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block/xen-blkfront: Remove invalid comment 

Since commit b764915 "xen-blkfront: use a different scatterlist for each
request", biovec has been replaced by scatterlist when copying back the
data during a completion request.

Signed-off-by: Julien Grall <julien.grall@citrix.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Julien Grall 2015-06-17 15:28:07 +01:00 committed by David Vrabel
parent db26a68695
commit ee4b7179fc
1 changed files with 0 additions and 6 deletions
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6
drivers/block/xen-blkfront.c
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@ -1056,12 +1056,6 @@ static void blkif_completion(struct blk_shadow *s, struct blkfront_info *info,
s->req.u.indirect.nr_segments : s->req.u.rw.nr_segments; s->req.u.indirect.nr_segments : s->req.u.rw.nr_segments;
if (bret->operation == BLKIF_OP_READ && info->feature_persistent) { if (bret->operation == BLKIF_OP_READ && info->feature_persistent) {
/*
* Copy the data received from the backend into the bvec.
* Since bv_offset can be different than 0, and bv_len different
* than PAGE_SIZE, we have to keep track of the current offset,
* to be sure we are copying the data from the right shared page.
*/
for_each_sg(s->sg, sg, nseg, i) { for_each_sg(s->sg, sg, nseg, i) {
BUG_ON(sg->offset + sg->length > PAGE_SIZE); BUG_ON(sg->offset + sg->length > PAGE_SIZE);
shared_data = kmap_atomic( shared_data = kmap_atomic(