From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> To: unlisted-recipients:; (no To-header on input) Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Mauro Carvalho Chehab <mchehab+huawei@kernel.org>, Ezequiel Garcia <ezequiel@collabora.com>, Hans Verkuil <hverkuil-cisco@xs4all.nl>, Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>, 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: [PATCH 24/25] media: exynos-gsc: fix pm_runtime_get_sync() usage count Date: Wed, 5 May 2021 11:42:14 +0200 [thread overview] Message-ID: <d73f24e33fb9b1cc0ff968bec833184c6510b9ec.1620207353.git.mchehab+huawei@kernel.org> (raw) In-Reply-To: <cover.1620207353.git.mchehab+huawei@kernel.org> The pm_runtime_get_sync() internally increments the dev->power.usage_count without decrementing it, even on errors. Replace it by the new pm_runtime_resume_and_get(), introduced by: commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter") in order to properly decrement the usage counter, avoiding a potential PM usage counter leak. As a bonus, as pm_runtime_get_sync() always return 0 on success, the logic can be simplified. Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> --- drivers/media/platform/exynos-gsc/gsc-m2m.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/media/platform/exynos-gsc/gsc-m2m.c b/drivers/media/platform/exynos-gsc/gsc-m2m.c index 27a3c92c73bc..f1cf847d1cc2 100644 --- a/drivers/media/platform/exynos-gsc/gsc-m2m.c +++ b/drivers/media/platform/exynos-gsc/gsc-m2m.c @@ -56,10 +56,8 @@ static void __gsc_m2m_job_abort(struct gsc_ctx *ctx) static int gsc_m2m_start_streaming(struct vb2_queue *q, unsigned int count) { struct gsc_ctx *ctx = q->drv_priv; - int ret; - ret = pm_runtime_get_sync(&ctx->gsc_dev->pdev->dev); - return ret > 0 ? 0 : ret; + return pm_runtime_resume_and_get(&ctx->gsc_dev->pdev->dev); } static void __gsc_m2m_cleanup_queue(struct gsc_ctx *ctx) -- 2.30.2
WARNING: multiple messages have this Message-ID (diff)
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Mauro Carvalho Chehab <mchehab+huawei@kernel.org>, Ezequiel Garcia <ezequiel@collabora.com>, Hans Verkuil <hverkuil-cisco@xs4all.nl>, Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>, 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: [PATCH 24/25] media: exynos-gsc: fix pm_runtime_get_sync() usage count Date: Wed, 5 May 2021 11:42:14 +0200 [thread overview] Message-ID: <d73f24e33fb9b1cc0ff968bec833184c6510b9ec.1620207353.git.mchehab+huawei@kernel.org> (raw) In-Reply-To: <cover.1620207353.git.mchehab+huawei@kernel.org> The pm_runtime_get_sync() internally increments the dev->power.usage_count without decrementing it, even on errors. Replace it by the new pm_runtime_resume_and_get(), introduced by: commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter") in order to properly decrement the usage counter, avoiding a potential PM usage counter leak. As a bonus, as pm_runtime_get_sync() always return 0 on success, the logic can be simplified. Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> --- drivers/media/platform/exynos-gsc/gsc-m2m.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/media/platform/exynos-gsc/gsc-m2m.c b/drivers/media/platform/exynos-gsc/gsc-m2m.c index 27a3c92c73bc..f1cf847d1cc2 100644 --- a/drivers/media/platform/exynos-gsc/gsc-m2m.c +++ b/drivers/media/platform/exynos-gsc/gsc-m2m.c @@ -56,10 +56,8 @@ static void __gsc_m2m_job_abort(struct gsc_ctx *ctx) static int gsc_m2m_start_streaming(struct vb2_queue *q, unsigned int count) { struct gsc_ctx *ctx = q->drv_priv; - int ret; - ret = pm_runtime_get_sync(&ctx->gsc_dev->pdev->dev); - return ret > 0 ? 