[PATCH] V4L: fix videobof2 to correctly identify allocation failures

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The videobuf2-dma-contig allocator returns an ERR_PTR() on failure, not
a NULL like all other allocators. Fix videobuf2-core to also correctly
recognise those failures.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
---
 drivers/media/video/videobuf2-core.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/media/video/videobuf2-core.c b/drivers/media/video/videobuf2-core.c
index 6698c77..71734a4 100644
--- a/drivers/media/video/videobuf2-core.c
+++ b/drivers/media/video/videobuf2-core.c
@@ -51,7 +51,7 @@ static int __vb2_buf_mem_alloc(struct vb2_buffer *vb,
 	for (plane = 0; plane < vb->num_planes; ++plane) {
 		mem_priv = call_memop(q, plane, alloc, q->alloc_ctx[plane],
 					plane_sizes[plane]);
-		if (!mem_priv)
+		if (IS_ERR_OR_NULL(mem_priv))
 			goto free;
 
 		/* Associate allocator private data with this plane */
-- 
1.7.2.5

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