From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: devel@linuxdriverproject.org
Cc: "K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH] Drivers: hv: vmbus: don't send CHANNELMSG_UNLOAD on pre-Win2012R2 hosts
Date: Wed, 1 Jul 2015 12:30:17 +0200 [thread overview]
Message-ID: <1435746617-24954-1-git-send-email-vkuznets@redhat.com> (raw)
Pre-Win2012R2 hosts don't properly handle CHANNELMSG_UNLOAD and
wait_for_completion() hangs. Avoid sending such request on old hosts.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
drivers/hv/channel_mgmt.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 4506a66..00ba3f3 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -469,6 +469,10 @@ void vmbus_initiate_unload(void)
{
struct vmbus_channel_message_header hdr;
+ /* Pre-Win2012R2 hosts don't support reconnect */
+ if (vmbus_proto_version < VERSION_WIN8_1)
+ return;
+
init_completion(&vmbus_connection.unload_event);
memset(&hdr, 0, sizeof(struct vmbus_channel_message_header));
hdr.msgtype = CHANNELMSG_UNLOAD;
--
2.4.3
reply other threads:[~2015-07-01 10:30 UTC|newest]
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