[PATCH] dmaengine: dw-axi-dmac: Fix runtime PM imbalance on error

[Dinghao Liu]

When axi_dma_resume() returns an error code, a pairing
runtime PM usage counter decrement is needed to keep the
counter balanced.

Signed-off-by: Dinghao Liu <dinghao....@zju.edu.cn>
---
 drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c 
b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
index 14c1ac26f866..a368d01170f1 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -924,8 +924,10 @@ static int dw_probe(struct platform_device *pdev)
         */
        pm_runtime_get_noresume(chip->dev);
        ret = axi_dma_resume(chip);
-       if (ret < 0)
+       if (ret < 0) {
+               pm_runtime_put(chip->dev);
                goto err_pm_disable;
+       }
 
        axi_dma_hw_init(chip);
 
-- 
2.17.1