tree 4ac43a279beeb7504ef2b4216a549fafe67d1b19
parent 79c14141a487211d1bb7840d3f607766f6115dd2
author Nicholas Bellinger <nab@linux-iscsi.org> 1422580873 -0800
committer Nicholas Bellinger <nab@linux-iscsi.org> 1423076135 -0800

vhost/scsi: Fix incorrect early vhost_scsi_handle_vq failures

This patch fixes vhost_scsi_handle_vq() failure cases that result in BUG_ON()
getting triggered when vhost_scsi_free_cmd() is called, and ->tvc_se_cmd has
not been initialized by target_submit_cmd_map_sgls().

It changes tcm_vhost_release_cmd() to use tcm_vhost_cmd->tvc_nexus for obtaining
se_session pointer reference.  Also, avoid calling put_page() on NULL sg->page
entries in vhost_scsi_map_to_sgl() failure path.

Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>