This is a note to let you know that I've just added the patch titled vmbus: re-enable channel tasklet to the 4.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: vmbus-re-enable-channel-tasklet.patch and it can be found in the queue-4.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 6463a4571ceefc43908df4b016d8d5d8b8e85357 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx> Date: Sun, 25 Jun 2017 12:47:46 -0700 Subject: vmbus: re-enable channel tasklet From: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx> commit 6463a4571ceefc43908df4b016d8d5d8b8e85357 upstream. This problem shows up in 4.11 when netvsc driver is removed and reloaded. The problem is that the channel is closed during module removal and the tasklet for processing responses is disabled. When module is reloaded the channel is reopened but the tasklet is marked as disabled. The fix is to re-enable tasklet at the end of close which gets it back to the initial state. The issue is less urgent in 4.12 since network driver now uses NAPI and not the tasklet; and other VMBUS devices are rarely unloaded/reloaded. Fixes: dad72a1d2844 ("vmbus: remove hv_event_tasklet_disable/enable") Signed-off-by: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx> Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/hv/channel.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -606,6 +606,8 @@ static int vmbus_close_internal(struct v get_order(channel->ringbuffer_pagecount * PAGE_SIZE)); out: + /* re-enable tasklet for use on re-open */ + tasklet_enable(&channel->callback_event); return ret; } Patches currently in stable-queue which might be from stephen@xxxxxxxxxxxxxxxxxx are queue-4.12/vmbus-re-enable-channel-tasklet.patch