Re: [patch] drm/radeon: check for allocation failure in radeon_ring_backup()

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On 20.07.2012 13:17, Dan Carpenter wrote:
Static checkers complain if this we don't check for allocation failure.
Also we can use the new kmalloc_array() function here as a cleanup.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
What's the benefit of using kmalloc_array instead of just kmalloc?

Anyway it's:

Reviewed-by: Christian König <christian.koenig@xxxxxxx>


diff --git a/drivers/gpu/drm/radeon/radeon_ring.c b/drivers/gpu/drm/radeon/radeon_ring.c
index 75cbe46..5a0ef24 100644
--- a/drivers/gpu/drm/radeon/radeon_ring.c
+++ b/drivers/gpu/drm/radeon/radeon_ring.c
@@ -402,7 +402,11 @@ unsigned radeon_ring_backup(struct radeon_device *rdev, struct radeon_ring *ring
  	}
/* and then save the content of the ring */
-	*data = kmalloc(size * 4, GFP_KERNEL);
+	*data = kmalloc_array(size, sizeof(uint32_t), GFP_KERNEL);
+	if (!*data) {
+		mutex_unlock(&rdev->ring_lock);
+		return 0;
+	}
  	for (i = 0; i < size; ++i) {
  		(*data)[i] = ring->ring[ptr++];
  		ptr &= ring->ptr_mask;


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