From 66be653083057358724d56d817e870e53fb81ca7 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Wed, 27 Aug 2014 16:25:32 -0700 Subject: Drivers: hv: vmbus: Cleanup vmbus_teardown_gpadl() Eliminate calls to BUG_ON() by properly handling errors. In cases where rollback is possible, we will return the appropriate error to have the calling code decide how to rollback state. In the case where we are transferring ownership of the guest physical pages to the host, we will wait for the host to respond. Signed-off-by: K. Y. Srinivasan Cc: Tested-by: Sitsofe Wheeler Signed-off-by: Greg Kroah-Hartman --- drivers/hv/channel.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'drivers/hv') diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index 531a593912ec..020631453394 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -435,7 +435,7 @@ int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) struct vmbus_channel_gpadl_teardown *msg; struct vmbus_channel_msginfo *info; unsigned long flags; - int ret, t; + int ret; info = kmalloc(sizeof(*info) + sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); @@ -457,11 +457,12 @@ int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) ret = vmbus_post_msg(msg, sizeof(struct vmbus_channel_gpadl_teardown)); - BUG_ON(ret != 0); - t = wait_for_completion_timeout(&info->waitevent, 5*HZ); - BUG_ON(t == 0); + if (ret) + goto post_msg_err; + + wait_for_completion(&info->waitevent); - /* Received a torndown response */ +post_msg_err: spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); list_del(&info->msglistentry); spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); -- cgit v1.2.3