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dmaengine: shdma: Fix runtime PM imbalance on error

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[ Upstream commit 455896c53d5b803733ddd84e1bf8a430644439b6 ]

pm_runtime_get_() increments the runtime PM usage counter even
when it returns an error code, thus a matching decrement is needed on
the error handling path to keep the counter balanced.

Signed-off-by: Yongzhi Liu <lyz_cs@pku.edu.cn>
Link: https://lore.kernel.org/r/1642311296-87020-1-git-send-email-lyz_cs@pku.edu.cn
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yongzhi Liu 2022-01-15 21:34:56 -08:00 committed by Greg Kroah-Hartman
parent 2fe0e281f7
commit f67ae583a1
1 changed files with 3 additions and 1 deletions
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4
drivers/dma/sh/shdma-base.c
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@ -118,8 +118,10 @@ static dma_cookie_t shdma_tx_submit(struct dma_async_tx_descriptor *tx)
ret = pm_runtime_get(schan->dev);
spin_unlock_irq(&schan->chan_lock);
if (ret < 0)
if (ret < 0) {
dev_err(schan->dev, "%s(): GET = %d\n", __func__, ret);
pm_runtime_put(schan->dev);
}
pm_runtime_barrier(schan->dev);