From: Vitaly Kuznetsov Date: Thu, 6 Nov 2014 17:21:25 +0000 (+0100) Subject: Drivers: hv: kvp,vss: Fast propagation of userspace communication failure X-Git-Tag: omap-for-v3.19/fixes-rc1~84^2~25 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8d9560ebcc6448472b3afe8f36f37d6b0de8f5a4;p=pandora-kernel.git Drivers: hv: kvp,vss: Fast propagation of userspace communication failure If we fail to send a message to userspace daemon with cn_netlink_send() there is no need to wait for userspace to reply as it is not going to happen. This happens when kvp or vss daemon is stopped after a successful handshake. Report HV_E_FAIL immediately and cancel the timeout job so host won't receive two failures. Use pr_warn() for VSS and pr_debug() for KVP deliberately as VSS request are rare and result in a failed backup. KVP requests are much more frequent after a successful handshake so avoid flooding logs. It would be nice to have an ability to de-negotiate with the host in case userspace daemon gets disconnected so we won't receive new requests. But I'm not sure it is possible. Signed-off-by: Vitaly Kuznetsov Signed-off-by: Greg Kroah-Hartman --- Reading git-diff-tree failed