scsi: lpfc: Fix defects reported by Coverity Scan

Addressed the following reported defects:

** CID 1411552:  Control flow issues  (MISSING_BREAK)
/drivers/scsi/lpfc/lpfc_sli.c: 13259 in lpfc_sli4_nvmet_handle_rcqe()

** CID 1411553:  Memory - illegal accesses  (OVERRUN)
/drivers/scsi/lpfc/lpfc_sli.c: 16218 in lpfc_fc_frame_check()

** CID 1411553:  Memory - illegal accesses  (OVERRUN)
   Overrunning array "lpfc_rctl_names" of 202 8-byte elements at element
   index 244 (byte offset 1952) using index "fc_hdr->fh_r_ctl" (which
   evaluates to 244).

** CID 1411554:  Null pointer dereferences  (REVERSE_INULL)
/drivers/scsi/lpfc/lpfc_nvmet.c: 2131 in lpfc_nvmet_unsol_fcp_abort_cmp()

** CID 1411555:  Memory - illegal accesses  (UNINIT)
/drivers/scsi/lpfc/lpfc_nvmet.c: 180 in lpfc_nvmet_ctxbuf_post()

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/lpfc/lpfc_nvmet.c b/drivers/scsi/lpfc/lpfc_nvmet.c
index e82b9dc..dba1bd2 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_nvmet.c
+++ b/drivers/scsi/lpfc/lpfc_nvmet.c
@@ -170,7 +170,6 @@ lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
        struct lpfc_nvmet_tgtport *tgtp;
        struct fc_frame_header *fc_hdr;
        struct rqb_dmabuf *nvmebuf;
-       struct lpfc_dmabuf *hbufp;
        uint32_t *payload;
        uint32_t size, oxid, sid, rc;
        unsigned long iflag;
@@ -191,7 +190,6 @@ lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
 
        spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
        if (phba->sli4_hba.nvmet_io_wait_cnt) {
-               hbufp = &nvmebuf->hbuf;
                list_remove_head(&phba->sli4_hba.lpfc_nvmet_io_wait_list,
                                 nvmebuf, struct rqb_dmabuf,
                                 hbuf.list);
@@ -2164,10 +2162,6 @@ lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
        status = bf_get(lpfc_wcqe_c_status, wcqe);
        result = wcqe->parameter;
 
-       tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
-       if (ctxp->flag & LPFC_NVMET_ABORT_OP)
-               atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
-
        if (!ctxp) {
                /* if context is clear, related io alrady complete */
                lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
@@ -2177,6 +2171,10 @@ lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
                return;
        }
 
+       tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+       if (ctxp->flag & LPFC_NVMET_ABORT_OP)
+               atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
+
        /* Sanity check */
        if (ctxp->state != LPFC_NVMET_STE_ABORT) {
                lpfc_printf_log(phba, KERN_ERR, LOG_NVME_ABTS,

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index fb4c708..f60c9e3 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -13267,6 +13267,7 @@ lpfc_sli4_nvmet_handle_rcqe(struct lpfc_hba *phba, struct lpfc_queue *cq,
        case FC_STATUS_RQ_BUF_LEN_EXCEEDED:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "6126 Receive Frame Truncated!!\n");
+               /* Drop thru */
        case FC_STATUS_RQ_SUCCESS:
                lpfc_sli4_rq_release(hrq, drq);
                spin_lock_irqsave(&phba->hbalock, iflags);
@@ -16137,9 +16138,6 @@ lpfc_sli4_post_scsi_sgl_block(struct lpfc_hba *phba,
        return rc;
 }
 
-static char *lpfc_rctl_names[] = FC_RCTL_NAMES_INIT;
-static char *lpfc_type_names[] = FC_TYPE_NAMES_INIT;
-
 /**
  * lpfc_fc_frame_check - Check that this frame is a valid frame to handle
  * @phba: pointer to lpfc_hba struct that the frame was received on
@@ -16214,22 +16212,18 @@ lpfc_fc_frame_check(struct lpfc_hba *phba, struct fc_frame_header *fc_hdr)
        }
 
        lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
-                       "2538 Received frame rctl:%s (x%x), type:%s (x%x), "
+                       "2538 Received frame rctl:x%x, type:x%x, "
                        "frame Data:%08x %08x %08x %08x %08x %08x %08x\n",
-                       (fc_hdr->fh_r_ctl == FC_RCTL_MDS_DIAGS) ? "MDS Diags" :
-                       lpfc_rctl_names[fc_hdr->fh_r_ctl], fc_hdr->fh_r_ctl,
-                       (fc_hdr->fh_type == FC_TYPE_VENDOR_UNIQUE) ?
-                       "Vendor Unique" : lpfc_type_names[fc_hdr->fh_type],
-                       fc_hdr->fh_type, be32_to_cpu(header[0]),
-                       be32_to_cpu(header[1]), be32_to_cpu(header[2]),
-                       be32_to_cpu(header[3]), be32_to_cpu(header[4]),
-                       be32_to_cpu(header[5]), be32_to_cpu(header[6]));
+                       fc_hdr->fh_r_ctl, fc_hdr->fh_type,
+                       be32_to_cpu(header[0]), be32_to_cpu(header[1]),
+                       be32_to_cpu(header[2]), be32_to_cpu(header[3]),
+                       be32_to_cpu(header[4]), be32_to_cpu(header[5]),
+                       be32_to_cpu(header[6]));
        return 0;
 drop:
        lpfc_printf_log(phba, KERN_WARNING, LOG_ELS,
-                       "2539 Dropped frame rctl:%s type:%s\n",
-                       lpfc_rctl_names[fc_hdr->fh_r_ctl],
-                       lpfc_type_names[fc_hdr->fh_type]);
+                       "2539 Dropped frame rctl:x%x type:x%x\n",
+                       fc_hdr->fh_r_ctl, fc_hdr->fh_type);
        return 1;
 }