From 78b990cf2822d1150a419c13be48e74aefa83f27 Mon Sep 17 00:00:00 2001
From: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Date: Sat, 4 Apr 2020 23:57:10 +0200
Subject: [PATCH] md: flush md_rdev_misc_wq for HOT_ADD_DISK case
Git-commit: 78b990cf2822d1150a419c13be48e74aefa83f27
Patch-mainline: v5.8-rc1
References: git-fixes
Since rdev->kobj is removed asynchronously, it is possible that the
rdev->kobj still exists when try to add the rdev again after rdev
is removed. But this path md_ioctl (HOT_ADD_DISK) -> hot_add_disk
-> bind_rdev_to_array missed it.
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Coly Li <colyli@suse.de>
---
drivers/md/md.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index f5dfa503fb6f..95b72e35b355 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7512,7 +7512,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
}
- if (cmd == ADD_NEW_DISK)
+ if (cmd == ADD_NEW_DISK || cmd == HOT_ADD_DISK)
flush_rdev_wq(mddev);
if (cmd == HOT_REMOVE_DISK)
--
2.35.3