Staging: hv: vmbus_drv: Introduce state in struct vmbus_channel to track util services

In preparation for getting rid of util channel synchronization based on
counting util channels, introduce state in  struct vmbus_channel  to
track util services.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/hv/channel_mgmt.c b/drivers/staging/hv/channel_mgmt.c
index e8c706c..1021713 100644 (file)
--- a/drivers/staging/hv/channel_mgmt.c
+++ b/drivers/staging/hv/channel_mgmt.c
@@ -419,6 +419,7 @@ static void vmbus_process_offer(struct work_struct *work)
                 * can cleanup properly
                 */
                newchannel->state = CHANNEL_OPEN_STATE;
+               newchannel->util_index = -1; /* Invalid index */
 
                /* Open IC channels */
                for (cnt = 0; cnt < MAX_MSG_TYPES; cnt++) {
@@ -430,6 +431,7 @@ static void vmbus_process_offer(struct work_struct *work)
                                                 hv_cb_utils[cnt].callback,
                                                 newchannel) == 0) {
                                hv_cb_utils[cnt].channel = newchannel;
+                               newchannel->util_index = cnt;
 
                                pr_info("%s\n", hv_cb_utils[cnt].log_msg);
 

diff --git a/drivers/staging/hv/hyperv.h b/drivers/staging/hv/hyperv.h
index 56af1ec..8b826a1 100644 (file)
--- a/drivers/staging/hv/hyperv.h
+++ b/drivers/staging/hv/hyperv.h
@@ -532,6 +532,11 @@ struct vmbus_channel {
        struct work_struct work;
 
        enum vmbus_channel_state state;
+       /*
+        * For util channels, stash the
+        * the service index for easy access.
+        */
+       s8 util_index;
 
        struct vmbus_channel_offer_channel offermsg;
        /*