Current algothim relies on the fact that caller will align the
size to PAGE_SIZE, otherwise order will be decreased to negative
when remain size is less than PAGE_SIZE, it makes the function
hard to be migrated.
This patch sloves the hidden problem.
Signed-off-by: Zhaowei Yuan <zhaowei.y...@samsung.com>
---
drivers/media/v4l2-core/videobuf2-dma-sg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c
b/drivers/media/v4l2-core/videobuf2-dma-sg.c
index adefc31..40d18aa 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-sg.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c
@@ -58,7 +58,7 @@ static int vb2_dma_sg_alloc_compacted(struct vb2_dma_sg_buf
*buf,
order = get_order(size);
/* Dont over allocate*/
- if ((PAGE_SIZE << order) > size)
+ if (order > 0 && (PAGE_SIZE << order) > size)
order--;
pages = NULL;
--
1.7.9.5
--
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