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. Patch for upstream is pending, but less urgent since problem doesn't happen with network driver in 4.12. Signed-off-by: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx> --- drivers/hv/channel.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index 321b8833fa6f..36c9ce191b74 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -606,6 +606,8 @@ static int vmbus_close_internal(struct vmbus_channel *channel) get_order(channel->ringbuffer_pagecount * PAGE_SIZE)); out: + /* re-enable tasklet for use on re-open */ + tasklet_enable(&channel->callback_event); return ret; } -- 2.11.0 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
