diff mbox series

[3/7] net/vmbus: add missing barrier

Message ID 20200430190853.498-4-stephen@networkplumber.org (mailing list archive)
State Accepted, archived
Delegated to: Ferruh Yigit
Headers
Series net/netvsc: more minor fixes |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation fail Compilation issues

Commit Message

Stephen Hemminger April 30, 2020, 7:08 p.m. UTC 
  The check for event ring being empty needs a barrier
to avoid any over agressive optimization.
This is same barrier as Linux kernel.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/bus/vmbus/vmbus_channel.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/bus/vmbus/vmbus_channel.c b/drivers/bus/vmbus/vmbus_channel.c
index 46b3ba3f9f9e..ff2985c25758 100644
--- a/drivers/bus/vmbus/vmbus_channel.c
+++ b/drivers/bus/vmbus/vmbus_channel.c
@@ -199,6 +199,7 @@  bool rte_vmbus_chan_rx_empty(const struct vmbus_channel *channel)
 {
 	const struct vmbus_br *br = &channel->rxbr;
 
+	rte_smp_rmb();
 	return br->vbr->rindex == br->vbr->windex;
 }