Since ipu3_css_buf_dequeue() never returns NULL, remove the
dead code to fix static checker warning:

drivers/staging/media/ipu3/ipu3.c:493 imgu_isr_threaded()
warn: 'b' is an error pointer or valid

Signed-off-by: Yong Zhi <[email protected]>
---
Link to Dan's bug report:
https://www.spinics.net/lists/linux-media/msg145043.html

 drivers/staging/media/ipu3/ipu3.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/media/ipu3/ipu3.c 
b/drivers/staging/media/ipu3/ipu3.c
index d521b3afb8b1..839d9398f8e9 100644
--- a/drivers/staging/media/ipu3/ipu3.c
+++ b/drivers/staging/media/ipu3/ipu3.c
@@ -489,12 +489,11 @@ static irqreturn_t imgu_isr_threaded(int irq, void 
*imgu_ptr)
                        mutex_unlock(&imgu->lock);
                } while (PTR_ERR(b) == -EAGAIN);
 
-               if (IS_ERR_OR_NULL(b)) {
-                       if (!b || PTR_ERR(b) == -EBUSY) /* All done */
-                               break;
-                       dev_err(&imgu->pci_dev->dev,
-                               "failed to dequeue buffers (%ld)\n",
-                               PTR_ERR(b));
+               if (IS_ERR(b)) {
+                       if (PTR_ERR(b) != -EBUSY)       /* All done */
+                               dev_err(&imgu->pci_dev->dev,
+                                       "failed to dequeue buffers (%ld)\n",
+                                       PTR_ERR(b));
                        break;
                }
 
-- 
2.7.4

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