netdev - [PATCH bpf-next v2 01/14] nfp: don't try to register XDP rxq structures on control queues

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Message-Id: <1515587167-1959-2-git-send-email-quentin.monnet@netronome.com>
Date:   Wed, 10 Jan 2018 12:25:54 +0000
From:   Quentin Monnet <quentin.monnet@...ronome.com>
To:     daniel@...earbox.net, alexei.starovoitov@...il.com,
        netdev@...r.kernel.org
Cc:     oss-drivers@...ronome.com, jakub.kicinski@...ronome.com
Subject: [PATCH bpf-next v2 01/14] nfp: don't try to register XDP rxq structures on control queues

From: Jakub Kicinski <jakub.kicinski@...ronome.com>

Some RX rings are used for control messages, those will not have
a netdev pointer in dp.  Skip XDP rxq handling on those rings.

Fixes: 7f1c684a8966 ("nfp: setup xdp_rxq_info")
Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@...ronome.com>
---
 drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 05e071b3dc5b..104d6c520a52 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -2253,7 +2253,8 @@ static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring)
 	struct nfp_net_r_vector *r_vec = rx_ring->r_vec;
 	struct nfp_net_dp *dp = &r_vec->nfp_net->dp;
 
-	xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
+	if (dp->netdev)
+		xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
 	kfree(rx_ring->rxbufs);
 
 	if (rx_ring->rxds)
@@ -2279,9 +2280,12 @@ nfp_net_rx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring)
 {
 	int sz, err;
 
-	err = xdp_rxq_info_reg(&rx_ring->xdp_rxq, dp->netdev, rx_ring->idx);
-	if (err < 0)
-		return err;
+	if (dp->netdev) {
+		err = xdp_rxq_info_reg(&rx_ring->xdp_rxq, dp->netdev,
+				       rx_ring->idx);
+		if (err < 0)
+			return err;
+	}
 
 	rx_ring->cnt = dp->rxd_cnt;
 	rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt;
-- 
2.7.4