[SCSI] lpfc 8.3.31: Fixed system crash due to not providing SCSI error-handling host reset handler
Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index b410555..66e0906 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -4959,6 +4959,43 @@
}
/**
+ * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
+ * @cmnd: Pointer to scsi_cmnd data structure.
+ *
+ * This routine does host reset to the adaptor port. It brings the HBA
+ * offline, performs a board restart, and then brings the board back online.
+ * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
+ * reject all outstanding SCSI commands to the host and error returned
+ * back to SCSI mid-level. As this will be SCSI mid-level's last resort
+ * of error handling, it will only return error if resetting of the adapter
+ * is not successful; in all other cases, will return success.
+ *
+ * Return code :
+ * 0x2003 - Error
+ * 0x2002 - Success
+ **/
+static int
+lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
+{
+ struct Scsi_Host *shost = cmnd->device->host;
+ struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+ struct lpfc_hba *phba = vport->phba;
+ int rc, ret = SUCCESS;
+
+ lpfc_offline_prep(phba);
+ lpfc_offline(phba);
+ rc = lpfc_sli_brdrestart(phba);
+ if (rc)
+ ret = FAILED;
+ lpfc_online(phba);
+ lpfc_unblock_mgmt_io(phba);
+
+ lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
+ "3172 SCSI layer issued Host Reset Data: x%x\n", ret);
+ return ret;
+}
+
+/**
* lpfc_slave_alloc - scsi_host_template slave_alloc entry point
* @sdev: Pointer to scsi_device.
*
@@ -5090,6 +5127,7 @@
.eh_device_reset_handler = lpfc_device_reset_handler,
.eh_target_reset_handler = lpfc_target_reset_handler,
.eh_bus_reset_handler = lpfc_bus_reset_handler,
+ .eh_host_reset_handler = lpfc_host_reset_handler,
.slave_alloc = lpfc_slave_alloc,
.slave_configure = lpfc_slave_configure,
.slave_destroy = lpfc_slave_destroy,