summaryrefslogtreecommitdiffstats
path: root/mm/bounce.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/bounce.c')
-rw-r--r--mm/bounce.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/bounce.c b/mm/bounce.c
index 3b549bf..b6d2d0f 100644
--- a/mm/bounce.c
+++ b/mm/bounce.c
@@ -265,6 +265,12 @@ void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
mempool_t *pool;
/*
+ * Data-less bio, nothing to bounce
+ */
+ if (bio_empty_barrier(*bio_orig))
+ return;
+
+ /*
* for non-isa bounce case, just check if the bounce pfn is equal
* to or bigger than the highest pfn in the system -- in that case,
* don't waste time iterating over bio segments
OpenPOWER on IntegriCloud