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scsi: lpfc: Fix crash on powering off BFS VM with passthrough device 

Null pointer dereference when BFS VM is powered off

The driver incorrectly uses sli3_ring on SLI-4 adapters

Use the correct ring structure based on sli_rev

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Tested-by: Raphael Silva <raphasil@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2017-06-01 21:07:04 -07:00 committed by Martin K. Petersen
parent 522dceeb62
commit ecbb227e63
1 changed files with 10 additions and 2 deletions
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12
drivers/scsi/lpfc/lpfc_sli.c
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@ -10951,6 +10951,7 @@ lpfc_sli_abort_iocb(struct lpfc_vport *vport, struct lpfc_sli_ring *pring,
struct lpfc_hba *phba = vport->phba;
struct lpfc_iocbq *iocbq;
struct lpfc_iocbq *abtsiocb;
struct lpfc_sli_ring *pring_s4;
IOCB_t *cmd = NULL;
int errcnt = 0, ret_val = 0;
int i;
@ -11004,8 +11005,15 @@ lpfc_sli_abort_iocb(struct lpfc_vport *vport, struct lpfc_sli_ring *pring,
/* Setup callback routine and issue the command. */
abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
ret_val = lpfc_sli_issue_iocb(phba, pring->ringno,
abtsiocb, 0);
if (phba->sli_rev == LPFC_SLI_REV4) {
pring_s4 = lpfc_sli4_calc_ring(phba, iocbq);
if (!pring_s4)
continue;
ret_val = lpfc_sli_issue_iocb(phba, pring_s4->ringno,
abtsiocb, 0);
} else
ret_val = lpfc_sli_issue_iocb(phba, pring->ringno,
abtsiocb, 0);
if (ret_val == IOCB_ERROR) {
lpfc_sli_release_iocbq(phba, abtsiocb);
errcnt++;