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md: add comments in md_integrity_register

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Given it is not obvious for the error handling, let's try to add some
comments here to make it clear.

Signed-off-by: Guoqing Jiang <jiangguoqing@kylinos.cn>
Signed-off-by: Song Liu <song@kernel.org>
This commit is contained in:
Guoqing Jiang 2021-06-03 17:21:07 +08:00 committed by Song Liu
parent daee202471
commit de3ea66e9d
1 changed files with 6 additions and 0 deletions
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6
drivers/md/md.c
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@ -2343,6 +2343,12 @@ int md_integrity_register(struct mddev *mddev)
if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE) ||
(mddev->level != 1 && mddev->level != 10 &&
bioset_integrity_create(&mddev->io_acct_set, BIO_POOL_SIZE))) {
/*
* No need to handle the failure of bioset_integrity_create,
* because the function is called by md_run() -> pers->run(),
* md_run calls bioset_exit -> bioset_integrity_free in case
* of failure case.
*/
pr_err("md: failed to create integrity pool for %s\n",
mdname(mddev));
return -EINVAL;