); >>> err_pm: >>> pm_runtime_put_noidle(dev); >>> +err_suspend: >>> if (!pm_runtime_enabled(dev)) >>> fimc_is_runtime_suspend(dev); >>> err_irq: >> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-04-27 8:06 UTC|newest] Thread overview: 197+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-24 6:44 [PATCH 00/78] media: use pm_runtime_resume_and_get() instead of pm_runtime_get_sync() Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 01/78] media: atmel: properly get pm_runtime Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 9:36 ` kernel test robot 2021-04-24 9:36 ` kernel test robot 2021-04-24 9:36 ` kernel test robot 2021-04-24 6:44 ` [PATCH 02/78] media: marvel-ccic: fix some issues when getting pm_runtime Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 03/78] media: mdk-mdp: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 04/78] media: rcar_fdp1: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 05/78] media: mdk-mdp: " Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 18:23 ` Ezequiel Garcia 2021-04-24 18:23 ` Ezequiel Garcia 2021-04-24 18:23 ` Ezequiel Garcia 2021-04-24 6:44 ` [PATCH 06/78] media: renesas-ceu: " Mauro Carvalho Chehab 2021-04-24 8:11 ` Jacopo Mondi 2021-04-24 6:44 ` [PATCH 07/78] media: s5p: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 08/78] media: am437x:: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 09/78] media: sh_vou: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 10/78] media: sti/hva: use pm_runtime_resume_and_get() Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 11/78] staging: media: rkvdec: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 23:20 ` Ezequiel Garcia 2021-04-24 23:20 ` Ezequiel Garcia 2021-04-24 23:20 ` Ezequiel Garcia 2021-04-24 6:44 ` [PATCH 12/78] staging: media: atomisp_fops: use pm_runtime_resume_and_get() Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 13/78] staging: media: hantro_drv: " Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 23:23 ` Ezequiel Garcia 2021-04-24 23:23 ` Ezequiel Garcia 2021-04-24 23:23 ` Ezequiel Garcia 2021-04-26 12:33 ` Mauro Carvalho Chehab 2021-04-26 12:33 ` Mauro Carvalho Chehab 2021-04-26 12:33 ` Mauro Carvalho Chehab 2021-04-26 12:42 ` Mauro Carvalho Chehab 2021-04-26 12:42 ` Mauro Carvalho Chehab 2021-04-26 12:42 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 14/78] staging: media: imx7-mipi-csis: " Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-26 10:11 ` Rui Miguel Silva 2021-04-26 10:11 ` Rui Miguel Silva 2021-04-26 10:11 ` Rui Miguel Silva 2021-04-24 6:44 ` [PATCH 15/78] staging: media: ipu3: " Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 16/78] staging: media: cedrus_video: " Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 17/78] staging: media: vde: " Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 7:35 ` Dmitry Osipenko 2021-04-24 7:35 ` Dmitry Osipenko 2021-04-27 9:22 ` Mauro Carvalho Chehab 2021-04-27 9:22 ` Mauro Carvalho Chehab 2021-04-27 12:34 ` Johan Hovold 2021-04-27 12:34 ` Johan Hovold 2021-04-24 6:44 ` [PATCH 18/78] staging: media: csi: " Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 19/78] staging: media: vi: " Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 20/78] media: mtk-vcodec: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 21/78] media: s5p-jpeg: " Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-27 9:14 ` Sylwester Nawrocki 2021-04-27 9:14 ` Sylwester Nawrocki 2021-04-24 6:44 ` [PATCH 22/78] media: delta-v4l2: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 23/78] media: sun8i_rotate: " Mauro Carvalho Chehab 2021-04-24 6:44 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 24/78] media: i2c: ak7375: use pm_runtime_resume_and_get() Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 25/78] media: i2c: ccs-core: " Mauro Carvalho Chehab 2021-04-25 18:55 ` Sakari Ailus 2021-04-26 14:01 ` Mauro Carvalho Chehab 2021-04-26 14:09 ` Sakari Ailus 2021-04-26 14:16 ` Mauro Carvalho Chehab 2021-04-26 14:29 ` Sakari Ailus 2021-04-26 17:32 ` Mauro Carvalho Chehab 2021-04-27 7:02 ` Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 26/78] media: i2c: dw9714: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 27/78] media: i2c: dw9768: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 28/78] media: i2c: dw9807-vcm: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 29/78] media: i2c: hi556: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 30/78] media: i2c: imx214: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 31/78] media: i2c: imx219: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 32/78] media: i2c: imx258: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 33/78] media: i2c: imx274: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 34/78] media: i2c: imx290: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 35/78] media: i2c: imx319: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 36/78] media: i2c: imx334: " Mauro Carvalho Chehab 2021-04-26 9:06 ` Alessandrelli, Daniele 2021-04-24 6:44 ` [PATCH 37/78] media: i2c: imx355: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 38/78] media: i2c: mt9m001: " Mauro Carvalho Chehab 2021-04-24 8:24 ` Jacopo Mondi 2021-04-24 10:00 ` Johan Hovold 2021-04-26 14:38 ` Mauro Carvalho Chehab 2021-04-27 12:23 ` Johan Hovold 2021-04-28 8:31 ` Mauro Carvalho Chehab 2021-04-28 10:05 ` Johan Hovold 2021-04-28 11:28 ` Mauro Carvalho Chehab 2021-04-28 11:56 ` Johan Hovold 2021-04-24 6:44 ` [PATCH 39/78] media: i2c: ov02a10: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 40/78] media: i2c: ov13858: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 41/78] media: i2c: ov2659: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 42/78] media: i2c: ov2685: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 43/78] media: i2c: ov2740: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 44/78] media: i2c: ov5647: " Mauro Carvalho Chehab 2021-04-24 8:30 ` Jacopo Mondi 2021-04-24 6:44 ` [PATCH 45/78] media: i2c: ov5648: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 46/78] media: i2c: ov5670: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 47/78] media: i2c: ov5675: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 48/78] media: i2c: ov5695: " Mauro Carvalho Chehab 2021-04-24 6:44 ` [PATCH 49/78] media: i2c: ov7740: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 50/78] media: i2c: ov8856: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 51/78] media: i2c: ov8865: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 52/78] media: i2c: ov9734: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 53/78] media: i2c: tvp5150: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 54/78] media: i2c: video-i2c: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 55/78] media: ipu3: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 56/78] media: coda: " Mauro Carvalho Chehab 2021-04-26 6:53 ` Philipp Zabel 2021-04-24 6:45 ` [PATCH 57/78] media: exynos4-is: " Mauro Carvalho Chehab 2021-04-24 6:45 ` Mauro Carvalho Chehab 2021-04-25 20:57 ` Sylwester Nawrocki 2021-04-25 20:57 ` Sylwester Nawrocki 2021-04-26 13:12 ` Mauro Carvalho Chehab 2021-04-26 13:12 ` Mauro Carvalho Chehab 2021-04-27 8:06 ` Sylwester Nawrocki [this message] 2021-04-27 8:06 ` Sylwester Nawrocki 2021-04-24 6:45 ` [PATCH 58/78] media: exynos-gsc: " Mauro Carvalho Chehab 2021-04-24 6:45 ` Mauro Carvalho Chehab 2021-04-27 8:18 ` Sylwester Nawrocki 2021-04-27 8:18 ` Sylwester Nawrocki 2021-04-27 9:30 ` Mauro Carvalho Chehab 2021-04-27 9:30 ` Mauro Carvalho Chehab 2021-04-27 9:42 ` Mauro Carvalho Chehab 2021-04-27 9:42 ` Mauro Carvalho Chehab 2021-04-27 11:50 ` Sylwester Nawrocki 2021-04-27 11:50 ` Sylwester Nawrocki 2021-04-28 7:13 ` Mauro Carvalho Chehab 2021-04-28 7:13 ` Mauro Carvalho Chehab 2021-04-28 7:17 ` Mauro Carvalho Chehab 2021-04-28 7:17 ` Mauro Carvalho Chehab 2021-04-28 8:27 ` Sylwester Nawrocki 2021-04-28 8:27 ` Sylwester Nawrocki 2021-04-24 6:45 ` [PATCH 59/78] media: mtk-jpeg: " Mauro Carvalho Chehab 2021-04-24 6:45 ` Mauro Carvalho Chehab 2021-04-24 6:45 ` Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 60/78] media: camss-csid: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 61/78] media: camss-csiphy: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 62/78] media: camss-ispif: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 63/78] media: camss-vfe: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 64/78] media: core: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 65/78] media: pm_helpers: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 66/78] media: vdec: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 67/78] media: venc: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 68/78] media: rcar-fcp: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 69/78] media: rcar-vin: " Mauro Carvalho Chehab 2021-04-24 8:33 ` Niklas Söderlund 2021-04-24 9:12 ` Geert Uytterhoeven 2021-04-26 13:33 ` Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 70/78] media: rga-buf: " Mauro Carvalho Chehab 2021-04-24 6:45 ` Mauro Carvalho Chehab 2021-04-24 6:45 ` Mauro Carvalho Chehab 2021-04-28 17:09 ` Ezequiel Garcia 2021-04-28 17:09 ` Ezequiel Garcia 2021-04-28 17:09 ` Ezequiel Garcia 2021-04-24 6:45 ` [PATCH 71/78] media: rkisp1-capture: " Mauro Carvalho Chehab 2021-04-24 6:45 ` Mauro Carvalho Chehab 2021-04-24 6:45 ` Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 72/78] media: s3c-camif: " Mauro Carvalho Chehab 2021-04-25 19:36 ` Sylwester Nawrocki 2021-04-24 6:45 ` [PATCH 73/78] media: s5p-mfc: " Mauro Carvalho Chehab 2021-04-24 6:45 ` Mauro Carvalho Chehab 2021-04-27 9:36 ` Sylwester Nawrocki 2021-04-27 9:36 ` Sylwester Nawrocki 2021-04-24 6:45 ` [PATCH 74/78] media: bdisp-v4l2: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 75/78] media: stm32: " Mauro Carvalho Chehab 2021-04-24 6:45 ` Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 76/78] media: sun4i_v4l2: " Mauro Carvalho Chehab 2021-04-24 6:45 ` Mauro Carvalho Chehab 2021-04-24 10:21 ` kernel test robot 2021-04-24 10:21 ` kernel test robot 2021-04-24 10:21 ` kernel test robot 2021-04-24 6:45 ` [PATCH 77/78] media: ti-vpe: " Mauro Carvalho Chehab 2021-04-24 6:45 ` [PATCH 78/78] media: vsp1: " Mauro Carvalho Chehab 2021-04-28 10:13 ` [PATCH 00/78] media: use pm_runtime_resume_and_get() instead of pm_runtime_get_sync() Dan Carpenter 2021-04-28 10:13 ` Dan Carpenter 2021-04-28 10:13 ` Dan Carpenter
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