diff options
Diffstat (limited to 'drivers/hv/channel_mgmt.c')
| -rw-r--r-- | drivers/hv/channel_mgmt.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index 1e0b996ed643..3736f71bdec5 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -279,9 +279,6 @@ static void vmbus_process_offer(struct work_struct *work) int ret; unsigned long flags; - /* The next possible work is rescind handling */ - INIT_WORK(&newchannel->work, vmbus_process_rescind_offer); - /* Make sure this is a new offer */ spin_lock_irqsave(&vmbus_connection.channel_lock, flags); @@ -341,7 +338,7 @@ static void vmbus_process_offer(struct work_struct *work) if (channel->sc_creation_callback != NULL) channel->sc_creation_callback(newchannel); - goto out; + goto done_init_rescind; } goto err_free_chan; @@ -382,7 +379,14 @@ static void vmbus_process_offer(struct work_struct *work) kfree(newchannel->device_obj); goto err_free_chan; } -out: +done_init_rescind: + spin_lock_irqsave(&newchannel->lock, flags); + /* The next possible work is rescind handling */ + INIT_WORK(&newchannel->work, vmbus_process_rescind_offer); + /* Check if rescind offer was already received */ + if (newchannel->rescind) + queue_work(newchannel->controlwq, &newchannel->work); + spin_unlock_irqrestore(&newchannel->lock, flags); return; err_free_chan: free_channel(newchannel); @@ -520,6 +524,7 @@ static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) { struct vmbus_channel_rescind_offer *rescind; struct vmbus_channel *channel; + unsigned long flags; rescind = (struct vmbus_channel_rescind_offer *)hdr; channel = relid2channel(rescind->child_relid); @@ -528,11 +533,20 @@ static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) /* Just return here, no channel found */ return; + spin_lock_irqsave(&channel->lock, flags); channel->rescind = true; + /* + * channel->work.func != vmbus_process_rescind_offer means we are still + * processing offer request and the rescind offer processing should be + * postponed. It will be done at the very end of vmbus_process_offer() + * as rescind flag is being checked there. + */ + if (channel->work.func == vmbus_process_rescind_offer) + /* work is initialized for vmbus_process_rescind_offer() from + * vmbus_process_offer() where the channel got created */ + queue_work(channel->controlwq, &channel->work); - /* work is initialized for vmbus_process_rescind_offer() from - * vmbus_process_offer() where the channel got created */ - queue_work(channel->controlwq, &channel->work); + spin_unlock_irqrestore(&channel->lock, flags); } /* |