kfifo: fix warn_unused_result

Fix the "ignoring return value of '...', declared with attribute
warn_unused_result" compiler warning in several users of the new kfifo
API.

It removes the __must_check attribute from kfifo_in() and
kfifo_in_locked() which must not necessary performed.

Fix the allocation bug in the nozomi driver file, by moving out the
kfifo_alloc from the interrupt handler into the probe function.

Fix the kfifo_out() and kfifo_out_locked() users to handle a unexpected
end of fifo.

Signed-off-by: Stefani Seibold <stefani@seibold.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/cxgb3/cxio_resource.c b/drivers/infiniband/hw/cxgb3/cxio_resource.c
index dcbf2606c438..31f9201b2980 100644
--- a/drivers/infiniband/hw/cxgb3/cxio_resource.c
+++ b/drivers/infiniband/hw/cxgb3/cxio_resource.c
@@ -86,8 +86,9 @@ static int __cxio_init_resource_fifo(struct kfifo *fifo,
                         kfifo_in(fifo, (unsigned char *) &i, sizeof(u32));
 
         for (i = 0; i < skip_low + skip_high; i++)
-                kfifo_out_locked(fifo, (unsigned char *) &entry,
-                                sizeof(u32), fifo_lock);
+                if (kfifo_out_locked(fifo, (unsigned char *) &entry,
+                                sizeof(u32), fifo_lock) != sizeof(u32))
+                                        break;
         return 0;
 }