From: Chao Yu yuchao0@huawei.com
commit 6980d29ce4da223ad7f0751c7f1d61d3c6b54ab3 upstream.
In zonefs_open_zone(), if opened zone count is larger than .s_max_open_zones threshold, we missed to recover .i_wr_refcnt, fix this.
Fixes: b5c00e975779 ("zonefs: open/close zone on file open/close") Cc: stable@vger.kernel.org Signed-off-by: Chao Yu yuchao0@huawei.com Signed-off-by: Damien Le Moal damien.lemoal@wdc.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/zonefs/super.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
--- a/fs/zonefs/super.c +++ b/fs/zonefs/super.c @@ -1032,9 +1032,7 @@ static int zonefs_open_zone(struct inode
mutex_lock(&zi->i_truncate_mutex);
- zi->i_wr_refcnt++; - if (zi->i_wr_refcnt == 1) { - + if (!zi->i_wr_refcnt) { if (atomic_inc_return(&sbi->s_open_zones) > sbi->s_max_open_zones) { atomic_dec(&sbi->s_open_zones); ret = -EBUSY; @@ -1044,7 +1042,6 @@ static int zonefs_open_zone(struct inode if (i_size_read(inode) < zi->i_max_size) { ret = zonefs_zone_mgmt(inode, REQ_OP_ZONE_OPEN); if (ret) { - zi->i_wr_refcnt--; atomic_dec(&sbi->s_open_zones); goto unlock; } @@ -1052,6 +1049,8 @@ static int zonefs_open_zone(struct inode } }
+ zi->i_wr_refcnt++; + unlock: mutex_unlock(&zi->i_truncate_mutex);