1 files changed, 50 insertions, 39 deletions

diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index b62a72dfab29..5c68cdd8736f 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -219,9 +219,19 @@ lpfc_issue_lip(struct Scsi_Host *host)
                 return -ENOMEM;
 
         memset((void *)pmboxq, 0, sizeof (LPFC_MBOXQ_t));
-        lpfc_init_link(phba, pmboxq, phba->cfg_topology, phba->cfg_link_speed);
+        pmboxq->mb.mbxCommand = MBX_DOWN_LINK;
+        pmboxq->mb.mbxOwner = OWN_HOST;
+
         mbxstatus = lpfc_sli_issue_mbox_wait(phba, pmboxq, phba->fc_ratov * 2);
 
+        if ((mbxstatus == MBX_SUCCESS) && (pmboxq->mb.mbxStatus == 0)) {
+                memset((void *)pmboxq, 0, sizeof (LPFC_MBOXQ_t));
+                lpfc_init_link(phba, pmboxq, phba->cfg_topology,
+                               phba->cfg_link_speed);
+                mbxstatus = lpfc_sli_issue_mbox_wait(phba, pmboxq,
+                                                     phba->fc_ratov * 2);
+        }
+
         if (mbxstatus == MBX_TIMEOUT)
                 pmboxq->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
         else
@@ -233,51 +243,53 @@ lpfc_issue_lip(struct Scsi_Host *host)
         return 0;
 }
 
-static ssize_t
-lpfc_nport_evt_cnt_show(struct class_device *cdev, char *buf)
+static int
+lpfc_selective_reset(struct lpfc_hba *phba)
 {
-        struct Scsi_Host *host = class_to_shost(cdev);
-        struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata;
-        return snprintf(buf, PAGE_SIZE, "%d\n", phba->nport_event_cnt);
+        struct completion online_compl;
+        int status = 0;
+
+        init_completion(&online_compl);
+        lpfc_workq_post_event(phba, &status, &online_compl,
+                              LPFC_EVT_OFFLINE);
+        wait_for_completion(&online_compl);
+
+        if (status != 0)
+                return -EIO;
+
+        init_completion(&online_compl);
+        lpfc_workq_post_event(phba, &status, &online_compl,
+                              LPFC_EVT_ONLINE);
+        wait_for_completion(&online_compl);
+
+        if (status != 0)
+                return -EIO;
+
+        return 0;
 }
 
 static ssize_t
-lpfc_board_online_show(struct class_device *cdev, char *buf)
+lpfc_issue_reset(struct class_device *cdev, const char *buf, size_t count)
 {
         struct Scsi_Host *host = class_to_shost(cdev);
         struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata;
+        int status = -EINVAL;
 
-        if (phba->fc_flag & FC_OFFLINE_MODE)
-                return snprintf(buf, PAGE_SIZE, "0\n");
+        if (strncmp(buf, "selective", sizeof("selective") - 1) == 0)
+                status = lpfc_selective_reset(phba);
+
+        if (status == 0)
+                return strlen(buf);
         else
-                return snprintf(buf, PAGE_SIZE, "1\n");
+                return status;
 }
 
 static ssize_t
-lpfc_board_online_store(struct class_device *cdev, const char *buf,
-                                                                size_t count)
+lpfc_nport_evt_cnt_show(struct class_device *cdev, char *buf)
 {
         struct Scsi_Host *host = class_to_shost(cdev);
         struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata;
-        struct completion online_compl;
-        int val=0, status=0;
-
-        if (sscanf(buf, "%d", &val) != 1)
-                return -EINVAL;
-
-        init_completion(&online_compl);
-
-        if (val)
-                lpfc_workq_post_event(phba, &status, &online_compl,
-                                                        LPFC_EVT_ONLINE);
-        else
-                lpfc_workq_post_event(phba, &status, &online_compl,
-                                                        LPFC_EVT_OFFLINE);
-        wait_for_completion(&online_compl);
-        if (!status)
-                return strlen(buf);
-        else
-                return -EIO;
+        return snprintf(buf, PAGE_SIZE, "%d\n", phba->nport_event_cnt);
 }
 
 static ssize_t
@@ -532,10 +544,9 @@ static CLASS_DEVICE_ATTR(lpfc_drvr_version, S_IRUGO, lpfc_drvr_version_show,
                          NULL);
 static CLASS_DEVICE_ATTR(management_version, S_IRUGO, management_version_show,
                          NULL);
-static CLASS_DEVICE_ATTR(board_online, S_IRUGO | S_IWUSR,
-                         lpfc_board_online_show, lpfc_board_online_store);
 static CLASS_DEVICE_ATTR(board_mode, S_IRUGO | S_IWUSR,
                          lpfc_board_mode_show, lpfc_board_mode_store);
+static CLASS_DEVICE_ATTR(issue_reset, S_IWUSR, NULL, lpfc_issue_reset);
 
 static int lpfc_poll = 0;
 module_param(lpfc_poll, int, 0);
@@ -695,12 +706,12 @@ LPFC_ATTR(discovery_threads, 32, 1, 64, "Maximum number of ELS commands "
                  "during discovery");
 
 /*
-# lpfc_max_luns: maximum number of LUNs per target driver will support
-# Value range is [1,32768]. Default value is 256.
-# NOTE: The SCSI layer will scan each target for this many luns
+# lpfc_max_luns: maximum allowed LUN.
+# Value range is [0,65535]. Default value is 255.
+# NOTE: The SCSI layer might probe all allowed LUN on some old targets.
 */
-LPFC_ATTR_R(max_luns, 256, 1, 32768,
-             "Maximum number of LUNs per target driver will support");
+LPFC_ATTR_R(max_luns, 255, 0, 65535,
+             "Maximum allowed LUN");
 
 /*
 # lpfc_poll_tmo: .Milliseconds driver will wait between polling FCP ring.
@@ -739,8 +750,8 @@ struct class_device_attribute *lpfc_host_attrs[] = {
         &class_device_attr_lpfc_max_luns,
         &class_device_attr_nport_evt_cnt,
         &class_device_attr_management_version,
-        &class_device_attr_board_online,
         &class_device_attr_board_mode,
+        &class_device_attr_issue_reset,
         &class_device_attr_lpfc_poll,
         &class_device_attr_lpfc_poll_tmo,
         NULL,