UBI: improve error messages

Always print error code with error messages, sometimes it is
extremely helpful info.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index 9771e7f410c1..12777da47d3b 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -377,7 +377,8 @@ static ssize_t vol_cdev_write(struct file *file, const char __user *buf,
 
         err = ubi_more_update_data(ubi, vol->vol_id, buf, count);
         if (err < 0) {
-                ubi_err("cannot write %zd bytes of update data", count);
+                ubi_err("cannot write %zd bytes of update data, error %d",
+                        count, err);
                 return err;
         }