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

[ Upstream commit b614d55b97 ]

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>
5.4-rM2-2.2.x-imx-squashed
Tomas Henzl 2020-09-01 16:50:26 +02:00 committed by Greg Kroah-Hartman
parent aa204e20f4
commit 122cdbd501
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/mpt3sas/mpt3sas_base.c
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@ -1632,7 +1632,7 @@ _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);