tree 2d4a96bdba6a2cbeda4c7d384b5783b90ac59956
parent 5bd6ccd9c95fdf068e125e08992c7424eb2ceabb
author Vitaly Kuznetsov <vkuznets@redhat.com> 1480797272 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1483947138 +0100

hv: acquire vmbus_connection.channel_mutex in vmbus_free_channels()

commit abd1026da4a7700a8db370947f75cd17b6ae6f76 upstream.

"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@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>