staging: unisys: use local variable in cleanup

the dev_t was being stored in visorchipset_platform_device.dev.devt
while initializing the module. so pass that value as an argument to
cleanup() so that it can use this local variable instead of the global
variable.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorchipset/file.c

@@ -73,13 +73,13 @@ visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel)
 }
 
 void
-visorchipset_file_cleanup(void)
+visorchipset_file_cleanup(dev_t major_dev)
 {
 	if (file_cdev.ops != NULL)
 		cdev_del(&file_cdev);
 	file_cdev.ops = NULL;
-	if (MAJOR(majordev) >= 0) {
-		unregister_chrdev_region(majordev, 1);
+	if (MAJOR(major_dev) >= 0) {
+		unregister_chrdev_region(major_dev, 1);
 		majordev = MKDEV(0, 0);
 	}
 }

drivers/staging/unisys/visorchipset/file.h

@@ -22,6 +22,6 @@
 
 int visorchipset_file_init(dev_t majorDev,
 			   struct visorchannel **pControlVm_channel);
-void visorchipset_file_cleanup(void);
+void visorchipset_file_cleanup(dev_t major_dev);
 
 #endif

drivers/staging/unisys/visorchipset/visorchipset_main.c

@@ -2278,7 +2278,7 @@ visorchipset_exit(void)
 
 	visorchannel_destroy(controlvm_channel);
 
-	visorchipset_file_cleanup();
+	visorchipset_file_cleanup(visorchipset_platform_device.dev.devt);
 	POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO);
 }