Commit 60c03153 authored by Artem Bityutskiy's avatar Artem Bityutskiy
Browse files

UBI: handle zero-length case 



ubi_eba_atomic_leb_change() has to just map the LEB to a free PEB
if data length is zero.

Signed-off-by: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
parent 1b68d0ee

drivers/mtd/ubi/eba.c

+11 −0
Original line number Diff line number Diff line
@@ -862,6 +862,17 @@ int ubi_eba_atomic_leb_change(struct ubi_device *ubi, struct ubi_volume *vol, 
	if (ubi->ro_mode)

		return -EROFS;



	if (len == 0) {

		/*

		 * Special case when data length is zero. In this case the LEB

		 * has to be unmapped and mapped somewhere else.

		 */

		err = ubi_eba_unmap_leb(ubi, vol, lnum);

		if (err)

			return err;

		return ubi_eba_write_leb(ubi, vol, lnum, NULL, 0, 0, dtype);

	}



	vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);

	if (!vid_hdr)

		return -ENOMEM;