It is possible that dma_request_chan will return EPROBE_DEFER,
which means that disp->dev is not ready yet. In this case,
dev_err(disp->dev), there will be no output. This patch fixes the bug.
Signed-off-by: Wang Ming <machel@xxxxxxxx>
---
drivers/gpu/drm/xlnx/zynqmp_disp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
index 3b87eebddc97..676f09fe8594 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
@@ -1094,8 +1094,8 @@ static int zynqmp_disp_layer_request_dma(struct zynqmp_disp *disp,
"%s%u", dma_names[layer->id], i);
dma->chan = dma_request_chan(disp->dev, dma_channel_name);
if (IS_ERR(dma->chan)) {
- dev_err(disp->dev, "failed to request dma channel\n");
- ret = PTR_ERR(dma->chan);
+ ret = dev_err_probe(disp->dev, PTR_ERR(dma->chan),
+ "failed to request dma channel\n");
dma->chan = NULL;
return ret;
}
--
2.25.1
