tree 30d7c7dd5987be4185943de23db686027e1a0867
parent 73a99f083009d67d8e12603420e008d5c21b0b7d
author Michael S. Tsirkin <mst@redhat.com> 1266917123 +0200
committer Michael S. Tsirkin <mst@redhat.com> 1267378956 +0200

vhost: fix get_user_pages_fast error handling

get_user_pages_fast returns number of pages on success, negative value
on failure, but never 0. Fix vhost code to match this logic.

Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>