Commit 32be3c01 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

zloop: fix write pointer calculation in zloop_forget_cache 



The write pointer is absolute and in sector units, so we need to
convert it to a relative byte address first.

Fixes: c505448748f7 ("zloop: forget write cache on force removal")
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDamien Le Moal <dlemoal@kernel.org>
Reviewed-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://patch.msgid.link/20260414081811.549755-2-hch@lst.de


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 5bdb4078

drivers/block/zloop.c

+11 −2
Original line number Diff line number Diff line
@@ -1401,8 +1401,17 @@ static void zloop_forget_cache(struct zloop_device *zlo) 
				zlo->disk->part0, ret);

			continue;

		}

		if (old_wp < zone->wp)

			zloop_truncate(file, old_wp);



		if (old_wp > zone->wp)

			continue;

		/*

		 * This should not happen, if we recored a full zone, it can't

		 * be active.

		 */

		if (WARN_ON_ONCE(old_wp == ULLONG_MAX))

			continue;



		zloop_truncate(file, (old_wp - zone->start) << SECTOR_SHIFT);

	}

}