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authorDavid Vrabel <david.vrabel@citrix.com>2016-10-11 16:48:27 +0100
committerDavid S. Miller <davem@davemloft.net>2016-10-13 10:20:58 -0400
commitd1ef006dc116bf6487426b0b50c1bf2bf51e6423 (patch)
tree8192b6e1799044721cf99d86739b6353b90da178 /drivers/net
parent02a9079c66341836c4914c33c06a73245060df2e (diff)
downloadlinux-d1ef006dc116bf6487426b0b50c1bf2bf51e6423.tar.bz2
xen-netback: fix guest Rx stall detection (after guest Rx refactor)
If a VIF has been ready for rx_stall_timeout (60s by default) and an Rx ring is drained of all requests an Rx stall will be incorrectly detected. When this occurs and the guest Rx queue is empty, the Rx ring's event index will not be set and the frontend will not raise an event when new requests are placed on the ring, permanently stalling the VIF. This is a regression introduced by eb1723a29b9a7 (xen-netback: refactor guest rx). Fix this by reinstating the setting of queue->last_rx_time when placing a packet onto the guest Rx ring. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Paul Durrant <paul.durrant@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/xen-netback/rx.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/xen-netback/rx.c b/drivers/net/xen-netback/rx.c
index 8e9ade6ccf18..d69f2a92063c 100644
--- a/drivers/net/xen-netback/rx.c
+++ b/drivers/net/xen-netback/rx.c
@@ -425,6 +425,8 @@ void xenvif_rx_skb(struct xenvif_queue *queue)
xenvif_rx_next_skb(queue, &pkt);
+ queue->last_rx_time = jiffies;
+
do {
struct xen_netif_rx_request *req;
struct xen_netif_rx_response *rsp;