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kernel: add a ubi forced detach ioctl

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Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 40417
This commit is contained in:
John Crispin 2014-04-07 15:10:18 +00:00
parent 1d5ac95850
commit 1978620045
1 changed files with 41 additions and 0 deletions
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41
target/linux/generic/patches-3.10/413-mtd-ubi-forced-detach.patch Normal file
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@ -0,0 +1,41 @@
--- 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 */