scsi: lpfc: Remove IRQF_ONESHOT flag from threaded IRQ handling

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>

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 88b2e57d90c2e3a671ab2907318bf7a9f6f7144c..3363b0db65aeda9b44cdd9e7f147055f7a11eff6 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -13055,7 +13055,7 @@ 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) "