0 : ret; + return pm_runtime_resume_and_get(&ctx->gsc_dev->pdev->dev); } static void __gsc_m2m_cleanup_queue(struct gsc_ctx *ctx) -- 2.30.2 _______________________________________________ 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:[~2021-05-05 9:43 UTC|newest] Thread overview: 124+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-05 9:41 [PATCH 00/25] Fix some PM runtime issues at the media subsystem Mauro Carvalho Chehab 2021-05-05 9:41 ` Mauro Carvalho Chehab 2021-05-05 9:41 ` Mauro Carvalho Chehab 2021-05-05 9:41 ` Mauro Carvalho Chehab 2021-05-05 9:41 ` Mauro Carvalho Chehab 2021-05-05 9:41 ` [PATCH 01/25] staging: media: rkvdec: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab 2021-05-05 9:41 ` Mauro Carvalho Chehab 2021-05-05 9:41 ` Mauro Carvalho Chehab 2021-05-05 12:23 ` Jonathan Cameron 2021-05-05 12:23 ` Jonathan Cameron 2021-05-05 9:41 ` [PATCH 02/25] staging: media: imx7-mipi-csis: " Mauro Carvalho Chehab 2021-05-05 9:41 ` Mauro Carvalho Chehab 2021-05-05 9:41 ` Mauro Carvalho Chehab 2021-05-05 11:06 ` Jonathan Cameron 2021-05-05 11:06 ` Jonathan Cameron 2021-05-05 11:17 ` Mauro Carvalho Chehab 2021-05-05 11:17 ` Mauro Carvalho Chehab 2021-05-05 13:56 ` Rui Miguel Silva 2021-05-05 13:56 ` Rui Miguel Silva 2021-05-05 14:23 ` Mauro Carvalho Chehab 2021-05-05 14:23 ` Mauro Carvalho Chehab 2021-05-05 9:41 ` [PATCH 03/25] media: venus: Rework error fail recover logic Mauro Carvalho Chehab 2021-05-05 11:05 ` Jonathan Cameron 2021-05-05 9:41 ` [PATCH 04/25] media: s5p_cec: decrement usage count if disabled Mauro Carvalho Chehab 2021-05-05 12:24 ` Jonathan Cameron 2021-05-05 9:41 ` [PATCH 05/25] media: i2c: ccs-core: return the right error code at suspend Mauro Carvalho Chehab 2021-05-05 12:24 ` Jonathan Cameron 2021-05-05 12:51 ` Sakari Ailus 2021-05-05 9:41 ` [PATCH 06/25] media: i2c: imx334: fix the pm runtime get logic Mauro Carvalho Chehab 2021-05-05 11:10 ` Jonathan Cameron 2021-05-05 11:24 ` Mauro Carvalho Chehab 2021-05-05 12:26 ` Jonathan Cameron 2021-05-05 9:41 ` [PATCH 07/25] media: exynos-gsc: don't resume at remove time Mauro Carvalho Chehab 2021-05-05 9:41 ` Mauro Carvalho Chehab 2021-05-05 12:27 ` Jonathan Cameron 2021-05-05 12:27 ` Jonathan Cameron 2021-05-05 9:41 ` [PATCH 08/25] media: atmel: properly get pm_runtime Mauro Carvalho Chehab 2021-05-05 9:41 ` Mauro Carvalho Chehab 2021-05-05 12:08 ` Jonathan Cameron 2021-05-05 12:08 ` Jonathan Cameron 2021-06-10 9:04 ` Eugen.Hristev 2021-06-10 9:04 ` Eugen.Hristev 2021-06-10 9:38 ` Mauro Carvalho Chehab 2021-06-10 9:38 ` Mauro Carvalho Chehab 2021-06-10 12:00 ` Eugen.Hristev 2021-06-10 12:00 ` Eugen.Hristev 2021-06-16 8:03 ` Mauro Carvalho Chehab 2021-06-16 8:03 ` Mauro Carvalho Chehab 2021-09-06 8:03 ` Mauro Carvalho Chehab 2021-09-06 8:03 ` Mauro Carvalho Chehab 2021-09-06 8:13 ` Eugen.Hristev 2021-09-06 8:13 ` Eugen.Hristev 2021-09-13 10:26 ` Eugen.Hristev 2021-09-13 10:26 ` Eugen.Hristev 2021-05-05 9:41 ` [PATCH 09/25] media: hantro: do a PM resume earlier Mauro Carvalho Chehab 2021-05-05 9:41 ` Mauro Carvalho Chehab 2021-05-05 9:41 ` Mauro Carvalho Chehab 2021-05-05 11:34 ` Jonathan Cameron 2021-05-05 11:34 ` Jonathan Cameron 2021-05-05 13:22 ` Ezequiel Garcia 