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scsi: lpfc: Fix coverity errors on NULL pointer checks

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Coverity flagged several scenarios where checking of null pointer values
wasn't consistent.

Fix the code to that be consistent on checking.

Link: https://lore.kernel.org/r/20190922035906.10977-12-jsmart2021@gmail.com
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 2019-09-21 20:58:57 -07:00 committed by Martin K. Petersen
parent 51f8e43ed3
commit 43bfea1bff
4 changed files with 27 additions and 8 deletions
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5
drivers/scsi/lpfc/lpfc_els.c
View File

@ -4291,6 +4291,11 @@ lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
irsp = &rspiocb->iocb;
if (!vport) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
"3177 ELS response failed\n");
goto out;
}
if (cmdiocb->context_un.mbox)
mbox = cmdiocb->context_un.mbox;

19
drivers/scsi/lpfc/lpfc_nvmet.c
View File

@ -1958,12 +1958,10 @@ lpfc_nvmet_unsol_ls_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
uint32_t *payload;
uint32_t size, oxid, sid, rc;
fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
oxid = be16_to_cpu(fc_hdr->fh_ox_id);
if (!phba->targetport) {
if (!nvmebuf || !phba->targetport) {
lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
"6154 LS Drop IO x%x\n", oxid);
"6154 LS Drop IO\n");
oxid = 0;
size = 0;
sid = 0;
@ -1971,6 +1969,9 @@ lpfc_nvmet_unsol_ls_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
goto dropit;
}
fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
oxid = be16_to_cpu(fc_hdr->fh_ox_id);
tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
payload = (uint32_t *)(nvmebuf->dbuf.virt);
size = bf_get(lpfc_rcqe_length, &nvmebuf->cq_event.cqe.rcqe_cmpl);
@ -2401,6 +2402,11 @@ lpfc_nvmet_unsol_ls_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
d_buf = piocb->context2;
nvmebuf = container_of(d_buf, struct hbq_dmabuf, dbuf);
if (!nvmebuf) {
lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
"3015 LS Drop IO\n");
return;
}
if (phba->nvmet_support == 0) {
lpfc_in_buf_free(phba, &nvmebuf->dbuf);
return;
@ -2429,6 +2435,11 @@ lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
uint64_t isr_timestamp,
uint8_t cqflag)
{
if (!nvmebuf) {
lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
"3167 NVMET FCP Drop IO\n");
return;
}
if (phba->nvmet_support == 0) {
lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
return;

2
drivers/scsi/lpfc/lpfc_scsi.c
View File

@ -3814,7 +3814,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
/* Sanity check on return of outstanding command */
cmd = lpfc_cmd->pCmd;
if (!cmd) {
if (!cmd || !phba) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
"2621 IO completion: Not an active IO\n");
spin_unlock(&lpfc_cmd->buf_lock);

9
drivers/scsi/lpfc/lpfc_sli.c
View File

@ -2674,7 +2674,8 @@ lpfc_sli_handle_mb_event(struct lpfc_hba *phba)
lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
"(%d):0323 Unknown Mailbox command "
"x%x (x%x/x%x) Cmpl\n",
pmb->vport ? pmb->vport->vpi : 0,
pmb->vport ? pmb->vport->vpi :
LPFC_VPORT_UNKNOWN,
pmbox->mbxCommand,
lpfc_sli_config_mbox_subsys_get(phba,
pmb),
@ -2695,7 +2696,8 @@ lpfc_sli_handle_mb_event(struct lpfc_hba *phba)
"(%d):0305 Mbox cmd cmpl "
"error - RETRYing Data: x%x "
"(x%x/x%x) x%x x%x x%x\n",
pmb->vport ? pmb->vport->vpi : 0,
pmb->vport ? pmb->vport->vpi :
LPFC_VPORT_UNKNOWN,
pmbox->mbxCommand,
lpfc_sli_config_mbox_subsys_get(phba,
pmb),
@ -2703,7 +2705,8 @@ lpfc_sli_handle_mb_event(struct lpfc_hba *phba)
pmb),
pmbox->mbxStatus,
pmbox->un.varWords[0],
pmb->vport->port_state);
pmb->vport ? pmb->vport->port_state :
LPFC_VPORT_UNKNOWN);
pmbox->mbxStatus = 0;
pmbox->mbxOwner = OWN_HOST;
rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);