[SCSI] lpfc 8.1.6 : Fix Data Corruption in Bus Reset Path

This patch updates the lpfc driver to revision 8.1.6, which includes
the following changes:

 - Fix data corruption in SCSI BUS reset path, due to reusing
   the same request structure for each target.
 - Change version number to 8.1.6

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

1 files changed, 19 insertions, 49 deletions

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index f93799873721..7dc4c2e6bed2 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -629,8 +629,7 @@ lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
         struct lpfc_iocbq *piocbq;
         IOCB_t *piocb;
         struct fcp_cmnd *fcp_cmnd;
-        struct scsi_device *scsi_dev = lpfc_cmd->pCmd->device;
-        struct lpfc_rport_data *rdata = scsi_dev->hostdata;
+        struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
         struct lpfc_nodelist *ndlp = rdata->pnode;
 
         if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
@@ -665,56 +664,18 @@ lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
                 piocb->ulpTimeout = lpfc_cmd->timeout;
         }
 
-        lpfc_cmd->rdata = rdata;
-
-        switch (task_mgmt_cmd) {
-        case FCP_LUN_RESET:
-                /* Issue LUN Reset to TGT <num> LUN <num> */
-                lpfc_printf_log(phba,
-                                KERN_INFO,
-                                LOG_FCP,
-                                "%d:0703 Issue LUN Reset to TGT %d LUN %d "
-                                "Data: x%x x%x\n",
-                                phba->brd_no,
-                                scsi_dev->id, scsi_dev->lun,
-                                ndlp->nlp_rpi, ndlp->nlp_flag);
-
-                break;
-        case FCP_ABORT_TASK_SET:
-                /* Issue Abort Task Set to TGT <num> LUN <num> */
-                lpfc_printf_log(phba,
-                                KERN_INFO,
-                                LOG_FCP,
-                                "%d:0701 Issue Abort Task Set to TGT %d LUN %d "
-                                "Data: x%x x%x\n",
-                                phba->brd_no,
-                                scsi_dev->id, scsi_dev->lun,
-                                ndlp->nlp_rpi, ndlp->nlp_flag);
-
-                break;
-        case FCP_TARGET_RESET:
-                /* Issue Target Reset to TGT <num> */
-                lpfc_printf_log(phba,
-                                KERN_INFO,
-                                LOG_FCP,
-                                "%d:0702 Issue Target Reset to TGT %d "
-                                "Data: x%x x%x\n",
-                                phba->brd_no,
-                                scsi_dev->id, ndlp->nlp_rpi,
-                                ndlp->nlp_flag);
-                break;
-        }
-
         return (1);
 }
 
 static int
-lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba)
+lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
+                    unsigned  tgt_id, struct lpfc_rport_data *rdata)
 {
         struct lpfc_iocbq *iocbq;
         struct lpfc_iocbq *iocbqrsp;
         int ret;
 
+        lpfc_cmd->rdata = rdata;
         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
         if (!ret)
                 return FAILED;
@@ -726,6 +687,13 @@ lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba)
         if (!iocbqrsp)
                 return FAILED;
 
+        /* Issue Target Reset to TGT <num> */
+        lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
+                        "%d:0702 Issue Target Reset to TGT %d "
+                        "Data: x%x x%x\n",
+                        phba->brd_no, tgt_id, rdata->pnode->nlp_rpi,
+                        rdata->pnode->nlp_flag);
+
         ret = lpfc_sli_issue_iocb_wait(phba,
                                        &phba->sli.ring[phba->sli.fcp_ring],
                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
@@ -1021,6 +989,7 @@ lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
         lpfc_cmd->pCmd = cmnd;
         lpfc_cmd->timeout = 60;
         lpfc_cmd->scsi_hba = phba;
+        lpfc_cmd->rdata = rdata;
 
         ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
         if (!ret)
@@ -1033,6 +1002,11 @@ lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
         if (iocbqrsp == NULL)
                 goto out_free_scsi_buf;
 
+        lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
+                        "%d:0703 Issue LUN Reset to TGT %d LUN %d "
+                        "Data: x%x x%x\n", phba->brd_no, cmnd->device->id,
+                        cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
+
         ret = lpfc_sli_issue_iocb_wait(phba,
                                        &phba->sli.ring[phba->sli.fcp_ring],
                                        iocbq, iocbqrsp, lpfc_cmd->timeout);
@@ -1104,7 +1078,6 @@ lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
         int match;
         int ret = FAILED, i, err_count = 0;
         int cnt, loopcnt;
-        unsigned int midlayer_id = 0;
         struct lpfc_scsi_buf * lpfc_cmd;
 
         lpfc_block_requests(phba);
@@ -1124,7 +1097,6 @@ lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
          * targets known to the driver.  Should any target reset
          * fail, this routine returns failure to the midlayer.
          */
-        midlayer_id = cmnd->device->id;
         for (i = 0; i < MAX_FCP_TARGET; i++) {
                 /* Search the mapped list for this target ID */
                 match = 0;
@@ -1137,9 +1109,8 @@ lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
                 if (!match)
                         continue;
 
-                lpfc_cmd->pCmd->device->id = i;
-                lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
-                ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
+                ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba,
+                                          i, ndlp->rport->dd_data);
                 if (ret != SUCCESS) {
                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
                                 "%d:0713 Bus Reset on target %d failed\n",
@@ -1158,7 +1129,6 @@ lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
          * the targets.  Unfortunately, some targets do not abide by
          * this forcing the driver to double check.
          */
-        cmnd->device->id = midlayer_id;
         cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
                                 0, 0, LPFC_CTX_HOST);
         if (cnt)