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nvmf/vfio-user: don't unmap commands without data buffers

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libvfio-user will assert if the command didn't have data
buffers.

Fix issue #2124.

Change-Id: I43e9562c614bc65e54dbf650447369317c10f7b5
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9264
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Dong Yi <dongx.yi@intel.com>
Reviewed-by: Thanos Makatos <thanos.makatos@nutanix.com>
Reviewed-by: John Levon <levon@movementarian.org>
This commit is contained in:
Changpeng Liu 2021-08-24 17:47:29 +08:00
parent a89d15e46a
commit e72453b39f
1 changed files with 3 additions and 1 deletions
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4
lib/nvmf/vfio_user.c
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@ -1328,7 +1328,9 @@ handle_cmd_rsp(struct nvmf_vfio_user_req *vu_req, void *cb_arg)
assert(vu_req != NULL);
assert(vu_ctrlr != NULL);
vfu_unmap_sg(vu_ctrlr->endpoint->vfu_ctx, vu_req->sg, vu_req->iov, vu_req->iovcnt);
if (spdk_likely(vu_req->iovcnt)) {
vfu_unmap_sg(vu_ctrlr->endpoint->vfu_ctx, vu_req->sg, vu_req->iov, vu_req->iovcnt);
}
sqid = vu_qpair->qpair.qid;
cqid = vu_ctrlr->qp[sqid]->sq.cqid;