diff options
| author |   Dinghao Liu <dinghao.liu@zju.edu.cn> | 2021-04-09 16:28:05 +0800 |
|---|---|---|
| committer |   Vinod Koul <vkoul@kernel.org> | 2021-04-12 15:10:44 +0530 |
| commit | 917a3200b9f467a154999c7572af345f2470aaf4 (patch) | |
| tree | b0cc757e14b3bc1d83554a755de210be21a92f62 /drivers/dma | |
| parent | dmaengine: Fix a double free in dma_async_device_register (diff) | |
| download | linux-dev-917a3200b9f467a154999c7572af345f2470aaf4.tar.xz linux-dev-917a3200b9f467a154999c7572af345f2470aaf4.zip | |
dmaengine: tegra20: Fix runtime PM imbalance on error
pm_runtime_get_sync() will increase the runtime PM counter
even it returns an error. Thus a pairing decrement is needed
to prevent refcount leak. Fix this by replacing this API with
pm_runtime_resume_and_get(), which will not change the runtime
PM counter on error.
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20210409082805.23643-1-dinghao.liu@zju.edu.cn
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/tegra20-apb-dma.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c index 71827d9b0aa1..b7260749e8ee 100644 --- a/drivers/dma/tegra20-apb-dma.c +++ b/drivers/dma/tegra20-apb-dma.c @@ -723,7 +723,7 @@ static void tegra_dma_issue_pending(struct dma_chan *dc) goto end; } if (!tdc->busy) { - err = pm_runtime_get_sync(tdc->tdma->dev); + err = pm_runtime_resume_and_get(tdc->tdma->dev); if (err < 0) { dev_err(tdc2dev(tdc), "Failed to enable DMA\n"); goto end; @@ -818,7 +818,7 @@ static void tegra_dma_synchronize(struct dma_chan *dc) struct tegra_dma_channel *tdc = to_tegra_dma_chan(dc); int err; - err = pm_runtime_get_sync(tdc->tdma->dev); + err = pm_runtime_resume_and_get(tdc->tdma->dev); if (err < 0) { dev_err(tdc2dev(tdc), "Failed to synchronize DMA: %d\n", err); return; |