From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Sun, 12 Apr 2015 01:07:40 +0000 (-0700)
Subject: Drivers: hv: kvp: reset kvp_context
X-Git-Tag: v4.1.12-92~196^2~83
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=de4dcb3b9ecd8f69e9865f03c65c245c4cdc3913;p=users%2Fjedix%2Flinux-maple.git

Drivers: hv: kvp: reset kvp_context

We set kvp_context when we want to postpone receiving a packet from vmbus due
to the previous transaction being unfinished. We, however, never reset this
state, all consequent kvp_respond_to_host() calls will result in poll_channel()
calling hv_kvp_onchannelcallback(). This doesn't cause real issues as:
1) Host is supposed to serialize transactions as well
2) If no message is pending vmbus_recvpacket() will return 0 recvlen.
This is just a cleanup.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: Alex Ng <alexng@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 5fa97480b9b125bb9bdb446930289b3274ed7eb7)

Orabug: 21886720
Signed-off-by: Jason Luo <zhangqing.luo@oracle.com>
---

diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c
index beb8105c0e7ba..2152872d9e350 100644
--- a/drivers/hv/hv_kvp.c
+++ b/drivers/hv/hv_kvp.c
@@ -620,6 +620,7 @@ void hv_kvp_onchannelcallback(void *context)
 		kvp_transaction.kvp_context = context;
 		return;
 	}
+	kvp_transaction.kvp_context = NULL;
 
 	vmbus_recvpacket(channel, recv_buffer, PAGE_SIZE * 4, &recvlen,
 			 &requestid);