diff options
| author | Dexuan Cui <decui@microsoft.com> | 2020-01-19 15:29:22 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-11 15:32:33 +0200 |
| commit | 0a3172f9c571ce8cf79a399c2d602be95fd9229c (patch) | |
| tree | 0f2e79019e466e159c8d6653439945e47b9ab02d /include | |
| parent | b5650e4f6430f23dcb412a02dc1e9ba572f1b24d (diff) | |
Drivers: hv: vmbus: Ignore CHANNELMSG_TL_CONNECT_RESULT(23)
[ Upstream commit ddc9d357b991838c2d975e8d7e4e9db26f37a7ff ]
When a Linux hv_sock app tries to connect to a Service GUID on which no
host app is listening, a recent host (RS3+) sends a
CHANNELMSG_TL_CONNECT_RESULT (23) message to Linux and this triggers such
a warning:
unknown msgtype=23
WARNING: CPU: 2 PID: 0 at drivers/hv/vmbus_drv.c:1031 vmbus_on_msg_dpc
Actually Linux can safely ignore the message because the Linux app's
connect() will time out in 2 seconds: see VSOCK_DEFAULT_CONNECT_TIMEOUT
and vsock_stream_connect(). We don't bother to make use of the message
because: 1) it's only supported on recent hosts; 2) a non-trivial effort
is required to use the message in Linux, but the benefit is small.
So, let's not see the warning by silently ignoring the message.
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/hyperv.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index c43e694fef7d..35461d49d3ae 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -428,6 +428,8 @@ enum vmbus_channel_message_type { CHANNELMSG_19 = 19, CHANNELMSG_20 = 20, CHANNELMSG_TL_CONNECT_REQUEST = 21, + CHANNELMSG_22 = 22, + CHANNELMSG_TL_CONNECT_RESULT = 23, CHANNELMSG_COUNT }; |