Merge branch 'x86-bios-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[pandora-kernel.git] / block / blk-merge.c

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 3b0cd42..eafc94f 100644 (file)
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -361,6 +361,18 @@ static int attempt_merge(struct request_queue *q, struct request *req,
        if (!rq_mergeable(req) || !rq_mergeable(next))
                return 0;
 
+       /*
+        * Don't merge file system requests and discard requests
+        */
+       if ((req->cmd_flags & REQ_DISCARD) != (next->cmd_flags & REQ_DISCARD))
+               return 0;
+
+       /*
+        * Don't merge discard requests and secure discard requests
+        */
+       if ((req->cmd_flags & REQ_SECURE) != (next->cmd_flags & REQ_SECURE))
+               return 0;
+
        /*
         * not contiguous
         */