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[REVIEWv4,33/34] solo6x10: check dma_map_sg() return value

Message ID cc3e9f6c7f74bb060f7f7afc45a65d71335d718f.1402573818.git.hans.verkuil@cisco.com (mailing list archive)
State New, archived
Headers show

Commit Message

Hans Verkuil June 12, 2014, 11:53 a.m. UTC 
From: Hans Verkuil <hans.verkuil@cisco.com>

The dma_map_sg() function can fail, so check for the return value.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
---
 drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)
diff mbox

Patch

diff --git a/drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c b/drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c
index ab0b1a6..d9d0941 100644
--- a/drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c
+++ b/drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c
@@ -478,8 +478,9 @@  static int solo_fill_jpeg(struct solo_enc_dev *solo_enc,
 	vb2_set_plane_payload(vb, 0, vop_jpeg_size(vh) + solo_enc->jpeg_len);
 
 	/* may discard all previous data in vbuf->sgl */
-	dma_map_sg(&solo_dev->pdev->dev, vbuf->sgl, vbuf->nents,
-			DMA_FROM_DEVICE);
+	if (!dma_map_sg(&solo_dev->pdev->dev, vbuf->sgl, vbuf->nents,
+			DMA_FROM_DEVICE))
+		return -ENOMEM;
 	ret = solo_send_desc(solo_enc, solo_enc->jpeg_len, vbuf,
 			     vop_jpeg_offset(vh) - SOLO_JPEG_EXT_ADDR(solo_dev),
 			     frame_size, SOLO_JPEG_EXT_ADDR(solo_dev),
@@ -525,8 +526,9 @@  static int solo_fill_mpeg(struct solo_enc_dev *solo_enc,
 	frame_size = ALIGN(vop_mpeg_size(vh) + skip, DMA_ALIGN);
 
 	/* may discard all previous data in vbuf->sgl */
-	dma_map_sg(&solo_dev->pdev->dev, vbuf->sgl, vbuf->nents,
-			DMA_FROM_DEVICE);
+	if (!dma_map_sg(&solo_dev->pdev->dev, vbuf->sgl, vbuf->nents,
+			DMA_FROM_DEVICE))
+		return -ENOMEM;
 	ret = solo_send_desc(solo_enc, skip, vbuf, frame_off, frame_size,
 			SOLO_MP4E_EXT_ADDR(solo_dev),
 			SOLO_MP4E_EXT_SIZE(solo_dev));