2021-05-05 13:22 ` Ezequiel Garcia 2021-05-05 13:22 ` Ezequiel Garcia 2021-05-05 13:46 ` Mauro Carvalho Chehab 2021-05-05 13:46 ` Mauro Carvalho Chehab 2021-05-05 14:01 ` Ezequiel Garcia 2021-05-05 14:01 ` Ezequiel Garcia 2021-05-05 14:01 ` Ezequiel Garcia 2021-05-05 14:15 ` Mauro Carvalho Chehab 2021-05-05 14:15 ` Mauro Carvalho Chehab 2021-05-05 9:42 ` [PATCH 10/25] media: marvel-ccic: fix some issues when getting pm_runtime Mauro Carvalho Chehab 2021-05-05 9:42 ` [PATCH 11/25] media: mdk-mdp: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab 2021-05-05 9:42 ` Mauro Carvalho Chehab 2021-05-05 9:42 ` Mauro Carvalho Chehab 2021-05-05 9:42 ` [PATCH 12/25] media: rcar_fdp1: simplify error check logic at fdp_open() Mauro Carvalho Chehab 2021-05-05 9:48 ` Sergei Shtylyov 2021-05-05 9:42 ` [PATCH 13/25] media: rcar_fdp1: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab 2021-05-05 12:31 ` Jonathan Cameron 2021-05-05 9:42 ` [PATCH 14/25] media: renesas-ceu: Properly check for PM errors Mauro Carvalho Chehab 2021-05-05 9:56 ` Jacopo Mondi 2021-05-05 9:42 ` [PATCH 15/25] media: s5p: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab 2021-05-05 12:31 ` Jonathan Cameron 2021-05-05 9:42 ` [PATCH 16/25] media: am437x: " Mauro Carvalho Chehab 2021-05-05 12:32 ` Jonathan Cameron 2021-05-08 13:01 ` Lad, Prabhakar 2021-05-05 9:42 ` [PATCH 17/25] media: sh_vou: " Mauro Carvalho Chehab 2021-05-05 9:42 ` [PATCH 18/25] media: mtk-vcodec: fix PM runtime get logic Mauro Carvalho Chehab 2021-05-05 9:42 ` Mauro Carvalho Chehab 2021-05-05 9:42 ` Mauro Carvalho Chehab 2021-05-05 12:32 ` Jonathan Cameron 2021-05-05 12:32 ` Jonathan Cameron 2021-05-05 12:32 ` Jonathan Cameron 2021-05-05 9:42 ` [PATCH 19/25] media: s5p-jpeg: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab 2021-05-05 9:42 ` Mauro Carvalho Chehab 2021-05-05 12:33 ` Jonathan Cameron 2021-05-05 12:33 ` Jonathan Cameron 2021-05-05 9:42 ` [PATCH 20/25] media: sti/delta: use pm_runtime_resume_and_get() Mauro Carvalho Chehab 2021-05-05 12:01 ` Jonathan Cameron 2021-05-05 12:33 ` Jonathan Cameron 2021-05-05 9:42 ` [PATCH 21/25] media: sunxi: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab 2021-05-05 9:42 ` Mauro Carvalho Chehab 2021-05-05 9:42 ` Mauro Carvalho Chehab 2021-05-05 9:42 ` [PATCH 22/25] media: sti/bdisp: " Mauro Carvalho Chehab 2021-05-05 12:34 ` Jonathan Cameron 2021-05-05 9:42 ` [PATCH 23/25] media: exynos4-is: " Mauro Carvalho Chehab 2021-05-05 9:42 ` Mauro Carvalho Chehab 2021-05-05 12:20 ` Jonathan Cameron 2021-05-05 12:20 ` Jonathan Cameron 2021-05-05 9:42 ` Mauro Carvalho Chehab [this message] 2021-05-05 9:42 ` [PATCH 24/25] media: exynos-gsc: " Mauro Carvalho Chehab 2021-05-05 12:34 ` Jonathan Cameron 2021-05-05 12:34 ` Jonathan Cameron 2021-05-05 9:42 ` [PATCH 25/25] media: i2c: ccs-core: " Mauro Carvalho Chehab 2021-05-05 10:34 ` Sakari Ailus 2021-05-05 10:57 ` Mauro Carvalho Chehab 2021-05-05 10:58 ` Mauro Carvalho Chehab 2021-05-05 12:35 ` Jonathan Cameron 2021-05-05 14:06 ` Mauro Carvalho Chehab 2021-05-05 16:36 ` Jonathan Cameron 2021-05-05 11:02 ` Sakari Ailus 2021-05-06 15:11 ` [PATCH 00/25] Fix some PM runtime issues at the media subsystem Mauro Carvalho Chehab 2021-05-06 15:11 ` Mauro Carvalho Chehab 2021-05-06 15:11 ` Mauro Carvalho Chehab 2021-05-06 15:11 ` Mauro Carvalho Chehab 2021-05-06 15:11 ` Mauro Carvalho Chehab
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