diff options
Diffstat (limited to 'drivers/hv/channel.c')
| -rw-r--r-- | drivers/hv/channel.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index 23f358cb7f49..256ee90c7446 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -609,6 +609,12 @@ void vmbus_reset_channel_cb(struct vmbus_channel *channel) * the former is accessing channel->inbound.ring_buffer, the latter * could be freeing the ring_buffer pages, so here we must stop it * first. + * + * vmbus_chan_sched() might call the netvsc driver callback function + * that ends up scheduling NAPI work that accesses the ring buffer. + * At this point, we have to ensure that any such work is completed + * and that the channel ring buffer is no longer being accessed, cf. + * the calls to napi_disable() in netvsc_device_remove(). */ tasklet_disable(&channel->callback_event); |