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Diffstat (limited to 'drivers/hv/channel.c')
-rw-r--r--drivers/hv/channel.c50
1 files changed, 46 insertions, 4 deletions
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 0b122f8c7005..6de6c98ce6eb 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -116,6 +116,15 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
unsigned long flags;
int ret, t, err = 0;
+ spin_lock_irqsave(&newchannel->sc_lock, flags);
+ if (newchannel->state == CHANNEL_OPEN_STATE) {
+ newchannel->state = CHANNEL_OPENING_STATE;
+ } else {
+ spin_unlock_irqrestore(&newchannel->sc_lock, flags);
+ return -EINVAL;
+ }
+ spin_unlock_irqrestore(&newchannel->sc_lock, flags);
+
newchannel->onchannel_callback = onchannelcallback;
newchannel->channel_callback_context = context;
@@ -216,6 +225,9 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
list_del(&open_info->msglistentry);
spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
+ if (err == 0)
+ newchannel->state = CHANNEL_OPENED_STATE;
+
kfree(open_info);
return err;
@@ -500,15 +512,14 @@ int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle)
}
EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl);
-/*
- * vmbus_close - Close the specified channel
- */
-void vmbus_close(struct vmbus_channel *channel)
+static void vmbus_close_internal(struct vmbus_channel *channel)
{
struct vmbus_channel_close_channel *msg;
int ret;
unsigned long flags;
+ channel->state = CHANNEL_OPEN_STATE;
+ channel->sc_creation_callback = NULL;
/* Stop callback and cancel the timer asap */
spin_lock_irqsave(&channel->inbound_lock, flags);
channel->onchannel_callback = NULL;
@@ -538,6 +549,37 @@ void vmbus_close(struct vmbus_channel *channel)
}
+
+/*
+ * vmbus_close - Close the specified channel
+ */
+void vmbus_close(struct vmbus_channel *channel)
+{
+ struct list_head *cur, *tmp;
+ struct vmbus_channel *cur_channel;
+
+ if (channel->primary_channel != NULL) {
+ /*
+ * We will only close sub-channels when
+ * the primary is closed.
+ */
+ return;
+ }
+ /*
+ * Close all the sub-channels first and then close the
+ * primary channel.
+ */
+ list_for_each_safe(cur, tmp, &channel->sc_list) {
+ cur_channel = list_entry(cur, struct vmbus_channel, sc_list);
+ if (cur_channel->state != CHANNEL_OPENED_STATE)
+ continue;
+ vmbus_close_internal(cur_channel);
+ }
+ /*
+ * Now close the primary.
+ */
+ vmbus_close_internal(channel);
+}
EXPORT_SYMBOL_GPL(vmbus_close);
/**

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