The block layer will not be able to handle integrity for dma-direct bios seeing it does not have access to the underlying data.
If users of dma-direct require integrity, they will have to handle it in the layer creating the bios. This is left as future work should somebody care about handling such a case. Thus, bio_integrity_prep() should ignore dma-direct bios. Signed-off-by: Logan Gunthorpe <[email protected]> --- block/bio-integrity.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/block/bio-integrity.c b/block/bio-integrity.c index 4db620849515..10fdf456fcd8 100644 --- a/block/bio-integrity.c +++ b/block/bio-integrity.c @@ -221,6 +221,10 @@ bool bio_integrity_prep(struct bio *bio) if (bio_integrity(bio)) return true; + /* The block layer cannot handle integrity for dma-direct bios */ + if (bio_is_dma_direct(bio)) + return true; + if (bio_data_dir(bio) == READ) { if (!bi->profile->verify_fn || !(bi->flags & BLK_INTEGRITY_VERIFY)) -- 2.20.1
