From eec70897d81bb2913e22c6792ea2739faf59c3e1 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Thu, 20 Feb 2014 00:52:01 +0000 Subject: [PATCH] bio-integrity: Drop bio_integrity_verify BUG_ON in post bip->bip_iter world Given that bip->bip_iter.bi_size is decremented after bio_advance() -> bio_integrity_advance() is called, the BUG_ON() in bio_integrity_verify() ends up tripping in v3.14-rc1 code with the advent of immutable biovecs in: commit d57a5f7c6605f15f3b5134837e68b448a7cea88e Author: Kent Overstreet Date: Sat Nov 23 17:20:16 2013 -0800 bio-integrity: Convert to bvec_iter Given that there is no easy way to ascertain the original bi_size value, go ahead and drop this BUG_ON(). Reported-by: Sagi Grimberg Reported-by: Akinobu Mita Acked-by: Martin K. Petersen Cc: Kent Overstreet Signed-off-by: Nicholas Bellinger Signed-off-by: Jens Axboe --- fs/bio-integrity.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c index 0129b78..4f70f38 100644 --- a/fs/bio-integrity.c +++ b/fs/bio-integrity.c @@ -458,11 +458,10 @@ static int bio_integrity_verify(struct bio *bio) struct blk_integrity_exchg bix; struct bio_vec *bv; sector_t sector = bio->bi_integrity->bip_iter.bi_sector; - unsigned int sectors, total, ret; + unsigned int sectors, ret = 0; void *prot_buf = bio->bi_integrity->bip_buf; int i; - ret = total = 0; bix.disk_name = bio->bi_bdev->bd_disk->disk_name; bix.sector_size = bi->sector_size; @@ -484,8 +483,6 @@ static int bio_integrity_verify(struct bio *bio) sectors = bv->bv_len / bi->sector_size; sector += sectors; prot_buf += sectors * bi->tuple_size; - total += sectors * bi->tuple_size; - BUG_ON(total > bio->bi_integrity->bip_iter.bi_size); kunmap_atomic(kaddr); } -- 2.7.4