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dmaengine: sprd: Cleanup in .remove() after pm_runtime_get_sync() failed

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It's not allowed to quit remove early without cleaning up completely.
Otherwise this results in resource leaks that probably yield graver
problems later. Here for example some tasklets might survive the lifetime
of the sprd-dma device and access sdev which is freed after .remove()
returns.

As none of the device freeing requires an active device, just ignore the
return value of pm_runtime_get_sync().

Signed-off-by: Uwe Kleine-König <[email protected]>
Reviewed-by: Baolin Wang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>
This commit is contained in:
Uwe Kleine-König authored and Vinod Koul committed 2022-07-26 18:20:49 +05:30
1 parent 36834c6701
commit 1e42f82cbe
1 file changed
+1 -4
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drivers/dma/sprd-dma.c
+1 -4
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@@ -1237,11 +1237,8 @@ static int sprd_dma_remove(struct platform_device *pdev)
{
struct sprd_dma_dev *sdev = platform_get_drvdata(pdev);
struct sprd_dma_chn *c, *cn;
int ret;
ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0)
return ret;
pm_runtime_get_sync(&pdev->dev);
/* explicitly free the irq */
if (sdev->irq > 0)