From 3be77774017fc3c7dd0b434265dfa417aac23545 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Sat, 1 Dec 2012 06:46:46 -0800 Subject: [PATCH] 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 Reviewed-by: Haiyang Zhang Signed-off-by: Greg Kroah-Hartman --- drivers/hv/connection.c | 13 ++++++++----- 1 file 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); } -- GitLab