+++ /dev/null
---- a/drivers/mtd/ubi/cdev.c
-+++ b/drivers/mtd/ubi/cdev.c
-@@ -974,7 +974,7 @@ static long ubi_cdev_ioctl(struct file *
- static long ctrl_cdev_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
- {
-- int err = 0;
-+ int err = 0, force = 0;
- void __user *argp = (void __user *)arg;
-
- if (!capable(CAP_SYS_RESOURCE))
-@@ -1024,6 +1024,10 @@ static long ctrl_cdev_ioctl(struct file
- }
-
- /* Detach an MTD device command */
-+ case UBI_IOCFDET:
-+ force = 1;
-+ /* no break */
-+
- case UBI_IOCDET:
- {
- int ubi_num;
-@@ -1036,7 +1040,7 @@ static long ctrl_cdev_ioctl(struct file
- }
-
- mutex_lock(&ubi_devices_mutex);
-- err = ubi_detach_mtd_dev(ubi_num, 0);
-+ err = ubi_detach_mtd_dev(ubi_num, force);
- mutex_unlock(&ubi_devices_mutex);
- break;
- }
---- a/include/uapi/mtd/ubi-user.h
-+++ b/include/uapi/mtd/ubi-user.h
-@@ -168,6 +168,7 @@
- #define UBI_IOCATT _IOW(UBI_CTRL_IOC_MAGIC, 64, struct ubi_attach_req)
- /* Detach an MTD device */
- #define UBI_IOCDET _IOW(UBI_CTRL_IOC_MAGIC, 65, __s32)
-+#define UBI_IOCFDET _IOW(UBI_CTRL_IOC_MAGIC, 99, __s32)
-
- /* ioctl commands of UBI volume character devices */
-