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staging: erofs: set sb->s_root to NULL when failing from __getname() 

Set sb->s_root to NULL when failing from __getname(),
so that we can avoid double dput and unnecessary operations
in generic_shutdown_super().

Signed-off-by: Chengguang Xu <cgxu519@gmail.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Reviewed-by: Gao Xiang <gaoxiang25@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.2
Chengguang Xu 2019-05-06 19:01:02 +08:00 committed by Greg Kroah-Hartman
parent 083a685c2e
commit f2dcb8841e
1 changed files with 1 additions and 0 deletions
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drivers/staging/erofs/super.c
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@ -457,6 +457,7 @@ static int erofs_read_super(struct super_block *sb,
*/
err_devname:
dput(sb->s_root);
sb->s_root = NULL;
err_iget:
#ifdef EROFS_FS_HAS_MANAGED_CACHE
iput(sbi->managed_cache);