virtio-blk: use virtqueue_add_sgs on bio path

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(This is a respin of Paolo Bonzini's patch, but it calls
virtqueue_add_sgs() instead of his multi-part API).

Move the creation of the request header and response footer to
__virtblk_add_req.  vbr->sg only contains the data scatterlist,
the header/footer are added separately using virtqueue_add_sgs().

With this change, virtio-blk (with use_bio) is not relying anymore on
the virtio functions ignoring the end markers in a scatterlist.
The next patch will do the same for the other path.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Reviewed-by: Asias He <asias@redhat.com>

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Paolo Bonzini 2013-03-20 15:44:27 +10:30 • committed by Rusty Russell

parent 5ee21a52c0

commit 8f39db9d37

1 changed files with 29 additions and 29 deletions

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drivers/block/virtio_blk.c

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