Linux 2.6.28-rc9

[h-e-n] / mm / bounce.c

diff --git a/mm/bounce.c b/mm/bounce.c
index 3b549bf..06722c4 100644 (file)
--- 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_has_data(*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