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 <[email protected]> Acked-by: Thierry Reding <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Vinod Koul <[email protected]>
Kleist · Apr 12, 2021 · 917a320 · 917a320
1 parent ea45b60
commit 917a320
Showing 1 changed file with 2 additions and 2 deletions.
diff --git 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;