4.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mikhail Malygin <m.maly...@yadro.com>
commit 49d7bd36813ea8e6b4c97b640d24e7fbd44c84f0 upstream.
The patch reverts changes done in qlt_schedule_sess_for_deletion() to
avoid spinlock recursion sess->vha->work_lock should be used instead
of ha->tgt.sess_lock, that can be locked in callers: qlt_reset() or
qlt_handle_login()
[mkp: roll in build warning reported by sfr]
Fixes: 1c6cacf4ea6c04 ("scsi: qla2xxx: Fixup locking for session deletion")
Cc: <sta...@vger.kernel.org> #v4.17
Signed-off-by: Mikhail Malygin <m.maly...@yadro.com>
Reported-by: Mikhail Malygin <m.maly...@yadro.com>
Tested-by: Mikhail Malygin <m.maly...@yadro.com>
Acked-by: Himanshu Madhani <himanshu.madh...@cavium.com>
Signed-off-by: Martin K. Petersen <martin.peter...@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/scsi/qla2xxx/qla_target.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -1230,7 +1230,6 @@ static void qla24xx_chk_fcp_state(struct
void qlt_schedule_sess_for_deletion(struct fc_port *sess)
{
struct qla_tgt *tgt = sess->tgt;
- struct qla_hw_data *ha = sess->vha->hw;
unsigned long flags;
if (sess->disc_state == DSC_DELETE_PEND)
@@ -1247,16 +1246,16 @@ void qlt_schedule_sess_for_deletion(stru
return;
}
- spin_lock_irqsave(&ha->tgt.sess_lock, flags);
if (sess->deleted == QLA_SESS_DELETED)
sess->logout_on_delete = 0;
+ spin_lock_irqsave(&sess->vha->work_lock, flags);
if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
- spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
+ spin_unlock_irqrestore(&sess->vha->work_lock, flags);
return;
}
sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
- spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
+ spin_unlock_irqrestore(&sess->vha->work_lock, flags);
sess->disc_state = DSC_DELETE_PEND;
