staging: most: aim-cdev: destroy ida struct in case of exception

This patch is needed to clean up the initialized ida structure in case
the function exits with an exception.

Signed-off-by: Christian Gromm <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/most/aim-cdev/cdev.c

···
 
 	err = alloc_chrdev_region(&aim_devno, 0, 50, "cdev");
 	if (err < 0)
-		return err;
+		goto dest_ida;
 	major = MAJOR(aim_devno);
 
 	aim_class = class_create(THIS_MODULE, "most_cdev_aim");
···
 	class_destroy(aim_class);
 free_cdev:
 	unregister_chrdev_region(aim_devno, 1);
+dest_ida:
+	ida_destroy(&minor_id);
 	return err;
 }