[PATCH] staging: mt7621-dma: Fix a resource leak in an error handling path

[Christophe JAILLET]

If an error occurs after calling 'mtk_hsdma_init()', it must be undone by
a corresponding call to 'mtk_hsdma_uninit()' as already done in the
remove function.

Fixes: 0853c7a53eb3 ("staging: mt7621-dma: ralink: add rt2880 dma engine")
Signed-off-by: Christophe JAILLET <christophe.jail...@wanadoo.fr>
---
 drivers/staging/mt7621-dma/mtk-hsdma.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/mt7621-dma/mtk-hsdma.c 
b/drivers/staging/mt7621-dma/mtk-hsdma.c
index d241349214e7..bc4bb4374313 100644
--- a/drivers/staging/mt7621-dma/mtk-hsdma.c
+++ b/drivers/staging/mt7621-dma/mtk-hsdma.c
@@ -712,7 +712,7 @@ static int mtk_hsdma_probe(struct platform_device *pdev)
        ret = dma_async_device_register(dd);
        if (ret) {
                dev_err(&pdev->dev, "failed to register dma device\n");
-               return ret;
+               goto err_uninit_hsdma;
        }
 
        ret = of_dma_controller_register(pdev->dev.of_node,
@@ -728,6 +728,8 @@ static int mtk_hsdma_probe(struct platform_device *pdev)
 
 err_unregister:
        dma_async_device_unregister(dd);
+err_uninit_hsdma:
+       mtk_hsdma_uninit(hsdma);
        return ret;
 }
 
-- 
2.27.0