UBI: add fsync capability

Now, we can call fsync() on an UBI volume.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index e63c8fc3df3a..f8e0f68f2186 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -186,6 +186,16 @@ static loff_t vol_cdev_llseek(struct file *file, loff_t offset, int origin)
         return new_offset;
 }
 
+static int vol_cdev_fsync(struct file *file, struct dentry *dentry,
+                          int datasync)
+{
+        struct ubi_volume_desc *desc = file->private_data;
+        struct ubi_device *ubi = desc->vol->ubi;
+
+        return ubi_sync(ubi->ubi_num);
+}
+
+
 static ssize_t vol_cdev_read(struct file *file, __user char *buf, size_t count,
                              loff_t *offp)
 {
@@ -1073,6 +1083,7 @@ const struct file_operations ubi_vol_cdev_operations = {
         .llseek         = vol_cdev_llseek,
         .read           = vol_cdev_read,
         .write          = vol_cdev_write,
+        .fsync          = vol_cdev_fsync,
         .unlocked_ioctl = vol_cdev_ioctl,
         .compat_ioctl   = vol_cdev_compat_ioctl,
 };