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[v2,1/4,media] stm32-dcmi: catch dma submission error

Message ID 1503412871-29829-2-git-send-email-hugues.fruchet@st.com (mailing list archive)
State New, archived
Headers show

Commit Message

Hugues FRUCHET Aug. 22, 2017, 2:41 p.m. UTC 
Test cookie return by dmaengine_submit() and return error if any.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
---
 drivers/media/platform/stm32/stm32-dcmi.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
index c2168b5..7ffb2d3 100644
--- a/drivers/media/platform/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/stm32/stm32-dcmi.c
@@ -295,6 +295,10 @@  static int dcmi_start_dma(struct stm32_dcmi *dcmi,
 
 	/* Push current DMA transaction in the pending queue */
 	dcmi->dma_cookie = dmaengine_submit(desc);
+	if (dma_submit_error(dcmi->dma_cookie)) {
+		dev_err(dcmi->dev, "%s: DMA submission failed\n", __func__);
+		return -ENXIO;
+	}
 
 	dma_async_issue_pending(dcmi->dma_chan);