From 0229c97ff6d59dcd42ce2deb54e801db5260875e Mon Sep 17 00:00:00 2001
From: Quinn Tran <qutran@marvell.com>
Date: Thu, 12 Sep 2019 11:09:06 -0700
Subject: [PATCH] scsi: qla2xxx: Fix unbound sleep in fcport delete path.
[ Upstream commit c3b6a1d397420a0fdd97af2f06abfb78adc370df ]
There are instances, though rare, where a LOGO request cannot be sent out
and the thread in free session done can wait indefinitely. Fix this by
putting an upper bound to sleep.
Link: https://lore.kernel.org/r/20190912180918.6436-3-hmadhani@marvell.com
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/qla2xxx/qla_target.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index 11f45cb99892..d13e91e16425 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -572,6 +572,7 @@ static void qlt_free_session_done(struct work_struct *work)
if (logout_started) {
bool traced = false;
+ u16 cnt = 0;
while (!ACCESS_ONCE(sess->logout_completed)) {
if (!traced) {
@@ -581,6 +582,9 @@ static void qlt_free_session_done(struct work_struct *work)
traced = true;
}
msleep(100);
+ cnt++;
+ if (cnt > 200)
+ break;
}
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,