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Date: Fri, 14 Jan 2022 12:43:53 +0100 From: Corinna Vinschen <vinschen@...hat.com> To: intel-wired-lan@...osl.org, netdev@...r.kernel.org, Vinicius Costa Gomes <vinicius.gomes@...el.com> Cc: Lennert Buytenhek <buytenh@...tstofly.org>, Alexander Lobakin <alexandr.lobakin@...el.com> Subject: [PATCH 1/2 net-next v2] igc: avoid kernel warning when changing RX ring parameters Calling ethtool changing the RX ring parameters like this: $ ethtool -G eth0 rx 1024 on igc triggers the "Missing unregister, handled but fix driver" warning in xdp_rxq_info_reg(). igc_ethtool_set_ringparam() copies the igc_ring structure but neglects to reset the xdp_rxq_info member before calling igc_setup_rx_resources(). This in turn calls xdp_rxq_info_reg() with an already registered xdp_rxq_info. Make sure to unregister the xdp_rxq_info structure first in igc_setup_rx_resources. Move xdp_rxq_info handling down to bethe last action, thus allowing to remove the xdp_rxq_info_unreg call in the error path. Fixes: 73f1071c1d29 ("igc: Add support for XDP_TX action") Signed-off-by: Corinna Vinschen <vinschen@...hat.com> --- drivers/net/ethernet/intel/igc/igc_main.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 2f17f36e94fd..97144f6db36e 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -505,14 +505,6 @@ int igc_setup_rx_resources(struct igc_ring *rx_ring) u8 index = rx_ring->queue_index; int size, desc_len, res; - res = xdp_rxq_info_reg(&rx_ring->xdp_rxq, ndev, index, - rx_ring->q_vector->napi.napi_id); - if (res < 0) { - netdev_err(ndev, "Failed to register xdp_rxq index %u\n", - index); - return res; - } - size = sizeof(struct igc_rx_buffer) * rx_ring->count; rx_ring->rx_buffer_info = vzalloc(size); if (!rx_ring->rx_buffer_info) @@ -534,10 +526,20 @@ int igc_setup_rx_resources(struct igc_ring *rx_ring) rx_ring->next_to_clean = 0; rx_ring->next_to_use = 0; + /* XDP RX-queue info */ + if (xdp_rxq_info_is_reg(&rx_ring->xdp_rxq)) + xdp_rxq_info_unreg(&rx_ring->xdp_rxq); + res = xdp_rxq_info_reg(&rx_ring->xdp_rxq, ndev, index, + rx_ring->q_vector->napi.napi_id); + if (res < 0) { + netdev_err(ndev, "Failed to register xdp_rxq index %u\n", + index); + return res; + } + return 0; err: - xdp_rxq_info_unreg(&rx_ring->xdp_rxq); vfree(rx_ring->rx_buffer_info); rx_ring->rx_buffer_info = NULL; netdev_err(ndev, "Unable to allocate memory for Rx descriptor ring\n"); -- 2.27.0
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