[PATCH 1/3] md/raid5-cache: fix crc in rewrite_data_only_stripes()

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r5l_recovery_create_empty_meta_block() creates crc for the empty
metablock. After the metablock is updated, we need clear the
checksum before recalculate it.

Signed-off-by: Song Liu <songliubraving@xxxxxx>
---
 drivers/md/raid5-cache.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c
index c3b3124..875f963 100644
--- a/drivers/md/raid5-cache.c
+++ b/drivers/md/raid5-cache.c
@@ -2117,7 +2117,9 @@ r5c_recovery_rewrite_data_only_stripes(struct r5l_log *log,
 			}
 		}
 		mb->meta_size = cpu_to_le32(offset);
-		mb->checksum = crc32c_le(log->uuid_checksum, mb, PAGE_SIZE);
+		mb->checksum = 0;
+		mb->checksum = cpu_to_le32(crc32c_le(log->uuid_checksum,
+						     mb, PAGE_SIZE));
 		sync_page_io(log->rdev, ctx->pos, PAGE_SIZE, page,
 			     REQ_OP_WRITE, WRITE_FUA, false);
 		sh->log_start = ctx->pos;
-- 
2.9.3

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