[PATCH 6.6 098/301] scsi: lpfc: Remove IRQF_ONESHOT flag from threaded IRQ handling

Greg Kroah-Hartman
2024-05-14T11:11:00Z

From: Justin Tee <justin.tee@broadcom.com>

[ Upstream commit 4623713e7ade46bfc63a3eade836f566ccbcd771 ]

IRQF_ONESHOT is found to mask HBA generated interrupts when thread_fn is
running. As a result, some EQEs/CQEs miss timely processing resulting in
SCSI layer attempts to abort commands due to io_timeout. Abort CQEs are
also not processed leading to the observations of hangs and spam of "0748
abort handler timed out waiting for aborting I/O" log messages.

Remove the IRQF_ONESHOT flag. The cmpxchg and xchg atomic operations on
lpfc_queue->queue_claimed already protect potential parallel access to an
EQ/CQ should the thread_fn get interrupted by the primary irq handler.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20240305200503.57317-4-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/lpfc/lpfc_init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 2c336953e56ca..76c883cc66ed6 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -13051,7 +13051,7 @@ lpfc_sli4_enable_msix(struct lpfc_hba *phba)
rc = request_threaded_irq(eqhdl->irq,
&lpfc_sli4_hba_intr_handler,
&lpfc_sli4_hba_intr_handler_th,
- IRQF_ONESHOT, name, eqhdl);
+ 0, name, eqhdl);
if (rc) {
lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
"0486 MSI-X fast-path (%d) "
--
2.43.0