[SCSI] lpfc 8.3.0 : Fix some memory handling issues

- Fix mailbox buffer leak on dump mailbox completion

- Fix mbuf leak in lpfc_pci_probe_one() SLI-2 mode error path

- Don't allocate HBQs in interrupt context

- Use correct size for FCP response buffer so that all available sense
  data is copied

- Fix jiffies calculation to prevent crash when collecting statistical
  data

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

3 files changed, 23 insertions, 74 deletions

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index e07f12a0871..7a216d478a9 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -255,8 +255,10 @@ lpfc_dump_wakeup_param_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq)
         /* character array used for decoding dist type. */
         char dist_char[] = "nabx";
 
-        if (pmboxq->mb.mbxStatus != MBX_SUCCESS)
+        if (pmboxq->mb.mbxStatus != MBX_SUCCESS) {
+                mempool_free(pmboxq, phba->mbox_mem_pool);
                 return;
+        }
 
         prg = (struct prog_id *) &prog_id_word;
 
@@ -274,6 +276,7 @@ lpfc_dump_wakeup_param_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq)
                 sprintf(phba->OptionROMVersion, "%d.%d%d%c%d",
                         prg->ver, prg->rev, prg->lev,
                         dist, prg->num);
+        mempool_free(pmboxq, phba->mbox_mem_pool);
         return;
 }
 
@@ -2889,6 +2892,8 @@ out_remove_device:
         lpfc_stop_phba_timers(phba);
         phba->pport->work_port_events = 0;
         lpfc_disable_intr(phba);
+        lpfc_sli_hba_down(phba);
+        lpfc_sli_brdrestart(phba);
 out_free_sysfs_attr:
         lpfc_free_sysfs_attr(vport);
 out_destroy_port:
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 51e6a639495..5f697ace970 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -66,6 +66,8 @@ lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
         if (cmd->result)
                 return;
 
+        latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
+
         spin_lock_irqsave(shost->host_lock, flags);
         if (!vport->stat_data_enabled ||
                 vport->stat_data_blocked ||
@@ -74,13 +76,15 @@ lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
                 spin_unlock_irqrestore(shost->host_lock, flags);
                 return;
         }
-        latency = jiffies_to_msecs(jiffies - lpfc_cmd->start_time);
 
         if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
                 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
                         phba->bucket_step;
-                if (i >= LPFC_MAX_BUCKET_COUNT)
-                        i = LPFC_MAX_BUCKET_COUNT;
+                /* check array subscript bounds */
+                if (i < 0)
+                        i = 0;
+                else if (i >= LPFC_MAX_BUCKET_COUNT)
+                        i = LPFC_MAX_BUCKET_COUNT - 1;
         } else {
                 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
                         if (latency <= (phba->bucket_base +
@@ -444,14 +448,14 @@ lpfc_new_scsi_buf(struct lpfc_vport *vport)
         bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
         bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
         bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
-        bpl[0].tus.w = le32_to_cpu(bpl->tus.w);
+        bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
 
         /* Setup the physical region for the FCP RSP */
         bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
         bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
         bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
         bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
-        bpl[1].tus.w = le32_to_cpu(bpl->tus.w);
+        bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
 
         /*
          * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 4e5b4ee121f..632feee233c 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -1259,68 +1259,6 @@ lpfc_sli_handle_mb_event(struct lpfc_hba *phba)
 }
 
