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authorK. Y. Srinivasan <kys@microsoft.com>2012-12-01 06:46:46 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-01-17 11:34:37 -0800
commit3be77774017fc3c7dd0b434265dfa417aac23545 (patch)
treed50aa05aa9ef8bb01499153e48fd08a9458546f7 /drivers/hv
parentb3bf60c7b4665d40b8eae2217b54c4745f49f470 (diff)
Drivers: hv: Cleanup vmbus_set_event() to support win7 and beyond
On win7 (ws2008 R2) and beyond, we have the notion of having dedicated interrupts on a per-channel basis. When a channel has a dedicated interrupt assigned, there is no need to set the interrupt bit in the shared page. Implement this optimization. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/connection.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index 56b14e57bdd8..114050dc8e28 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -383,10 +383,13 @@ int vmbus_post_msg(void *buffer, size_t buflen)
int vmbus_set_event(struct vmbus_channel *channel)
{
u32 child_relid = channel->offermsg.child_relid;
- /* Each u32 represents 32 channels */
- sync_set_bit(child_relid & 31,
- (unsigned long *)vmbus_connection.send_int_page +
- (child_relid >> 5));
- return hv_signal_event(hv_context.signal_event_param);
+ if (!channel->is_dedicated_interrupt) {
+ /* Each u32 represents 32 channels */
+ sync_set_bit(child_relid & 31,
+ (unsigned long *)vmbus_connection.send_int_page +
+ (child_relid >> 5));
+ }
+
+ return hv_signal_event(channel->sig_event);
}

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