Merge tag 'iomap-6.5-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull iomap fix from Darrick Wong:
 "Fix partial write regression.

  It turns out that fstests doesn't have any test coverage for short
  writes, but LTP does. Fortunately, this was caught right after -rc1
  was tagged.

  Summary:

   - Fix a bug wherein a failed write could clobber short write status"

* tag 'iomap-6.5-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  iomap: micro optimize the ki_pos assignment in iomap_file_buffered_write
  iomap: fix a regression for partial write errors

Author: torvalds

fs/iomap/buffered-io.c

@@ -872,10 +872,10 @@ iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *i,
 	while ((ret = iomap_iter(&iter, ops)) > 0)
 		iter.processed = iomap_write_iter(&iter, i);
 
-	if (unlikely(ret < 0))
+	if (unlikely(iter.pos == iocb->ki_pos))
 		return ret;
 	ret = iter.pos - iocb->ki_pos;
-	iocb->ki_pos += ret;
+	iocb->ki_pos = iter.pos;
 	return ret;
 }
 EXPORT_SYMBOL_GPL(iomap_file_buffered_write);