linux-kernel - RE: [PATCH 1/7] hv: acquire vmbus_connection.channel_mutex in vmbus_free

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Date:   Mon, 28 Nov 2016 06:20:41 +0000
From:   Dexuan Cui <decui@...rosoft.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "KY Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <stephen@...workplumber.org>
Subject: RE: [PATCH 1/7] hv: acquire vmbus_connection.channel_mutex in
 vmbus_free_channels()

> From: Vitaly Kuznetsov [mailto:vkuznets@...hat.com]
> Sent: Friday, November 25, 2016 20:49
> To: devel@...uxdriverproject.org
> Cc: linux-kernel@...r.kernel.org; KY Srinivasan <kys@...rosoft.com>; Haiyang
> Zhang <haiyangz@...rosoft.com>; Dexuan Cui <decui@...rosoft.com>;
> Stephen Hemminger <stephen@...workplumber.org>
> Subject: [PATCH 1/7] hv: acquire vmbus_connection.channel_mutex in
> vmbus_free_channels()
> 
> "kernel BUG at drivers/hv/channel_mgmt.c:350!" is observed when hv_vmbus
> module is unloaded. BUG_ON() was introduced in commit 85d9aa705184
> ("Drivers: hv: vmbus: add an API vmbus_hvsock_device_unregister()") as
> vmbus_free_channels() codepath was apparently forgotten.
> 
> Fixes: 85d9aa705184 ("Drivers: hv: vmbus: add an API
> vmbus_hvsock_device_unregister()")
> Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>

Reviewed-by: Dexuan Cui <decui@...rosoft.com>

Thanks for the fix!

-- Dexuan