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md: clean up invalid BUG_ON in md_ioctl 

[ Upstream commit 9dd8702e7cd28ebf076ff838933f29cf671165ec ]

'disk->private_data' is set to mddev in md_alloc() and never set to NULL,
and users need to open mddev before submitting ioctl. So mddev must not
have been freed during ioctl, and there is no need to check mddev here.
Clean up it.

Signed-off-by: Li Nan <linan122@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240226031444.3606764-4-linan666@huaweicloud.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Li Nan 2024-02-26 11:14:38 +08:00 committed by Greg Kroah-Hartman
parent 9cf3b89b4f
commit 60563755c9
1 changed files with 0 additions and 5 deletions
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5
drivers/md/md.c
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@ -7652,11 +7652,6 @@ static int md_ioctl(struct block_device *bdev, blk_mode_t mode,
mddev = bdev->bd_disk->private_data;
if (!mddev) {
BUG();
goto out;
}
/* Some actions do not requires the mutex */
switch (cmd) {
case GET_ARRAY_INFO: