udf: don't bother with full-page write optimisations in adinicb case

... it would get converted to regular if such had been attempted
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/udf/file.c

@@ -105,11 +105,25 @@ static ssize_t udf_adinicb_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 	return 0;
 }
 
+static int udf_adinicb_write_end(struct file *file, struct address_space *mapping,
+				 loff_t pos, unsigned len, unsigned copied,
+				 struct page *page, void *fsdata)
+{
+	struct inode *inode = page->mapping->host;
+	loff_t last_pos = pos + copied;
+	if (last_pos > inode->i_size)
+		i_size_write(inode, last_pos);
+	set_page_dirty(page);
+	unlock_page(page);
+	put_page(page);
+	return copied;
+}
+
 const struct address_space_operations udf_adinicb_aops = {
 	.readpage	= udf_adinicb_readpage,
 	.writepage	= udf_adinicb_writepage,
 	.write_begin	= udf_adinicb_write_begin,
-	.write_end	= simple_write_end,
+	.write_end	= udf_adinicb_write_end,
 	.direct_IO	= udf_adinicb_direct_IO,
 };