[PATCH 2/2] [media] vb2: Fix error handling in '__vb2_buf_mem_alloc'

[Christophe JAILLET]

'call_ptr_memop' can return NULL, so we must test its return value with
'IS_ERR_OR_NULL'. Otherwise, the test 'if (mem_priv)' is meaningless.

Signed-off-by: Christophe JAILLET <christophe.jail...@wanadoo.fr>
---
Note that error checking after 'call_ptr_memop' calls is not consistent
in this file. I guess that 'IS_ERR_OR_NULL' should be used everywhere
and that the corresponding error handling code should be tweaked just as
the code in this function.
---
 drivers/media/v4l2-core/videobuf2-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/v4l2-core/videobuf2-core.c 
b/drivers/media/v4l2-core/videobuf2-core.c
index c0175ea7e7ad..d1d3f5dd57b9 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -210,7 +210,7 @@ static int __vb2_buf_mem_alloc(struct vb2_buffer *vb)
                mem_priv = call_ptr_memop(vb, alloc,
                                q->alloc_devs[plane] ? : q->dev,
                                q->dma_attrs, size, dma_dir, q->gfp_flags);
-               if (IS_ERR(mem_priv)) {
+               if (IS_ERR_OR_NULL(mem_priv)) {
                        if (mem_priv)
                                ret = PTR_ERR(mem_priv);
                        goto free;
-- 
2.11.0