[PATCH 3/8] Staging: hv: vmbus: Check for events before messages

K. Y. Srinivasan
2011-08-15T21:52:18Z

Hyper-V requires that events be processed before processing messages. Make the
necessary code adjustments.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
---
drivers/staging/hv/vmbus_drv.c | 18 +++++++++---------
1 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c
index 1d4e878..536466b 100644
--- a/drivers/staging/hv/vmbus_drv.c
+++ b/drivers/staging/hv/vmbus_drv.c
@@ -418,15 +418,6 @@ static irqreturn_t vmbus_isr(int irq, void *dev_id)
union hv_synic_event_flags *event;
bool handled = false;

- page_addr = hv_context.synic_message_page[cpu];
- msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT;
-
- /* Check if there are actual msgs to be process */
- if (msg->header.message_type != HVMSG_NONE) {
- handled = true;
- vmbus_on_msg_dpc(0);
- }
-
page_addr = hv_context.synic_event_page[cpu];
event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT;

@@ -436,6 +427,15 @@ static irqreturn_t vmbus_isr(int irq, void *dev_id)
tasklet_schedule(&event_dpc);
}

+ page_addr = hv_context.synic_message_page[cpu];
+ msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT;
+
+ /* Check if there are actual msgs to be process */
+ if (msg->header.message_type != HVMSG_NONE) {
+ handled = true;
+ vmbus_on_msg_dpc(0);
+ }
+
if (handled)
return IRQ_HANDLED;
else
--
1.7.4.1