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md/raid10: check replacement and rdev to prevent submit the same io twice

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After commit 4ca40c2ce0 ("md/raid10: Allow replacement device to be
replace old drive."), 'rdev' and 'replacement' could appear to be
identical. There are already checks for that in wait_blocked_dev() and
raid10_write_request(). Add check for raid10_handle_discard() now.

Signed-off-by: Li Nan <linan122@huawei.com>
Link: https://lore.kernel.org/r/20230701080529.2684932-2-linan666@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>
This commit is contained in:
Li Nan 2023-07-01 16:05:27 +08:00 committed by Song Liu
parent 21bd9a68fe
commit 7e85c41b9e
1 changed files with 2 additions and 0 deletions
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2
drivers/md/raid10.c
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@ -1785,6 +1785,8 @@ retry_discard:
r10_bio->devs[disk].bio = NULL;
r10_bio->devs[disk].repl_bio = NULL;
if (rdev == rrdev)
rrdev = NULL;
if (rdev && (test_bit(Faulty, &rdev->flags)))
rdev = NULL;
if (rrdev && (test_bit(Faulty, &rrdev->flags)))