[SCSI] lpfc 8.1.7: Adding new issue_reset sysfs attribute

Adding new issue_reset sysfs attribute

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

1 files changed, 43 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 511de17a1f83..cdae011b2813 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -243,6 +243,47 @@ lpfc_issue_lip(struct Scsi_Host *host)
         return 0;
 }
 
+static int
+lpfc_selective_reset(struct lpfc_hba *phba)
+{
+        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_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 (strncmp(buf, "selective", sizeof("selective") - 1) == 0)
+                status = lpfc_selective_reset(phba);
+
+        if (status == 0)
+                return strlen(buf);
+        else
+                return status;
+}
+
 static ssize_t
 lpfc_nport_evt_cnt_show(struct class_device *cdev, char *buf)
 {
@@ -546,6 +587,7 @@ 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);
@@ -751,6 +793,7 @@ struct class_device_attribute *lpfc_host_attrs[] = {
         &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,