virtio: Tell the user what went wrong when event_notifier_init failed
commita8bba0ada41b228e4dd5113a02f20bbc0f5d6f0a
authorThomas Huth <thuth@redhat.com>
Mon, 27 Jun 2016 22:12:03 +0000 (28 00:12 +0200)
committerMichael S. Tsirkin <mst@redhat.com>
Fri, 9 Sep 2016 17:58:34 +0000 (9 20:58 +0300)
treebf109deb32d9ada555a0c75e4d7ae648744274f5
parentc2a57aae9a1c3dd7de77daf5478df10379aeeebf
virtio: Tell the user what went wrong when event_notifier_init failed

event_notifier_init() can fail in real life, for example when there
are not enough open file handles available (EMFILE) when using a lot
of devices. So instead of leaving the average user with a cryptic
error number only, print out a proper error message with strerror()
instead, so that the user has a better way to figure out what is
going on and that using "ulimit -n" might help here for example.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
hw/virtio/virtio-bus.c