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OpenCloudOS-Kernel
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Staging: hv: Fix vmbus event handler bug 

The flag ENABLE_POLLING is always enabled in original Makefile, but
accidently removed during porting to mainline kernel. The patch fixes
this bug which can cause stalled network communication.  Credit needs to
go to Eric Sesterhenn <eric.sesterhenn@lsexperts.de> For pointing out a
typo in the original code as well.

Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Haiyang Zhang 2009-11-20 16:29:17 +00:00 committed by Greg Kroah-Hartman
parent 8c960e49d8
commit 5996b3ddc4
2 changed files with 5 additions and 13 deletions
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16
drivers/staging/hv/Channel.c
View File

@ -611,7 +611,7 @@ void VmbusChannelClose(struct vmbus_channel *Channel)
/* Stop callback and cancel the timer asap */
Channel->OnChannelCallback = NULL;
del_timer(&Channel->poll_timer);
del_timer_sync(&Channel->poll_timer);
/* Send a closing message */
info = kmalloc(sizeof(*info) +
@ -978,14 +978,10 @@ void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel)
{
DumpVmbusChannel(Channel);
ASSERT(Channel->OnChannelCallback);
#ifdef ENABLE_POLLING
del_timer(&Channel->poll_timer);
Channel->OnChannelCallback(Channel->ChannelCallbackContext);
channel->poll_timer.expires(jiffies + usecs_to_jiffies(100);
add_timer(&channel->poll_timer);
#else
Channel->OnChannelCallback(Channel->ChannelCallbackContext);
#endif
mod_timer(&Channel->poll_timer, jiffies + usecs_to_jiffies(100));
}
/**
@ -997,10 +993,6 @@ void VmbusChannelOnTimer(unsigned long data)
if (channel->OnChannelCallback) {
channel->OnChannelCallback(channel->ChannelCallbackContext);
#ifdef ENABLE_POLLING
channel->poll_timer.expires(jiffies + usecs_to_jiffies(100);
add_timer(&channel->poll_timer);
#endif
}
}

2
drivers/staging/hv/ChannelMgmt.c
View File

@ -119,7 +119,7 @@ static inline void ReleaseVmbusChannel(void *context)
*/
void FreeVmbusChannel(struct vmbus_channel *Channel)
{
del_timer(&Channel->poll_timer);
del_timer_sync(&Channel->poll_timer);
/*
* We have to release the channel's workqueue/thread in the vmbus's