dmaengine: shdma: Fix runtime PM imbalance on error

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 <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: hyperlyz

drivers/dma/sh/shdma-base.c

@@ -115,8 +115,10 @@ 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);