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authorRoss Lagerwall <ross.lagerwall@citrix.com>2017-02-08 13:57:37 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-12-10 00:01:54 +0300
commit017a499be5746df215a664775b14e80c087bc941 (patch)
treee4f88c23634ccda6f0bf080a3bc43641faaf3cbd /arch/ia64/sn
parentc93c09a057b71fa152de9d56f971fd82248d6499 (diff)
downloadlinux-017a499be5746df215a664775b14e80c087bc941.tar.xz
xen-netfront: Improve error handling during initialization
[ Upstream commit e2e004acc7cbe3c531e752a270a74e95cde3ea48 ] This fixes a crash when running out of grant refs when creating many queues across many netdevs. * If creating queues fails (i.e. there are no grant refs available), call xenbus_dev_fatal() to ensure that the xenbus device is set to the closed state. * If no queues are created, don't call xennet_disconnect_backend as netdev->real_num_tx_queues will not have been set correctly. * If setup_netfront() fails, ensure that all the queues created are cleaned up, not just those that have been set up. * If any queues were set up and an error occurs, call xennet_destroy_queues() to clean up the napi context. * If any fatal error occurs, unregister and destroy the netdev to avoid leaving around a half setup network device. Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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