[PATCH] drm/xlnx: Handle error for dma_set_mask

[Jiasheng Jiang]

As the potential failure of the dma_set_mask(),
it should be better to check it and return error
if fails.

Fixes: d76271d22694 ("drm: xlnx: DRM/KMS driver for Xilinx ZynqMP DisplayPort 
Subsystem")
Signed-off-by: Jiasheng Jiang <jiash...@iscas.ac.cn>
---
 drivers/gpu/drm/xlnx/zynqmp_dpsub.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c 
b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
index ac37053412a1..5bb42d0a2de9 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
@@ -200,7 +200,9 @@ static int zynqmp_dpsub_probe(struct platform_device *pdev)
        dpsub->dev = &pdev->dev;
        platform_set_drvdata(pdev, dpsub);
 
-       dma_set_mask(dpsub->dev, DMA_BIT_MASK(ZYNQMP_DISP_MAX_DMA_BIT));
+       ret = dma_set_mask(dpsub->dev, DMA_BIT_MASK(ZYNQMP_DISP_MAX_DMA_BIT));
+       if (ret)
+               return ret;
 
        /* Try the reserved memory. Proceed if there's none. */
        of_reserved_mem_device_init(&pdev->dev);
-- 
2.25.1