From: Quinn Tran <qutran@xxxxxxxxxxx>
Clear wait for mailbox interrupt flag to prevent stale mailbox
Feb 22 05:22:56 ltcden4-lp7 kernel: qla2xxx [0135:90:00.1]-500a:4: LOOP UP detected (16 Gbps).
Feb 22 05:22:59 ltcden4-lp7 kernel: qla2xxx [0135:90:00.1]-d04c:4: MBX Command timeout for cmd 69, ...
To fix the issue, driver need to clear the MBX_INTR_WAIT flag
on purging the mailbox. When the stale mailbox completion do arrive, it
will be dropped.
Fixes: b6faaaf796d7 ("scsi: qla2xxx: Serialize mailbox request")
Cc: Naresh Bannoth <nbannoth@xxxxxxxxxx>
Cc: Kyle Mahlkuch <Kyle.Mahlkuch@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Naresh Bannoth <nbannoth@xxxxxxxxxx>
Tested-by: Naresh Bannoth <nbannoth@xxxxxxxxxx>
Signed-off-by: Quinn Tran <qutran@xxxxxxxxxxx>
Signed-off-by: Nilesh Javali <njavali@xxxxxxxxxxx>
---
drivers/scsi/qla2xxx/qla_mbx.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 16a736a7130d..643fa0052f5a 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -274,6 +274,12 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
atomic_inc(&ha->num_pend_mbx_stage3);
if (!wait_for_completion_timeout(&ha->mbx_intr_comp,
mcp->tov * HZ)) {
+ ql_dbg(ql_dbg_mbx, vha, 0x117a,
+ "cmd=%x Timeout.\n", command);
+ spin_lock_irqsave(&ha->hardware_lock, flags);
+ clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
if (chip_reset != ha->chip_reset) {
eeh_delay = ha->flags.eeh_busy ? 1 : 0;
@@ -286,12 +292,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
rval = QLA_ABORTED;
goto premature_exit;
}
- ql_dbg(ql_dbg_mbx, vha, 0x117a,
- "cmd=%x Timeout.\n", command);
- spin_lock_irqsave(&ha->hardware_lock, flags);
- clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
- spin_unlock_irqrestore(&ha->hardware_lock, flags);
-
} else if (ha->flags.purge_mbox ||
chip_reset != ha->chip_reset) {
eeh_delay = ha->flags.eeh_busy ? 1 : 0;
--
2.19.0.rc0
