diff options
| author | Tomas Henzl <thenzl@redhat.com> | 2020-09-10 17:21:26 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-09-16 01:36:50 +0300 |
| commit | 45181eab8ba79ed7a41b549f00500c0093828521 (patch) | |
| tree | 4ae7cfd9b4ad622d783be89718aa209a372321fd /drivers/scsi/mpt3sas | |
| parent | f38c43a0e9007e1f21a47a199643a16666902928 (diff) | |
| download | linux-45181eab8ba79ed7a41b549f00500c0093828521.tar.xz | |
scsi: mpt3sas: Fix sync irqs
_base_process_reply_queue() called from _base_interrupt() may schedule a
new irq poll. Fix this by calling synchronize_irq() first.
Also ensure that enable_irq() is called only when necessary to avoid
"Unbalanced enable for IRQ..." errors.
Link: https://lore.kernel.org/r/20200910142126.8147-1-thenzl@redhat.com
Fixes: 320e77acb327 ("scsi: mpt3sas: Irq poll to avoid CPU hard lockups")
Acked-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/mpt3sas')
| -rw-r--r-- | drivers/scsi/mpt3sas/mpt3sas_base.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index 24dd90a72a80..e08ad13714d4 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -1809,18 +1809,22 @@ mpt3sas_base_sync_reply_irqs(struct MPT3SAS_ADAPTER *ioc, u8 poll) /* TMs are on msix_index == 0 */ if (reply_q->msix_index == 0) continue; + synchronize_irq(pci_irq_vector(ioc->pdev, reply_q->msix_index)); if (reply_q->irq_poll_scheduled) { /* Calling irq_poll_disable will wait for any pending * callbacks to have completed. */ irq_poll_disable(&reply_q->irqpoll); irq_poll_enable(&reply_q->irqpoll); - reply_q->irq_poll_scheduled = false; - reply_q->irq_line_enable = true; - enable_irq(reply_q->os_irq); - continue; + /* check how the scheduled poll has ended, + * clean up only if necessary + */ + if (reply_q->irq_poll_scheduled) { + reply_q->irq_poll_scheduled = false; + reply_q->irq_line_enable = true; + enable_irq(reply_q->os_irq); + } } - synchronize_irq(pci_irq_vector(ioc->pdev, reply_q->msix_index)); } if (poll) _base_process_reply_queue(reply_q); |