svn commit: r302608 - head/sys/dev/hyperv/vmbus

Sepherosa Ziehau sephe at FreeBSD.org
Tue Jul 12 03:14:37 UTC 2016


Author: sephe
Date: Tue Jul 12 03:14:35 2016
New Revision: 302608
URL: https://svnweb.freebsd.org/changeset/base/302608

Log:
  hyperv/vmbus: Remove unnecessary check and unapplied comment
  
  MFC after:	1 week
  Sponsored by:	Microsoft OSTC
  Differential Revision:	https://reviews.freebsd.org/D6877

Modified:
  head/sys/dev/hyperv/vmbus/hv_channel.c

Modified: head/sys/dev/hyperv/vmbus/hv_channel.c
==============================================================================
--- head/sys/dev/hyperv/vmbus/hv_channel.c	Tue Jul 12 03:09:10 2016	(r302607)
+++ head/sys/dev/hyperv/vmbus/hv_channel.c	Tue Jul 12 03:14:35 2016	(r302608)
@@ -975,23 +975,6 @@ VmbusProcessChannelEvent(void* context, 
 	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;


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