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dmaengine: stm32-dma: Fix PM usage counter imbalance in stm32 dma ops

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[ Upstream commit d54db74ad6e0dea8c253fb68c689b836657ab914 ]

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: 48bc73ba14 ("dmaengine: stm32-dma: Add PM Runtime support")
Fixes: 05f8740a0e ("dmaengine: stm32-dma: add suspend/resume power management support")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20210607064640.121394-2-zhangqilong3@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhang Qilong 2021-06-07 14:46:38 +08:00 committed by Greg Kroah-Hartman
parent 84656b4c27
commit bbce3c99f6
1 changed files with 2 additions and 2 deletions
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4
drivers/dma/stm32-dma.c
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@ -1187,7 +1187,7 @@ 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;
@ -1455,7 +1455,7 @@ 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;