From: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
The current code unconditionally sends an IPI. If we are running on the
correct CPU and are in interrupt level, we don't need an IPI.
Make this adjustment.
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
---
drivers/hv/hyperv_vmbus.h | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index 6113e91..fa514be 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -411,6 +411,10 @@ static inline void hv_poll_channel(struct vmbus_channel *channel,
if (!channel)
return;
+ if (in_interrupt() && (channel->target_cpu == smp_processor_id())) {
+ cb(channel);
+ return;
+ }
smp_call_function_single(channel->target_cpu, cb, channel, true);
}
--
1.7.1
_______________________________________________
devel mailing list
devel@xxxxxxxxxxxxxxxxxxxxxx
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
