Properly rollback state in vmbus_pocess_offer() in the failure paths.
Signed-off-by: K. Y. Srinivasan <k...@microsoft.com>
---
drivers/hv/channel_mgmt.c | 21 ++++++++++++++++-----
1 files changed, 16 insertions(+), 5 deletions(-)
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 6c1f792..cc6996a 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -384,7 +384,7 @@ static void vmbus_process_offer(struct vmbus_channel
*newchannel)
&newchannel->offermsg.offer.if_instance,
newchannel);
if (!newchannel->device_obj)
- goto err_free_chan;
+ goto err_deq_chan;
/*
* Add the new device to the bus. This will kick off device-driver
@@ -396,15 +396,26 @@ static void vmbus_process_offer(struct vmbus_channel
*newchannel)
pr_err("unable to add child device object (relid %d)\n",
newchannel->offermsg.child_relid);
- spin_lock_irqsave(&vmbus_connection.channel_lock, flags);
- list_del(&newchannel->listentry);
- spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags);
kfree(newchannel->device_obj);
- goto err_free_chan;
+ goto err_deq_chan;
}
return;
+err_deq_chan:
+ spin_lock_irqsave(&vmbus_connection.channel_lock, flags);
+ list_del(&newchannel->listentry);
+ spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags);
+
+ if (newchannel->target_cpu != get_cpu()) {
+ put_cpu();
+ smp_call_function_single(newchannel->target_cpu,
+ percpu_channel_deq, newchannel, true);
+ } else {
+ percpu_channel_deq(newchannel);
+ put_cpu();
+ }
+
err_free_chan:
free_channel(newchannel);
}
--
1.7.4.1
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