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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-02-14 09:04:36 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-02-14 09:04:36 +0100
commitfbd533e90d239e17d9427a6481ae60be25680cb7 (patch)
tree72f5b36af33981605eecf92da1516b9b4c37d5a6 /drivers/net/veth.c
parentc18553956f34819e224a79c9890eba2ba0604e15 (diff)
parent754e0b0e35608ed5206d6a67a791563c631cec07 (diff)
Merge 5.17-rc4 into usb-next
We need the USB fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/veth.c')
-rw-r--r--drivers/net/veth.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index 354a963075c5..d29fb9759cc9 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -265,9 +265,10 @@ static void __veth_xdp_flush(struct veth_rq *rq)
{
/* Write ptr_ring before reading rx_notify_masked */
smp_mb();
- if (!rq->rx_notify_masked) {
- rq->rx_notify_masked = true;
- napi_schedule(&rq->xdp_napi);
+ if (!READ_ONCE(rq->rx_notify_masked) &&
+ napi_schedule_prep(&rq->xdp_napi)) {
+ WRITE_ONCE(rq->rx_notify_masked, true);
+ __napi_schedule(&rq->xdp_napi);
}
}
@@ -912,8 +913,10 @@ static int veth_poll(struct napi_struct *napi, int budget)
/* Write rx_notify_masked before reading ptr_ring */
smp_store_mb(rq->rx_notify_masked, false);
if (unlikely(!__ptr_ring_empty(&rq->xdp_ring))) {
- rq->rx_notify_masked = true;
- napi_schedule(&rq->xdp_napi);
+ if (napi_schedule_prep(&rq->xdp_napi)) {
+ WRITE_ONCE(rq->rx_notify_masked, true);
+ __napi_schedule(&rq->xdp_napi);
+ }
}
}