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scsi: lpfc: Fix kernel Oops due to null pring pointers

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Driver is hitting null pring pointers in lpfc_do_work().

Pointer assignment occurs based on SLI-revision. If recovering after an
error, its possible the sli revision for the port was cleared, making the
lpfc_phba_elsring() not return a ring pointer, thus the null pointer.

Add SLI revision checking to lpfc_phba_elsring() and status checking to all
callers.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart
2018-11-29 16:09:32 -08:00
committed by Martin K. Petersen
parent 2c4c91415a
commit 5a9eeff57f
4 changed files with 16 additions and 1 deletions
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2
drivers/scsi/lpfc/lpfc_sli.c
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@@ -4687,6 +4687,8 @@ lpfc_sli_brdrestart_s4(struct lpfc_hba *phba)
hba_aer_enabled = phba->hba_flag & HBA_AER_ENABLED;
rc = lpfc_sli4_brdreset(phba);
if (rc)
return rc;
spin_lock_irq(&phba->hbalock);
phba->pport->stopped = 0;