diff options
| author | Zhang Qilong <zhangqilong3@huawei.com> | 2021-06-07 14:46:39 +0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-07-28 12:04:12 +0530 |
| commit | baa16371c9525f24d508508e4d296c031e1de29c (patch) | |
| tree | 42e8319d04ecd133f1037a780d18122f7f97465e | |
| parent | d54db74ad6e0dea8c253fb68c689b836657ab914 (diff) | |
dmaengine: stm32-dmamux: Fix PM usage counter unbalance in stm32 dmamux ops
pm_runtime_get_sync will increment pm usage counter
even it failed. Forgetting to putting operation will
result in reference leak here. We fix it by replacing
it with pm_runtime_resume_and_get to keep usage counter
balanced.
Fixes: 4f3ceca254e0f ("dmaengine: stm32-dmamux: Add PM Runtime support")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20210607064640.121394-3-zhangqilong3@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/dma/stm32-dmamux.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/dma/stm32-dmamux.c b/drivers/dma/stm32-dmamux.c index ef0d0555103d..a42164389ebc 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; |