vol->usable_size is already set to ubi->leb_size - vol->data_pad. Use
vol->usable_size instead of recalculating it.

Signed-off-by: Boris Brezillon <boris.brezil...@free-electrons.com>
---
 drivers/mtd/ubi/cdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index ee2b74d1d1b5..3490dcd99ad1 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -416,7 +416,7 @@ static long vol_cdev_ioctl(struct file *file, unsigned int 
cmd,
                }
 
                rsvd_bytes = (long long)vol->reserved_pebs *
-                                       ubi->leb_size-vol->data_pad;
+                                       vol->usable_leb_size;
                if (bytes < 0 || bytes > rsvd_bytes) {
                        err = -EINVAL;
                        break;
-- 
2.7.4

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