diff options
| author | James Smart <jsmart2021@gmail.com> | 2020-03-22 11:12:57 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-29 16:32:57 +0200 |
| commit | 0c5733a96261f0becf02153ede03cfb15f8e03a7 (patch) | |
| tree | a7d97acf375c7d8c2c78aa8c32dc536557a292d2 | |
| parent | 9d1062c4dd14517c5f22912dd56398308290dbfd (diff) | |
scsi: lpfc: Fix crash after handling a pci error
[ Upstream commit 4cd70891308dfb875ef31060c4a4aa8872630a2e ]
Injecting EEH on a 32GB card is causing kernel oops
The pci error handler is doing an IO flush and the offline code is also
doing an IO flush. When the 1st flush is complete the hdwq is destroyed
(freed), yet the second flush accesses the hdwq and crashes.
Added a check in lpfc_sli4_fush_io_rings to check both the HBA_IOQ_FLUSH
flag and the hdwq pointer to see if it is already set and not already
freed.
Link: https://lore.kernel.org/r/20200322181304.37655-6-jsmart2021@gmail.com
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_sli.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 1692ce913b7f..a951e1c8165e 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -4013,6 +4013,11 @@ lpfc_sli_flush_io_rings(struct lpfc_hba *phba) struct lpfc_iocbq *piocb, *next_iocb; spin_lock_irq(&phba->hbalock); + if (phba->hba_flag & HBA_IOQ_FLUSH || + !phba->sli4_hba.hdwq) { + spin_unlock_irq(&phba->hbalock); + return; + } /* Indicate the I/O queues are flushed */ phba->hba_flag |= HBA_IOQ_FLUSH; spin_unlock_irq(&phba->hbalock); |