[patch 18/20] DM: Fix bug: BIO_RW_BARRIER requests to md/raid1 hang.

[Greg KH]

-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Neil Brown <neilb@xxxxxxx>

Both R1BIO_Barrier and R1BIO_Returned are 4 !!!!

This means that barrier requests don't get returned (i.e.  b_endio called)
because it looks like they already have been.

Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---

 include/linux/raid/raid1.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-2.6.16.orig/include/linux/raid/raid1.h
+++ linux-2.6.16/include/linux/raid/raid1.h
@@ -130,6 +130,6 @@ struct r1bio_s {
  * with failure when last write completes (and all failed).
  * Record that bi_end_io was called with this flag...
  */
-#define	R1BIO_Returned 4
+#define	R1BIO_Returned 6
 
 #endif

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