Author: sephe
Date: Mon Aug  8 06:18:54 2016
New Revision: 303824
URL: https://svnweb.freebsd.org/changeset/base/303824

Log:
  hyperv/ic: Pass the channel callback to hv_util_attach()
  
  The saved channel callback in util softc is actually never used.
  
  MFC after:    1 week
  Sponsored by: Microsoft
  Differential Revision:        https://reviews.freebsd.org/D7424

Modified:
  head/sys/dev/hyperv/utilities/hv_heartbeat.c
  head/sys/dev/hyperv/utilities/hv_kvp.c
  head/sys/dev/hyperv/utilities/hv_shutdown.c
  head/sys/dev/hyperv/utilities/hv_timesync.c
  head/sys/dev/hyperv/utilities/hv_util.c
  head/sys/dev/hyperv/utilities/hv_util.h

Modified: head/sys/dev/hyperv/utilities/hv_heartbeat.c
==============================================================================
--- head/sys/dev/hyperv/utilities/hv_heartbeat.c        Mon Aug  8 06:11:28 
2016        (r303823)
+++ head/sys/dev/hyperv/utilities/hv_heartbeat.c        Mon Aug  8 06:18:54 
2016        (r303824)
@@ -109,11 +109,7 @@ hv_heartbeat_probe(device_t dev)
 static int
 hv_heartbeat_attach(device_t dev)
 {
-       hv_util_sc *softc = (hv_util_sc*)device_get_softc(dev);
-
-       softc->callback = hv_heartbeat_cb;
-
-       return hv_util_attach(dev);
+       return hv_util_attach(dev, hv_heartbeat_cb);
 }
 
 static device_method_t heartbeat_methods[] = {

Modified: head/sys/dev/hyperv/utilities/hv_kvp.c
==============================================================================
--- head/sys/dev/hyperv/utilities/hv_kvp.c      Mon Aug  8 06:11:28 2016        
(r303823)
+++ head/sys/dev/hyperv/utilities/hv_kvp.c      Mon Aug  8 06:18:54 2016        
(r303824)
@@ -892,7 +892,6 @@ hv_kvp_attach(device_t dev)
 
        hv_kvp_sc *sc = (hv_kvp_sc*)device_get_softc(dev);
 
-       sc->util_sc.callback = hv_kvp_callback;
        sc->dev = dev;
        sema_init(&sc->dev_sema, 0, "hv_kvp device semaphore");
        mtx_init(&sc->pending_mutex, "hv-kvp pending mutex",
@@ -920,7 +919,7 @@ hv_kvp_attach(device_t dev)
                return (error);
        sc->hv_kvp_dev->si_drv1 = sc;
 
-       return hv_util_attach(dev);
+       return hv_util_attach(dev, hv_kvp_callback);
 }
 
 static int

Modified: head/sys/dev/hyperv/utilities/hv_shutdown.c
==============================================================================
--- head/sys/dev/hyperv/utilities/hv_shutdown.c Mon Aug  8 06:11:28 2016        
(r303823)
+++ head/sys/dev/hyperv/utilities/hv_shutdown.c Mon Aug  8 06:18:54 2016        
(r303824)
@@ -131,11 +131,7 @@ hv_shutdown_probe(device_t dev)
 static int
 hv_shutdown_attach(device_t dev)
 {
-       hv_util_sc *softc = (hv_util_sc*)device_get_softc(dev);
-
-       softc->callback = hv_shutdown_cb;
-
-       return hv_util_attach(dev);
+       return hv_util_attach(dev, hv_shutdown_cb);
 }
 
 static device_method_t shutdown_methods[] = {

Modified: head/sys/dev/hyperv/utilities/hv_timesync.c
==============================================================================
--- head/sys/dev/hyperv/utilities/hv_timesync.c Mon Aug  8 06:11:28 2016        
(r303823)
+++ head/sys/dev/hyperv/utilities/hv_timesync.c Mon Aug  8 06:18:54 2016        
(r303824)
@@ -189,18 +189,16 @@ hv_timesync_attach(device_t dev)
 {
        hv_timesync_sc *softc = device_get_softc(dev);
 
-       softc->util_sc.callback = hv_timesync_cb;
        TASK_INIT(&softc->task, 1, hv_set_host_time, softc);
-
-       return hv_util_attach(dev);
+       return hv_util_attach(dev, hv_timesync_cb);
 }
 
 static int
 hv_timesync_detach(device_t dev)
 {
        hv_timesync_sc *softc = device_get_softc(dev);
-       taskqueue_drain(taskqueue_thread, &softc->task);
 
+       taskqueue_drain(taskqueue_thread, &softc->task);
        return hv_util_detach(dev);
 }
 

Modified: head/sys/dev/hyperv/utilities/hv_util.c
==============================================================================
--- head/sys/dev/hyperv/utilities/hv_util.c     Mon Aug  8 06:11:28 2016        
(r303823)
+++ head/sys/dev/hyperv/utilities/hv_util.c     Mon Aug  8 06:18:54 2016        
(r303824)
@@ -75,7 +75,7 @@ hv_negotiate_version(struct hv_vmbus_icm
 }
 
 int
-hv_util_attach(device_t dev)
+hv_util_attach(device_t dev, vmbus_chan_callback_t cb)
 {
        struct hv_util_sc *sc = device_get_softc(dev);
        struct vmbus_channel *chan = vmbus_get_channel(dev);
@@ -95,7 +95,7 @@ hv_util_attach(device_t dev)
        vmbus_chan_set_readbatch(chan, false);
 
        error = vmbus_chan_open(chan, VMBUS_IC_BRSIZE, VMBUS_IC_BRSIZE, NULL, 0,
-           sc->callback, sc);
+           cb, sc);
        if (error) {
                free(sc->receive_buffer, M_DEVBUF);
                return (error);

Modified: head/sys/dev/hyperv/utilities/hv_util.h
==============================================================================
--- head/sys/dev/hyperv/utilities/hv_util.h     Mon Aug  8 06:11:28 2016        
(r303823)
+++ head/sys/dev/hyperv/utilities/hv_util.h     Mon Aug  8 06:18:54 2016        
(r303824)
@@ -31,22 +31,20 @@
 #ifndef _HVUTIL_H_
 #define _HVUTIL_H_
 
+#include <dev/hyperv/include/vmbus.h>
+
 /**
  * hv_util related structures
  *
  */
 typedef struct hv_util_sc {
-       /*
-        * function to process Hyper-V messages
-        */
-       void (*callback)(struct vmbus_channel *, void *);
        uint8_t                 *receive_buffer;
        int                     ic_buflen;
 } hv_util_sc;
 
 void hv_negotiate_version(struct hv_vmbus_icmsg_hdr *icmsghdrp, uint8_t *buf);
 
-int hv_util_attach(device_t dev);
+int hv_util_attach(device_t dev, vmbus_chan_callback_t cb);
 int hv_util_detach(device_t dev);
 
 #endif
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