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dmaengine: tegra210-adma: Fix runtime PM imbalance on error

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[ Upstream commit 5b78fac4b1ba731cf4177fdbc1e3a4661521bcd0 ]

pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20200624064626.19855-1-dinghao.liu@zju.edu.cn
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dinghao Liu 2020-06-24 14:46:26 +08:00 • committed by Greg Kroah-Hartman
parent 652af51153
commit 4f1feb34df
1 changed files with 4 additions and 1 deletions

5
drivers/dma/tegra210-adma.c
View file

@ -583,6 +583,7 @@ static int tegra_adma_alloc_chan_resources(struct dma_chan *dc)
ret = pm_runtime_get_sync(tdc2dev(tdc));
if (ret < 0) {
pm_runtime_put_noidle(tdc2dev(tdc));
free_irq(tdc->irq, tdc);
return ret;
}
@ -764,8 +765,10 @@ static int tegra_adma_probe(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0)
if (ret < 0) {
pm_runtime_put_noidle(&pdev->dev);
goto rpm_disable;
}
ret = tegra_adma_init(tdma);
if (ret)