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[Qemu-block] [PULL 05/14] block: remove extra condition in bdrv_can_writ

From: Jeff Cody
Subject: [Qemu-block] [PULL 05/14] block: remove extra condition in bdrv_can_write_zeroes_with_unmap
Date: Tue, 19 Jul 2016 20:20:53 -0400

From: "Denis V. Lunev" <address@hidden>

All .bdrv_co_write_zeroes callbacks nowadays work perfectly even
with backing store attached. If future new callbacks would be unable to do
that - they have a chance to block this in bdrv_get_info().

Signed-off-by: Denis V. Lunev <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
Reviewed-by: John Snow <address@hidden>
Reviewed-by: Fam Zheng <address@hidden>
Message-id: address@hidden
CC: Stefan Hajnoczi <address@hidden>
CC: Kevin Wolf <address@hidden>
CC: Max Reitz <address@hidden>
CC: Jeff Cody <address@hidden>
Signed-off-by: Jeff Cody <address@hidden>
 block.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block.c b/block.c
index d2dac3d..30d64e6 100644
--- a/block.c
+++ b/block.c
@@ -2837,7 +2837,7 @@ bool bdrv_can_write_zeroes_with_unmap(BlockDriverState 
     BlockDriverInfo bdi;
-    if (bs->backing || !(bs->open_flags & BDRV_O_UNMAP)) {
+    if (!(bs->open_flags & BDRV_O_UNMAP)) {
         return false;

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