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>
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@ -611,7 +611,7 @@ void VmbusChannelClose(struct vmbus_channel *Channel)
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/* Stop callback and cancel the timer asap */
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Channel->OnChannelCallback = NULL;
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del_timer(&Channel->poll_timer);
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del_timer_sync(&Channel->poll_timer);
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/* Send a closing message */
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info = kmalloc(sizeof(*info) +
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@ -978,14 +978,10 @@ void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel)
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{
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DumpVmbusChannel(Channel);
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ASSERT(Channel->OnChannelCallback);
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#ifdef ENABLE_POLLING
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del_timer(&Channel->poll_timer);
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Channel->OnChannelCallback(Channel->ChannelCallbackContext);
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channel->poll_timer.expires(jiffies + usecs_to_jiffies(100);
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add_timer(&channel->poll_timer);
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#else
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Channel->OnChannelCallback(Channel->ChannelCallbackContext);
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#endif
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mod_timer(&Channel->poll_timer, jiffies + usecs_to_jiffies(100));
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}
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/**
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@ -997,10 +993,6 @@ void VmbusChannelOnTimer(unsigned long data)
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if (channel->OnChannelCallback) {
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channel->OnChannelCallback(channel->ChannelCallbackContext);
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#ifdef ENABLE_POLLING
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channel->poll_timer.expires(jiffies + usecs_to_jiffies(100);
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add_timer(&channel->poll_timer);
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#endif
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}
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}
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@ -119,7 +119,7 @@ static inline void ReleaseVmbusChannel(void *context)
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*/
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void FreeVmbusChannel(struct vmbus_channel *Channel)
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{
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del_timer(&Channel->poll_timer);
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del_timer_sync(&Channel->poll_timer);
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/*
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* We have to release the channel's workqueue/thread in the vmbus's
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