From: Tiwei Bie <tiwei.bie@intel.com>
To: yskoh@mellanox.com, stable@dpdk.org
Cc: maxime.coquelin@redhat.com, zhihong.wang@intel.com
Subject: [dpdk-stable] [PATCH 17.11] net/virtio: add barrier in interrupt enable
Date: Fri, 9 Aug 2019 19:09:04 +0800 [thread overview]
Message-ID: <20190809110904.31669-1-tiwei.bie@intel.com> (raw)
[ backported from upstream commit 8f66bc4ac3c0d4a11252d860f495abd806aa871f ]
Typically, after enabling Rx interrupt, a check should be done
to make sure that there is no new incoming packets before going
to sleep. So a barrier is needed to make sure that any following
check won't happen before the interrupt is actually enabled.
Fixes: c056be239db5 ("net/virtio: add Rx interrupt enable/disable functions")
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
drivers/net/virtio/virtio_ethdev.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index b3e55ff3b..1bdf37e4b 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -739,6 +739,7 @@ virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
struct virtqueue *vq = rxvq->vq;
virtqueue_enable_intr(vq);
+ virtio_mb();
return 0;
}
--
2.17.1
next reply other threads:[~2019-08-09 11:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-09 11:09 Tiwei Bie [this message]
2019-08-12 18:49 ` Yongseok Koh
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