1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index d3c9cdee292b..09a455d4b6ed 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -103,6 +103,7 @@ static int megasas_poll_wait_aen;
 static DECLARE_WAIT_QUEUE_HEAD(megasas_poll_wait);
 static u32 support_poll_for_event;
 static u32 megasas_dbg_lvl;
+static u32 support_device_change;
 
 /* define lock for aen poll */
 spinlock_t poll_aen_lock;
@@ -4658,6 +4659,15 @@ megasas_sysfs_show_support_poll_for_event(struct device_driver *dd, char *buf)
 static DRIVER_ATTR(support_poll_for_event, S_IRUGO,
                         megasas_sysfs_show_support_poll_for_event, NULL);
 
+ static ssize_t
+megasas_sysfs_show_support_device_change(struct device_driver *dd, char *buf)
+{
+        return sprintf(buf, "%u\n", support_device_change);
+}
+
+static DRIVER_ATTR(support_device_change, S_IRUGO,
+                        megasas_sysfs_show_support_device_change, NULL);
+
 static ssize_t
 megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf)
 {
@@ -4978,6 +4988,7 @@ static int __init megasas_init(void)
                MEGASAS_EXT_VERSION);
 
         support_poll_for_event = 2;
+        support_device_change = 1;
 
         memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
 
@@ -5026,8 +5037,17 @@ static int __init megasas_init(void)
         if (rval)
                 goto err_dcf_poll_mode_io;
 
+        rval = driver_create_file(&megasas_pci_driver.driver,
+                                &driver_attr_support_device_change);
+        if (rval)
+                goto err_dcf_support_device_change;
+
         return rval;
 
+err_dcf_support_device_change:
+        driver_remove_file(&megasas_pci_driver.driver,
+                  &driver_attr_poll_mode_io);
+
 err_dcf_poll_mode_io:
         driver_remove_file(&megasas_pci_driver.driver,
                            &driver_attr_dbg_lvl);
@@ -5058,6 +5078,10 @@ static void __exit megasas_exit(void)
         driver_remove_file(&megasas_pci_driver.driver,
                            &driver_attr_dbg_lvl);
         driver_remove_file(&megasas_pci_driver.driver,
+                        &driver_attr_support_poll_for_event);
+        driver_remove_file(&megasas_pci_driver.driver,
+                        &driver_attr_support_device_change);
+        driver_remove_file(&megasas_pci_driver.driver,
                            &driver_attr_release_date);
         driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);