megaraid_sas : Add release date and update driver version

This patch will upgrade the driver version and add back the release date and
sysfs hook for the same.  Some internal applications uses sysfs parameter for
release date, so they were broken because of removal of release date from
sysfs.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>

drivers/scsi/megaraid/megaraid_sas.h

@@ -35,7 +35,8 @@
 /*
  * MegaRAID SAS Driver meta data
  */
-#define MEGASAS_VERSION				"06.806.08.00-rc1"
+#define MEGASAS_VERSION				"06.807.10.00-rc1"
+#define MEGASAS_RELDATE				"March 6, 2015"
 
 /*
  * Device IDs

drivers/scsi/megaraid/megaraid_sas_base.c

@@ -6422,6 +6422,15 @@ static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
 
 static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
 
+static ssize_t
+megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
+{
+	return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
+		MEGASAS_RELDATE);
+}
+
+static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date, NULL);
+
 static ssize_t
 megasas_sysfs_show_support_poll_for_event(struct device_driver *dd, char *buf)
 {
@@ -6761,6 +6770,11 @@ static int __init megasas_init(void)
 	if (rval)
 		goto err_dcf_attr_ver;
 
+	rval = driver_create_file(&megasas_pci_driver.driver,
+				  &driver_attr_release_date);
+	if (rval)
+		goto err_dcf_rel_date;
+
 	rval = driver_create_file(&megasas_pci_driver.driver,
 				&driver_attr_support_poll_for_event);
 	if (rval)
@@ -6784,6 +6798,9 @@ static int __init megasas_init(void)
 	driver_remove_file(&megasas_pci_driver.driver,
 			&driver_attr_support_poll_for_event);
 err_dcf_support_poll_for_event:
+	driver_remove_file(&megasas_pci_driver.driver,
+			   &driver_attr_release_date);
+err_dcf_rel_date:
 	driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
 err_dcf_attr_ver:
 	pci_unregister_driver(&megasas_pci_driver);
@@ -6803,6 +6820,8 @@ static void __exit megasas_exit(void)
 			&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);
 
 	pci_unregister_driver(&megasas_pci_driver);