Commit 0a51fb71 authored by Konstantin Khlebnikov's avatar Konstantin Khlebnikov Committed by Jan Kara
Browse files

quota: add missing lock into __dquot_transfer() 



Lock dq_dqb_lock around dquot_decr_inodes()

Signed-off-by: default avatarKonstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: 7b9ca4c6 ("quota: Reduce contention on dq_data_lock")
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent 0666f560

fs/quota/dquot.c

+2 −0
Original line number Diff line number Diff line
@@ -1980,7 +1980,9 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to) 
		ret = dquot_add_space(transfer_to[cnt], cur_space, rsv_space, 0,

				      &warn_to[cnt]);

		if (ret) {

			spin_lock(&transfer_to[cnt]->dq_dqb_lock);

			dquot_decr_inodes(transfer_to[cnt], inode_usage);

			spin_unlock(&transfer_to[cnt]->dq_dqb_lock);

			goto over_quota;

		}

	}