scsi: mpt3sas: Don't call disable_irq from IRQ poll handler

[ Upstream commit b614d55b970d08bcac5b0bc15a5526181b3e4459 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 96b78fdc6b8a942cee5eab39bf1b3e7f1713df63..a85c9672c6ea3c535101c1f418a05bc74e34bc6d 100644 (file)
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -1732,7 +1732,7 @@ _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);