Reenabled linux-xen, added patches for Xen Kernel Version 2.6.27.31,

[people/teissler/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.fixes / block-fix-blk_start_queueing

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 (file)
index 0000000..e515e58
--- /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);