From c92c9fc8098777df0c9f4180507f49fbf743aae2 Mon Sep 17 00:00:00 2001
From: Tomas Henzl <thenzl@redhat.com>
Date: Fri, 9 Oct 2020 14:06:33 -0400
Subject: [PATCH 15/33] [scsi] scsi: mpt3sas: Don't call disable_irq from IRQ
 poll handler

Message-id: <20201009140636.7976-16-thenzl@redhat.com>
Patchwork-id: 330372
Patchwork-instance: patchwork
O-Subject: [RHEL8.4 e-stor PATCH 15/18] scsi: mpt3sas: Don't call disable_irq from IRQ poll handler
Bugzilla: 1851440
RH-Acked-by: Ewan Milne <emilne@redhat.com>
RH-Acked-by: Jarod Wilson <jarod@redhat.com>
RH-Acked-by: Maurizio Lombardi <mlombard@redhat.com>
RH-Acked-by: Tony Camuso <tcamuso@redhat.com>

disable_irq() might sleep, replace it with disable_irq_nosync(). For
synchronisation 'irq_poll_scheduled' is sufficient

Fixes: 320e77acb3 scsi: mpt3sas: Irq poll to avoid CPU hard lockups
Link: https://lore.kernel.org/r/20200901145026.12174-1-thenzl@redhat.com
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit b614d55b970d08bcac5b0bc15a5526181b3e4459)
Signed-off-by: Jan Stancek <jstancek@redhat.com>
---
 drivers/scsi/mpt3sas/mpt3sas_base.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 4aae441211bd..24dd90a72a80 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -1731,7 +1731,7 @@ _base_irqpoll(struct irq_poll *irqpoll, int budget)
 	reply_q = container_of(irqpoll, struct adapter_reply_queue,
 			irqpoll);
 	if (reply_q->irq_line_enable) {
-		disable_irq(reply_q->os_irq);
+		disable_irq_nosync(reply_q->os_irq);
 		reply_q->irq_line_enable = false;
 	}
 	num_entries = _base_process_reply_queue(reply_q);
-- 
2.13.6