From: Zou Wei <zou_wei@huawei.com> To: <vkoul@kernel.org>, <orsonzhai@gmail.com>, <baolin.wang7@gmail.com>, <zhang.lyra@gmail.com>, <mcoquelin.stm32@gmail.com>, <alexandre.torgue@foss.st.com> Cc: <dmaengine@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-stm32@st-md-mailman.stormreply.com>, <linux-arm-kernel@lists.infradead.org>, Zou Wei <zou_wei@huawei.com> Subject: [PATCH -next] dmaengine: fix PM reference leak Date: Fri, 21 May 2021 20:58:22 +0800 [thread overview] Message-ID: <1621601902-33697-1-git-send-email-zou_wei@huawei.com> (raw) pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in reference leak here. Fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zou Wei <zou_wei@huawei.com> --- drivers/dma/sh/rcar-dmac.c | 2 +- drivers/dma/sprd-dma.c | 4 ++-- drivers/dma/stm32-dma.c | 4 ++-- drivers/dma/stm32-dmamux.c | 6 +++--- 4 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c index d530c1b..6885b3d 100644 --- a/drivers/dma/sh/rcar-dmac.c +++ b/drivers/dma/sh/rcar-dmac.c @@ -1913,7 +1913,7 @@ static int rcar_dmac_probe(struct platform_device *pdev) /* Enable runtime PM and initialize the device. */ pm_runtime_enable(&pdev->dev); - ret = pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) { dev_err(&pdev->dev, "runtime PM get sync failed (%d)\n", ret); return ret; diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index 0ef5ca8..65dde39 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -1203,7 +1203,7 @@ static int sprd_dma_probe(struct platform_device *pdev) pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); - ret = pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) goto err_rpm; @@ -1238,7 +1238,7 @@ static int sprd_dma_remove(struct platform_device *pdev) struct sprd_dma_chn *c, *cn; int ret; - ret = pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) return ret; diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index f54ecb1..7dd1d3d 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -1200,7 +1200,7 @@ static int stm32_dma_alloc_chan_resources(struct dma_chan *c) chan->config_init = false; - ret = pm_runtime_get_sync(dmadev->ddev.dev); + ret = pm_runtime_resume_and_get(dmadev->ddev.dev); if (ret < 0) return ret; @@ -1470,7 +1470,7 @@ static int stm32_dma_suspend(struct device *dev) struct stm32_dma_device *dmadev = dev_get_drvdata(dev); int id, ret, scr; - ret = pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); if (ret < 0) return ret; diff --git a/drivers/dma/stm32-dmamux.c b/drivers/dma/stm32-dmamux.c index ef0d055..a421643 100644 --- a/drivers/dma/stm32-dmamux.c +++ b/drivers/dma/stm32-dmamux.c @@ -137,7 +137,7 @@ static void *stm32_dmamux_route_allocate(struct of_phandle_args *dma_spec, /* Set dma request */ spin_lock_irqsave(&dmamux->lock, flags); - ret = pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) { spin_unlock_irqrestore(&dmamux->lock, flags); goto error; @@ -336,7 +336,7 @@ static int stm32_dmamux_suspend(struct device *dev) struct stm32_dmamux_data *stm32_dmamux = platform_get_drvdata(pdev); int i, ret; - ret = pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); if (ret < 0) return ret; @@ -361,7 +361,7 @@ static int stm32_dmamux_resume(struct device *dev) if (ret < 0) return ret; - ret = pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); if (ret < 0) return ret; -- 2.6.2
WARNING: multiple messages have this Message-ID (diff)
From: Zou Wei <zou_wei@huawei.com> To: <vkoul@kernel.org>, <orsonzhai@gmail.com>, <baolin.wang7@gmail.com>, <zhang.lyra@gmail.com>, <mcoquelin.stm32@gmail.com>, <alexandre.torgue@foss.st.com> Cc: <dmaengine@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-stm32@st-md-mailman.stormreply.com>, <linux-arm-kernel@lists.infradead.org>, Zou Wei <zou_wei@huawei.com> Subject: [PATCH -next] dmaengine: fix PM reference leak Date: Fri, 21 May 2021 20:58:22 +0800 [thread overview] Message-ID: <1621601902-33697-1-git-send-email-zou_wei@huawei.com> (raw) pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in reference leak here. Fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zou Wei <zou_wei@huawei.com> --- drivers/dma/sh/rcar-dmac.c | 2 +- drivers/dma/sprd-dma.c | 4 ++-- drivers/dma/stm32-dma.c | 4 ++-- drivers/dma/stm32-dmamux.c | 6 +++--- 4 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c index d530c1b..6885b3d 100644 --- a/drivers/dma/sh/rcar-dmac.c +++ b/drivers/dma/sh/rcar-dmac.c @@ -1913,7 +1913,7 @@ static int rcar_dmac_probe(struct platform_device *pdev) /* Enable runtime PM and initialize the device. */ pm_runtime_enable(&pdev->dev); - ret = pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) { dev_err(&pdev->dev, "runtime PM get sync failed (%d)\n", ret); return ret; diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index 0ef5ca8..65dde39 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -1203,7 +1203,7 @@ static int sprd_dma_probe(struct platform_device *pdev) pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); - ret = pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) goto err_rpm; @@ -1238,7 +1238,7 @@ static int sprd_dma_remove(struct platform_device *pdev) struct sprd_dma_chn *c, *cn; int ret; - ret = pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) return ret; diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index f54ecb1..7dd1d3d 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -1200,7 +1200,7 @@ static int stm32_dma_alloc_chan_resources(struct dma_chan *c) chan->config_init = false; - ret = pm_runtime_get_sync(dmadev->ddev.dev); + ret = pm_runtime_resume_and_get(dmadev->ddev.dev); if (ret < 0) return ret; @@ -1470,7 +1470,7 @@ static int stm32_dma_suspend(struct device *dev) struct stm32_dma_device *dmadev = dev_get_drvdata(dev); int id, ret, scr; - ret = pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); if (ret < 0) return ret; diff --git a/drivers/dma/stm32-dmamux.c b/drivers/dma/stm32-dmamux.c index ef0d055..a421643 100644 --- a/drivers/dma/stm32-dmamux.c +++ b/drivers/dma/stm32-dmamux.c @@ -137,7 +137,7 @@ static void *stm32_dmamux_route_allocate(struct of_phandle_args *dma_spec, /* Set dma request */ spin_lock_irqsave(&dmamux->lock, flags); - ret = pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) { spin_unlock_irqrestore(&dmamux->lock, flags); goto error; @@ -336,7 +336,7 @@ static int stm32_dmamux_suspend(struct device *dev) struct stm32_dmamux_data *stm32_dmamux = platform_get_drvdata(pdev); int i, ret; - ret = pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); if (ret < 0) return ret; @@ -361,7 +361,7 @@ static int stm32_dmamux_resume(struct device *dev) if (ret < 0) return ret; - ret = pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); if (ret < 0) return ret; -- 2.6.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2021-05-21 12:39 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-21 12:58 Zou Wei [this message] 2021-05-21 12:58 ` [PATCH -next] dmaengine: fix PM reference leak Zou Wei 2021-05-31 4:16 ` Vinod Koul 2021-05-31 4:16 ` Vinod Koul
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