[SCSI] lpfc 8.3.14: SCSI and SLI API fixes

- Fixed accounting of allocated SCSI buffers when post sgl fails.
- Restrict scsi buffer allocation based on LUN count (sdev_cnt).
- Create __lpfc_sli_free_rpi that doesn't take out the hbalock.
- Modify lpfc_sli_free_rpi to call __lpfc_sli_free_rpi.
- Call __lpfc_sli_free_rpi in lpfc_cleanup_pending_mbox.
- Do not swap the strings returned in mailbox commands and do
  not swap byte aligned data in VPD.

Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 27 insertions, 7 deletions

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index f38c05dc5635..7ddf52682271 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -4236,7 +4236,8 @@ lpfc_sli4_read_rev(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq,
 	if (mqe->un.read_rev.avail_vpd_len < *vpd_size)
 		*vpd_size = mqe->un.read_rev.avail_vpd_len;
 
-	lpfc_sli_pcimem_bcopy(dmabuf->virt, vpd, *vpd_size);
+	memcpy(vpd, dmabuf->virt, *vpd_size);
+
 	dma_free_coherent(&phba->pcidev->dev, dma_size,
 			  dmabuf->virt, dmabuf->phys);
 	kfree(dmabuf);
@@ -5305,7 +5306,8 @@ lpfc_sli4_post_sync_mbox(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
 	if (mcqe_status != MB_CQE_STATUS_SUCCESS) {
 		bf_set(lpfc_mqe_status, mb, LPFC_MBX_ERROR_RANGE | mcqe_status);
 		rc = MBXERR_ERROR;
-	}
+	} else
+		lpfc_sli4_swap_str(phba, mboxq);
 
 	lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI,
 			"(%d):0356 Mailbox cmd x%x (x%x) Status x%x "
@@ -7790,9 +7792,10 @@ lpfc_sli_issue_mbox_wait(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq,
 		 * if LPFC_MBX_WAKE flag is set the mailbox is completed
 		 * else do not free the resources.
 		 */
-		if (pmboxq->mbox_flag & LPFC_MBX_WAKE)
+		if (pmboxq->mbox_flag & LPFC_MBX_WAKE) {
 			retval = MBX_SUCCESS;
-		else {
+			lpfc_sli4_swap_str(phba, pmboxq);
+		} else {
 			retval = MBX_TIMEOUT;
 			pmboxq->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 		}
@@ -11975,12 +11978,26 @@ lpfc_sli4_alloc_rpi(struct lpfc_hba *phba)
  * available rpis maintained by the driver.
  **/
 void
+__lpfc_sli4_free_rpi(struct lpfc_hba *phba, int rpi)
+{
+	if (test_and_clear_bit(rpi, phba->sli4_hba.rpi_bmask)) {
+		phba->sli4_hba.rpi_count--;
+		phba->sli4_hba.max_cfg_param.rpi_used--;
+	}
+}
+
+/**
+ * lpfc_sli4_free_rpi - Release an rpi for reuse.
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine is invoked to release an rpi to the pool of
+ * available rpis maintained by the driver.
+ **/
+void
 lpfc_sli4_free_rpi(struct lpfc_hba *phba, int rpi)
 {
 	spin_lock_irq(&phba->hbalock);
-	clear_bit(rpi, phba->sli4_hba.rpi_bmask);
-	phba->sli4_hba.rpi_count--;
-	phba->sli4_hba.max_cfg_param.rpi_used--;
+	__lpfc_sli4_free_rpi(phba, rpi);
 	spin_unlock_irq(&phba->hbalock);
 }
 
@@ -12751,6 +12768,9 @@ lpfc_cleanup_pending_mbox(struct lpfc_vport *vport)
 			continue;
 
 		if (mb->u.mb.mbxCommand == MBX_REG_LOGIN64) {
+			if (phba->sli_rev == LPFC_SLI_REV4)
+				__lpfc_sli4_free_rpi(phba,
+						mb->u.mb.un.varRegLogin.rpi);
 			mp = (struct lpfc_dmabuf *) (mb->context1);
 			if (mp) {
 				__lpfc_mbuf_free(phba, mp->virt, mp->phys);