blob: a2f3effc14c9766076525cdb569fe6729ffe03d7 [file] [log] [blame]
From ba20da907f7ba0af3294ffff8dbccafafabf7db7 Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@suse.de>
Date: Thu, 16 Jan 2020 11:20:53 +0100
Subject: [PATCH] scsi: fnic: do not queue commands during fwreset
commit 0e2209629fec427ba75a6351486153a9feddd36b upstream.
When a link is going down the driver will be calling fnic_cleanup_io(),
which will traverse all commands and calling 'done' for each found command.
While the traversal is handled under the host_lock, calling 'done' happens
after the host_lock is being dropped.
As fnic_queuecommand_lck() is being called with the host_lock held, it
might well be that it will pick the command being selected for abortion
from the above routine and enqueue it for sending, but then 'done' is being
called on that very command from the above routine.
Which of course confuses the hell out of the scsi midlayer.
So fix this by not queueing commands when fnic_cleanup_io is active.
Link: https://lore.kernel.org/r/20200116102053.62755-1-hare@suse.de
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
index 80608b53897b..e3f5c91d5e4f 100644
--- a/drivers/scsi/fnic/fnic_scsi.c
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -439,6 +439,9 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_
if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
return SCSI_MLQUEUE_HOST_BUSY;
+ if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET)))
+ return SCSI_MLQUEUE_HOST_BUSY;
+
rport = starget_to_rport(scsi_target(sc->device));
if (!rport) {
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
--
2.7.4