media: atomisp: get rid of a warning

On smatch, this warning is trigged:

	drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c:324 __bo_take_off_handling() error: we previously assumed 'bo->prev' could be null (see line 314)

Because it can't properly analize the truth table for the above
function. So, add an explicit check for the final condition there.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c b/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c
index c888f9c..a6620d2 100644 (file)
--- a/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c
+++ b/drivers/staging/media/atomisp/pci/atomisp2/hmm/hmm_bo.c
@@ -319,7 +319,7 @@ static void __bo_take_off_handling(struct hmm_buffer_object *bo)
         *      to take off this bo, we just set take the "prev/next" pointers
         *      to NULL, the free rbtree stays unchaged
         */
-       } else {
+       } else if (bo->prev != NULL && bo->next != NULL) {
                bo->next->prev = bo->prev;
                bo->prev->next = bo->next;
                bo->next = NULL;