svn commit: r308120 - head/sys/dev/hyperv/netvsc

[Sepherosa Ziehau]

Author: sephe
Date: Mon Oct 31 05:22:00 2016
New Revision: 308120
URL: https://svnweb.freebsd.org/changeset/base/308120

Log:
  hyperv/hn: Don't start shared TX taskq, if the hypervisor is not Hyper-V.
  
  - Move the SYSINIT to DRIVER/SECOND, i.e. after the vm_guest becomes
    determistic.
  - Minor style changes.
  
  MFC after:	1 week
  Sponsored by:	Microsoft
  Differential Revision:	https://reviews.freebsd.org/D8370

Modified:
  head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c

Modified: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
==============================================================================
--- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c	Mon Oct 31 05:05:12 2016	(r308119)
+++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c	Mon Oct 31 05:22:00 2016	(r308120)
@@ -4627,6 +4627,10 @@ hn_chan_callback(struct vmbus_channel *c
 static void
 hn_tx_taskq_create(void *arg __unused)
 {
+
+	if (vm_guest != VM_GUEST_HV)
+		return;
+
 	if (!hn_share_tx_taskq)
 		return;
 
@@ -4645,16 +4649,17 @@ hn_tx_taskq_create(void *arg __unused)
 		taskqueue_start_threads(&hn_tx_taskq, 1, PI_NET, "hn tx");
 	}
 }
-SYSINIT(hn_txtq_create, SI_SUB_DRIVERS, SI_ORDER_FIRST,
+SYSINIT(hn_txtq_create, SI_SUB_DRIVERS, SI_ORDER_SECOND,
     hn_tx_taskq_create, NULL);
 
 static void
 hn_tx_taskq_destroy(void *arg __unused)
 {
+
 	if (hn_tx_taskq != NULL)
 		taskqueue_free(hn_tx_taskq);
 }
-SYSUNINIT(hn_txtq_destroy, SI_SUB_DRIVERS, SI_ORDER_FIRST,
+SYSUNINIT(hn_txtq_destroy, SI_SUB_DRIVERS, SI_ORDER_SECOND,
     hn_tx_taskq_destroy, NULL);
 
 static device_method_t netvsc_methods[] = {