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authorNicholas Bellinger <nab@linux-iscsi.org>2014-01-21 20:32:05 -0800
committerJens Axboe <axboe@kernel.dk>2014-01-21 20:32:05 -0800
commit5837c80e870bc3b12ac6a98cdc9ce7a9522a8fb6 (patch)
tree35b9a82820cf87bb133d4773e416a8d3b293b604 /block
parentbca266b3886b8bc587db044750c8a00d674b4d09 (diff)
bio-integrity: Fix bio_integrity_verify segment start bug
This patch addresses a bug in bio_integrity_verify() code that has been causing DIF READ verify operations to be silently skipped. The issue is that bio->bi_idx will have been incremented within bio_advance() code in the normal blk_update_request() -> req_bio_endio() completion path, and bio_integrity_verify() is using bio_for_each_segment() which starts the bio segment walk at the current bio->bi_idx. So instead use bio_for_each_segment_all() to always start the bio segment walk from zero, regardless of the current bio->bi_idx value after bio_advance() has been called. Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Cc: stable@kernel.dk # >= v3.10 Signed-off-by: Jens Axboe <axboe@kernel.dk>
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