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| author | Dinghao Liu <dinghao.liu@zju.edu.cn> | 2021-04-09 11:28:05 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-04-12 12:40:44 +0300 |
| commit | 917a3200b9f467a154999c7572af345f2470aaf4 (patch) | |
| tree | b0cc757e14b3bc1d83554a755de210be21a92f62 | |
| parent | ea45b6008f8095db0cc09ad6e03c7785c2986197 (diff) | |
| download | linux-917a3200b9f467a154999c7572af345f2470aaf4.tar.xz | |
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>
| -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; |