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hyperv/vmbus: Remove unnecessary check and unapplied comment

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MFC after:	1 week
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D6877
This commit is contained in:
Sepherosa Ziehau 2016-07-12 03:14:35 +00:00
parent fc1208d658
commit df9f40d810
1 changed files with 0 additions and 17 deletions
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17
sys/dev/hyperv/vmbus/hv_channel.c
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@ -975,23 +975,6 @@ VmbusProcessChannelEvent(void* context, int pending)
hv_vmbus_channel* channel = (hv_vmbus_channel*)context;
boolean_t is_batched_reading;
/**
* Find the channel based on this relid and invokes
* the channel callback to process the event
*/
if (channel == NULL) {
return;
}
/**
* To deal with the race condition where we might
* receive a packet while the relevant driver is
* being unloaded, dispatch the callback while
* holding the channel lock. The unloading driver
* will acquire the same channel lock to set the
* callback to NULL. This closes the window.
*/
if (channel->on_channel_callback != NULL) {
arg = channel->channel_callback_context;
is_batched_reading = channel->batched_reading;