[Xen-changelog] Correctly unmap ring page if using grant tables.

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User cl349@xxxxxxxxxxxxxxxxxxxx
# Node ID 6c8c3df37bfe5f8d1fa29409e454172e1bc29f21
# Parent  188c782fa9bbde655186380894fb35a89c9ba102
Correctly unmap ring page if using grant tables.
Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>

diff -r 188c782fa9bb -r 6c8c3df37bfe 
linux-2.6-xen-sparse/drivers/xen/blkback/interface.c
--- a/linux-2.6-xen-sparse/drivers/xen/blkback/interface.c      Fri Aug 19 
13:05:31 2005
+++ b/linux-2.6-xen-sparse/drivers/xen/blkback/interface.c      Fri Aug 19 
15:21:12 2005
@@ -199,8 +199,10 @@
     if (blkif->evtchn)
         unbind_evtchn_from_irqhandler(blkif->evtchn, blkif);
 
-    if (blkif->blk_ring.sring)
-           vfree(blkif->blk_ring.sring);
+    if (blkif->blk_ring.sring) {
+       unmap_frontend_page(blkif);
+       vfree(blkif->blk_ring.sring);
+    }
 
     pblkif = &blkif_hash[BLKIF_HASH(blkif->domid)];
     while ( *pblkif != blkif )

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