Commit beeea636 authored by Artem Bityutskiy's avatar Artem Bityutskiy
Browse files

UBI: add a comment 



It is not clear why we schedule PEB for scrubbing in case of
-EBADMSG. Elaborate.

Requested-by: default avatarKyungmin Park <kmpark@infradead.org>
Signed-off-by: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
parent 979c9296

drivers/mtd/ubi/vtbl.c

+10 −1
Original line number Diff line number Diff line
@@ -385,7 +385,16 @@ static struct ubi_vtbl_record *process_lvol(struct ubi_device *ubi, 
		err = ubi_io_read_data(ubi, leb[seb->lnum], seb->pnum, 0,

				       ubi->vtbl_size);

		if (err == UBI_IO_BITFLIPS || err == -EBADMSG)

			/* Scrub the PEB later */

			/*

			 * Scrub the PEB later. Note, -EBADMSG indicates an

			 * uncorrectable ECC error, but we have our own CRC and

			 * the data will be checked later. If the data is OK,

			 * the PEB will be scrubbed (because we set

			 * seb->scrub). If the data is not OK, the contents of

			 * the PEB will be recovered from the second copy, and

			 * seb->scrub will be cleared in

			 * 'ubi_scan_add_used()'.

			 */

			seb->scrub = 1;

		else if (err)

			goto out_free;