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| author | James Smart <jsmart2021@gmail.com> | 2018-11-29 16:09:32 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-12-07 22:35:32 -0500 |
| commit | 5a9eeff57f340238c39c95d8e7e54c96fc722de7 (patch) | |
| tree | f2073f16fb1c9fd2bed74791b7fe6828139a5865 | |
| parent | 2c4c91415a05677acc5c8131a5eb472d4aa96ae1 (diff) | |
| download | linux-stable-5a9eeff57f340238c39c95d8e7e54c96fc722de7.tar.gz linux-stable-5a9eeff57f340238c39c95d8e7e54c96fc722de7.tar.bz2 linux-stable-5a9eeff57f340238c39c95d8e7e54c96fc722de7.zip | |
scsi: lpfc: Fix kernel Oops due to null pring pointers
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>
| -rw-r--r-- | drivers/scsi/lpfc/lpfc.h | 6 | ||||
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_els.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_init.c | 7 | ||||
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_sli.c | 2 |
4 files changed, 16 insertions, 1 deletions
diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h index c23c29b451c2..b37e0caf0781 100644 --- a/drivers/scsi/lpfc/lpfc.h +++ b/drivers/scsi/lpfc/lpfc.h @@ -1277,6 +1277,12 @@ lpfc_sli_read_hs(struct lpfc_hba *phba) static inline struct lpfc_sli_ring * lpfc_phba_elsring(struct lpfc_hba *phba) { + /* Return NULL if sli_rev has become invalid due to bad fw */ + if (phba->sli_rev != LPFC_SLI_REV4 && + phba->sli_rev != LPFC_SLI_REV3 && + phba->sli_rev != LPFC_SLI_REV2) + return NULL; + if (phba->sli_rev == LPFC_SLI_REV4) { if (phba->sli4_hba.els_wq) return phba->sli4_hba.els_wq->pring; diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index 902234a1fcfb..3f21338d95d1 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -1343,6 +1343,8 @@ lpfc_els_abort_flogi(struct lpfc_hba *phba) Fabric_DID); pring = lpfc_phba_elsring(phba); + if (unlikely(!pring)) + return -EIO; /* * Check the txcmplq for an iocb that matches the nport the driver is diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index e95a768575b0..647a037d6f4d 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -1797,7 +1797,12 @@ lpfc_sli4_port_sta_fn_reset(struct lpfc_hba *phba, int mbx_action, lpfc_offline(phba); /* release interrupt for possible resource change */ lpfc_sli4_disable_intr(phba); - lpfc_sli_brdrestart(phba); + rc = lpfc_sli_brdrestart(phba); + if (rc) { + lpfc_printf_log(phba, KERN_ERR, LOG_INIT, + "6309 Failed to restart board\n"); + return rc; + } /* request and enable interrupt */ intr_mode = lpfc_sli4_enable_intr(phba, phba->intr_mode); if (intr_mode == LPFC_INTR_ERROR) { diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 353652fbc954..9821ab81c2f9 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -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; |