 /**
- * lpfc_sli_replace_hbqbuff: Replace the HBQ buffer with a new buffer.
- * @phba: Pointer to HBA context object.
- * @tag: Tag for the HBQ buffer.
- *
- * This function is called from unsolicited event handler code path to get the
- * HBQ buffer associated with an unsolicited iocb. This function is called with
- * no lock held. It returns the buffer associated with the given tag and posts
- * another buffer to the firmware. Note that the new buffer must be allocated
- * before taking the hbalock and that the hba lock must be held until it is
- * finished with the hbq entry swap.
- **/
-static struct lpfc_dmabuf *
-lpfc_sli_replace_hbqbuff(struct lpfc_hba *phba, uint32_t tag)
-{
-        struct hbq_dmabuf *hbq_entry, *new_hbq_entry;
-        uint32_t hbqno;
-        void *virt;             /* virtual address ptr */
-        dma_addr_t phys;        /* mapped address */
-        unsigned long flags;
-
-        hbqno = tag >> 16;
-        new_hbq_entry = (phba->hbqs[hbqno].hbq_alloc_buffer)(phba);
-        /* Check whether HBQ is still in use */
-        spin_lock_irqsave(&phba->hbalock, flags);
-        if (!phba->hbq_in_use) {
-                if (new_hbq_entry)
-                        (phba->hbqs[hbqno].hbq_free_buffer)(phba,
-                                                            new_hbq_entry);
-                spin_unlock_irqrestore(&phba->hbalock, flags);
-                return NULL;
-        }
-
-        hbq_entry = lpfc_sli_hbqbuf_find(phba, tag);
-        if (hbq_entry == NULL) {
-                if (new_hbq_entry)
-                        (phba->hbqs[hbqno].hbq_free_buffer)(phba,
-                                                            new_hbq_entry);
-                spin_unlock_irqrestore(&phba->hbalock, flags);
-                return NULL;
-        }
-        list_del(&hbq_entry->dbuf.list);
-
-        if (new_hbq_entry == NULL) {
-                list_add_tail(&hbq_entry->dbuf.list, &phba->hbqbuf_in_list);
-                spin_unlock_irqrestore(&phba->hbalock, flags);
-                return &hbq_entry->dbuf;
-        }
-        new_hbq_entry->tag = -1;
-        phys = new_hbq_entry->dbuf.phys;
-        virt = new_hbq_entry->dbuf.virt;
-        new_hbq_entry->dbuf.phys = hbq_entry->dbuf.phys;
-        new_hbq_entry->dbuf.virt = hbq_entry->dbuf.virt;
-        hbq_entry->dbuf.phys = phys;
-        hbq_entry->dbuf.virt = virt;
-        lpfc_sli_free_hbq(phba, hbq_entry);
-        list_add_tail(&new_hbq_entry->dbuf.list, &phba->hbqbuf_in_list);
-        spin_unlock_irqrestore(&phba->hbalock, flags);
-
-        return &new_hbq_entry->dbuf;
-}
-
-/**
  * lpfc_sli_get_buff: Get the buffer associated with the buffer tag.
  * @phba: Pointer to HBA context object.
  * @pring: Pointer to driver SLI ring object.
@@ -1334,13 +1272,17 @@ lpfc_sli_replace_hbqbuff(struct lpfc_hba *phba, uint32_t tag)
  **/
 static struct lpfc_dmabuf *
 lpfc_sli_get_buff(struct lpfc_hba *phba,
-                        struct lpfc_sli_ring *pring,
-                        uint32_t tag)
+                  struct lpfc_sli_ring *pring,
+                  uint32_t tag)
 {
+        struct hbq_dmabuf *hbq_entry;
+
         if (tag & QUE_BUFTAG_BIT)
                 return lpfc_sli_ring_taggedbuf_get(phba, pring, tag);
-        else
-                return lpfc_sli_replace_hbqbuff(phba, tag);
+        hbq_entry = lpfc_sli_hbqbuf_find(phba, tag);
+        if (!hbq_entry)
+                return NULL;
+        return &hbq_entry->dbuf;
 }
 
 
@@ -1372,8 +1314,6 @@ lpfc_sli_process_unsol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
         match = 0;
         irsp = &(saveq->iocb);
 
-        if (irsp->ulpStatus == IOSTAT_NEED_BUFFER)
-                return 1;
         if (irsp->ulpCommand == CMD_ASYNC_STATUS) {
                 if (pring->lpfc_sli_rcv_async_status)
                         pring->lpfc_sli_rcv_async_status(phba, pring, saveq);