From: Hugues Fruchet <hugues.fruchet@st.com>
Date: Tue, 22 Aug 2017 14:41:08 +0000 (-0400)
Subject: media: stm32-dcmi: catch dma submission error
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=134e15e6815921cb6db4fa6a0453df3441989fad;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

media: stm32-dcmi: catch dma submission error

Test cookie return by dmaengine_submit() and return error if any.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---

diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
index c2168b5c7810..7ffb2d3e99be 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);