[PATCH] dmaengine: bcm2835: Print error in case setting DMA mask fails

[Stefan Wahren]

During enabling of the RPi 4, we found out that the driver doesn't provide
a helpful error message in case setting DMA mask fails. So add one.

Signed-off-by: Stefan Wahren <wahre...@gmx.net>
---
 drivers/dma/bcm2835-dma.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c
index 8101ff2f..970f654 100644
--- a/drivers/dma/bcm2835-dma.c
+++ b/drivers/dma/bcm2835-dma.c
@@ -871,8 +871,10 @@ static int bcm2835_dma_probe(struct platform_device *pdev)
                pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;

        rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
-       if (rc)
+       if (rc) {
+               dev_err(&pdev->dev, "Unable to set DMA mask\n");
                return rc;
+       }

        od = devm_kzalloc(&pdev->dev, sizeof(*od), GFP_KERNEL);
        if (!od)
--
2.7.4