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[PULL 5/5] block/io: Merge discard request alignments


From: Stefan Hajnoczi
Subject: [PULL 5/5] block/io: Merge discard request alignments
Date: Thu, 8 Jul 2021 14:11:43 +0100

From: Akihiko Odaki <akihiko.odaki@gmail.com>

Signed-off-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Message-id: 20210705130458.97642-3-akihiko.odaki@gmail.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 block/io.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/block/io.c b/block/io.c
index cf177a9d2d..e0a689c584 100644
--- a/block/io.c
+++ b/block/io.c
@@ -125,6 +125,8 @@ void bdrv_parent_drained_begin_single(BdrvChild *c, bool 
poll)
 
 static void bdrv_merge_limits(BlockLimits *dst, const BlockLimits *src)
 {
+    dst->pdiscard_alignment = MAX(dst->pdiscard_alignment,
+                                  src->pdiscard_alignment);
     dst->opt_transfer = MAX(dst->opt_transfer, src->opt_transfer);
     dst->max_transfer = MIN_NON_ZERO(dst->max_transfer, src->max_transfer);
     dst->max_hw_transfer = MIN_NON_ZERO(dst->max_hw_transfer,
-- 
2.31.1


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