diff options
Diffstat (limited to 'drivers/block/xen-blkfront.c')
| -rw-r--r-- | drivers/block/xen-blkfront.c | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 6af250113c2..2bdebcb3ff1 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -186,31 +186,30 @@ static int blkif_queue_request(struct request *req) ring_req->nr_segments = 0; rq_for_each_segment(bvec, req, iter) { - BUG_ON(ring_req->nr_segments - == BLKIF_MAX_SEGMENTS_PER_REQUEST); - buffer_mfn = pfn_to_mfn(page_to_pfn(bvec->bv_page)); - fsect = bvec->bv_offset >> 9; - lsect = fsect + (bvec->bv_len >> 9) - 1; - /* install a grant reference. */ - ref = gnttab_claim_grant_reference(&gref_head); - BUG_ON(ref == -ENOSPC); - - gnttab_grant_foreign_access_ref( + BUG_ON(ring_req->nr_segments == BLKIF_MAX_SEGMENTS_PER_REQUEST); + buffer_mfn = pfn_to_mfn(page_to_pfn(bvec->bv_page)); + fsect = bvec->bv_offset >> 9; + lsect = fsect + (bvec->bv_len >> 9) - 1; + /* install a grant reference. */ + ref = gnttab_claim_grant_reference(&gref_head); + BUG_ON(ref == -ENOSPC); + + gnttab_grant_foreign_access_ref( ref, info->xbdev->otherend_id, buffer_mfn, rq_data_dir(req) ); - info->shadow[id].frame[ring_req->nr_segments] = + info->shadow[id].frame[ring_req->nr_segments] = mfn_to_pfn(buffer_mfn); - ring_req->seg[ring_req->nr_segments] = + ring_req->seg[ring_req->nr_segments] = (struct blkif_request_segment) { .gref = ref, .first_sect = fsect, .last_sect = lsect }; - ring_req->nr_segments++; + ring_req->nr_segments++; } info->ring.req_prod_pvt++; |