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path: root/drivers/hv/vmbus_drv.c
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Diffstat (limited to 'drivers/hv/vmbus_drv.c')
-rw-r--r--drivers/hv/vmbus_drv.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index eaf1a10b0245..f7f6b9144b07 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -887,6 +887,18 @@ msg_handled:
/*
+ * Direct callback for channels using other deferred processing
+ */
+static void vmbus_channel_isr(struct vmbus_channel *channel)
+{
+ void (*callback_fn)(void *);
+
+ callback_fn = READ_ONCE(channel->onchannel_callback);
+ if (likely(callback_fn != NULL))
+ (*callback_fn)(channel->channel_callback_context);
+}
+
+/*
* Schedule all channels with events pending
*/
static void vmbus_chan_sched(struct hv_per_cpu_context *hv_cpu)
@@ -927,9 +939,19 @@ static void vmbus_chan_sched(struct hv_per_cpu_context *hv_cpu)
/* Find channel based on relid */
list_for_each_entry(channel, &hv_cpu->chan_list, percpu_list) {
- if (channel->offermsg.child_relid == relid) {
- tasklet_schedule(&channel->callback_event);
+ if (channel->offermsg.child_relid != relid)
+ continue;
+
+ switch (channel->callback_mode) {
+ case HV_CALL_ISR:
+ vmbus_channel_isr(channel);
break;
+
+ case HV_CALL_BATCHED:
+ hv_begin_read(&channel->inbound);
+ /* fallthrough */
+ case HV_CALL_DIRECT:
+ tasklet_schedule(&channel->callback_event);
}
}
}