From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752685AbbCJCbU (ORCPT ); Mon, 9 Mar 2015 22:31:20 -0400 Received: from p3plsmtps2ded02.prod.phx3.secureserver.net ([208.109.80.59]:53148 "EHLO p3plsmtps2ded02.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751612AbbCJCbT (ORCPT ); Mon, 9 Mar 2015 22:31:19 -0400 x-originating-ip: 72.167.245.219 From: "K. Y. Srinivasan" To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com Cc: "K. Y. Srinivasan" Subject: [PATCH 1/1] Drivers: hv: vmbus: Fix a bug in rescind processing in vmbus_close_internal() Date: Mon, 9 Mar 2015 20:47:11 -0700 Message-Id: <1425959231-24527-1-git-send-email-kys@microsoft.com> X-Mailer: git-send-email 1.7.4.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When a channel has been rescinded, the close operation is a noop. Restructure the code so we deal with the rescind condition after we properly cleanup the channel. I would like to thank Dexuan Cui for observing this problem. The current code leaks memory when the channel is rescinded. Signed-off-by: K. Y. Srinivasan --- drivers/hv/channel.c | 15 ++++++--------- 1 files changed, 6 insertions(+), 9 deletions(-) diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index e58cdb7..fddd3b5 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -501,15 +501,6 @@ static int vmbus_close_internal(struct vmbus_channel *channel) put_cpu(); } - /* - * If the channel has been rescinded; process device removal. - */ - if (channel->rescind) { - hv_process_channel_removal(channel, - channel->offermsg.child_relid); - return 0; - } - /* Send a closing message */ msg = &channel->close_msg.msg; @@ -549,6 +540,12 @@ static int vmbus_close_internal(struct vmbus_channel *channel) free_pages((unsigned long)channel->ringbuffer_pages, get_order(channel->ringbuffer_pagecount * PAGE_SIZE)); + /* + * If the channel has been rescinded; process device removal. + */ + if (channel->rescind) + hv_process_channel_removal(channel, + channel->offermsg.child_relid); return ret; } -- 1.7.4.1