X-Git-Url: http://git.ipfire.org/?p=people%2Fteissler%2Fipfire-2.x.git;a=blobdiff_plain;f=src%2Fpatches%2Fsuse-2.6.27.31%2Fpatches.fixes%2Fblock-fix-blk_start_queueing;fp=src%2Fpatches%2Fsuse-2.6.27.31%2Fpatches.fixes%2Fblock-fix-blk_start_queueing;h=e515e58539d16c2598efbe5c67cfa61f280b2c9b;hp=0000000000000000000000000000000000000000;hb=2cb7cef9f877c88c82c959e2944ff02a12d068fa;hpb=836f873377e58243cc856caa0586954efff79185

diff --git a/src/patches/suse-2.6.27.31/patches.fixes/block-fix-blk_start_queueing b/src/patches/suse-2.6.27.31/patches.fixes/block-fix-blk_start_queueing
new file mode 100644
index 000000000..e515e5853
--- /dev/null
+++ b/src/patches/suse-2.6.27.31/patches.fixes/block-fix-blk_start_queueing
@@ -0,0 +1,34 @@
+Subject: block: Fix blk_start_queueing() to not kick a stopped queue
+From: Elias Oltmanns <eo@nebensachen.de>
+Date: Thu Oct 9 08:56:20 2008 +0200:
+Git: 336c3d8ce771608815b65bcfa27a17a83b297328
+References: bnc#464155
+
+blk_start_queueing() should act like the generic queue unplugging
+and kicking and ignore a stopped queue. Such a queue may not be
+run until after a call to blk_start_queue().
+
+Signed-off-by: Elias Oltmanns <eo@nebensachen.de>
+Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
+Signed-off-by: Hannes Reinecke <hare@suse.de>
+
+---
+ block/blk-core.c |    6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+--- a/block/blk-core.c
++++ b/block/blk-core.c
+@@ -905,9 +905,11 @@ EXPORT_SYMBOL(blk_get_request);
+  */
+ void blk_start_queueing(struct request_queue *q)
+ {
+-	if (!blk_queue_plugged(q))
++	if (!blk_queue_plugged(q)) {
++		if (unlikely(blk_queue_stopped(q)))
++			return;
+ 		q->request_fn(q);
+-	else
++	} else
+ 		__generic_unplug_device(q);
+ }
+ EXPORT_SYMBOL(blk_start_queueing);