From ee200a7377fb6ce5ea6d631af0905883f0dca6d2 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Sat, 22 Apr 2017 20:17:55 -0700 Subject: [PATCH] nfp: fix free list buffer size reporting XDP headroom should not be included in free list buffer size. Fixes: 6fe0c3b43804 ("nfp: add support for xdp_adjust_head()") Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller --- drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 3285053bece0..8a9b74305493 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -2165,7 +2165,7 @@ nfp_net_tx_ring_hw_cfg_write(struct nfp_net *nn, */ static int nfp_net_set_config_and_enable(struct nfp_net *nn) { - u32 new_ctrl, update = 0; + u32 bufsz, new_ctrl, update = 0; unsigned int r; int err; @@ -2199,8 +2199,9 @@ static int nfp_net_set_config_and_enable(struct nfp_net *nn) nfp_net_write_mac_addr(nn); nn_writel(nn, NFP_NET_CFG_MTU, nn->dp.netdev->mtu); - nn_writel(nn, NFP_NET_CFG_FLBUFSZ, - nn->dp.fl_bufsz - NFP_NET_RX_BUF_NON_DATA); + + bufsz = nn->dp.fl_bufsz - nn->dp.rx_dma_off - NFP_NET_RX_BUF_NON_DATA; + nn_writel(nn, NFP_NET_CFG_FLBUFSZ, bufsz); /* Enable device */ new_ctrl |= NFP_NET_CFG_CTRL_ENABLE;