[PATCH AUTOSEL 4.19 05/26] scsi: qla2xxx: Fix unbound sleep in fcport delete path.

Sasha Levin
2019-10-09T17:28:57Z

From: Quinn Tran <qutran@marvell.com>

[ 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 7a1cc0b25e594..d6dc320f81a7a 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -1023,6 +1023,7 @@ void qlt_free_session_done(struct work_struct *work)

if (logout_started) {
bool traced = false;
+ u16 cnt = 0;

while (!READ_ONCE(sess->logout_completed)) {
if (!traced) {
@@ -1032,6 +1033,9 @@ void qlt_free_session_done(struct work_struct *work)
traced = true;
}
msleep(100);
+ cnt++;
+ if (cnt > 200)
+ break;
}

ql_dbg(ql_dbg_disc, vha, 0xf087,
--
2.20.1