generic_file_direct_write(): switch to iov_iter

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 4 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index ae6af072b635..9fe20c2052af 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1669,15 +1669,13 @@ static ssize_t __btrfs_direct_write(struct kiocb *iocb,
         loff_t endbyte;
         int err;
 
-        written = generic_file_direct_write(iocb, iov, &nr_segs, pos,
-                                            count, ocount);
+        iov_iter_init(&i, iov, nr_segs, count, 0);
+        written = generic_file_direct_write(iocb, &i, pos, count, ocount);
 
         if (written < 0 || written == count)
                 return written;
 
         pos += written;
-        count -= written;
-        iov_iter_init(&i, iov, nr_segs, count, written);
         written_buffered = __btrfs_buffered_write(file, &i, pos);
         if (written_buffered < 0) {
                 err = written_buffered;