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-rw-r--r--drivers/mtd/ubi/cdev.c14
-rw-r--r--include/mtd/ubi-user.h2
2 files changed, 16 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index fd7e0f923b38..9ddbade72887 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -546,6 +546,20 @@ static int vol_cdev_ioctl(struct inode *inode, struct file *file,
err = ubi_leb_unmap(desc, lnum);
break;
}
+
+ /* Check if logical eraseblock is mapped command */
+ case UBI_IOCEBISMAP:
+ {
+ int32_t lnum;
+
+ err = get_user(lnum, (__user int32_t *)argp);
+ if (err) {
+ err = -EFAULT;
+ break;
+ }
+ err = ubi_is_mapped(desc, lnum);
+ break;
+ }
#endif
default:
diff --git a/include/mtd/ubi-user.h b/include/mtd/ubi-user.h
index ee2ea2e224af..5828d7879199 100644
--- a/include/mtd/ubi-user.h
+++ b/include/mtd/ubi-user.h
@@ -137,6 +137,8 @@
#define UBI_IOCEBMAP _IOW(UBI_VOL_IOC_MAGIC, 3, struct ubi_map_req)
/* Unmap an eraseblock, used for debugging, disabled by default */
#define UBI_IOCEBUNMAP _IOW(UBI_VOL_IOC_MAGIC, 4, int32_t)
+/* Check if an eraseblock is mapped, used for debugging, disabled by default */
+#define UBI_IOCEBISMAP _IOR(UBI_VOL_IOC_MAGIC, 5, int32_t)
/* Maximum MTD device name length supported by UBI */
#define MAX_UBI_MTD_NAME_LEN 127