4.16-stable review patch. If anyone has any objections, please let me know.
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From: Jakub Kicinski jakub.kicinski@netronome.com
[ Upstream commit c55ca688ed99a9cb79367aee2ed2ff6cb80fc039 ]
For very very old generation of the management FW Ethernet port information table may theoretically not be available. This in turn will cause the nfp_port structures to not be allocated.
Make sure we don't crash the kernel when there is no eth_tbl:
RIP: 0010:nfp_net_pci_probe+0xf2/0xb40 [nfp] ... Call Trace: nfp_pci_probe+0x6de/0xab0 [nfp] local_pci_probe+0x47/0xa0 work_for_cpu_fn+0x1a/0x30 process_one_work+0x1de/0x3e0
Found while working with broken/development version of management FW.
Fixes: a5950182c00e ("nfp: map mac_stats and vf_cfg BARs") Fixes: 93da7d9660ee ("nfp: provide nfp_port to of nfp_net_get_mac_addr()") Signed-off-by: Jakub Kicinski jakub.kicinski@netronome.com Reviewed-by: Dirk van der Merwe dirk.vandermerwe@netronome.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/netronome/nfp/flower/main.c | 2 - drivers/net/ethernet/netronome/nfp/nfp_app_nic.c | 2 - drivers/net/ethernet/netronome/nfp/nfp_main.h | 4 ++ drivers/net/ethernet/netronome/nfp/nfp_net_main.c | 31 ++++++++++++---------- 4 files changed, 23 insertions(+), 16 deletions(-)
--- a/drivers/net/ethernet/netronome/nfp/flower/main.c +++ b/drivers/net/ethernet/netronome/nfp/flower/main.c @@ -358,7 +358,7 @@ nfp_flower_spawn_phy_reprs(struct nfp_ap }
SET_NETDEV_DEV(repr, &priv->nn->pdev->dev); - nfp_net_get_mac_addr(app->pf, port); + nfp_net_get_mac_addr(app->pf, repr, port);
cmsg_port_id = nfp_flower_cmsg_phys_port(phys_port); err = nfp_repr_init(app, repr, --- a/drivers/net/ethernet/netronome/nfp/nfp_app_nic.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_app_nic.c @@ -69,7 +69,7 @@ int nfp_app_nic_vnic_alloc(struct nfp_ap if (err) return err < 0 ? err : 0;
- nfp_net_get_mac_addr(app->pf, nn->port); + nfp_net_get_mac_addr(app->pf, nn->dp.netdev, nn->port);
return 0; } --- a/drivers/net/ethernet/netronome/nfp/nfp_main.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_main.h @@ -171,7 +171,9 @@ void nfp_net_pci_remove(struct nfp_pf *p int nfp_hwmon_register(struct nfp_pf *pf); void nfp_hwmon_unregister(struct nfp_pf *pf);
-void nfp_net_get_mac_addr(struct nfp_pf *pf, struct nfp_port *port); +void +nfp_net_get_mac_addr(struct nfp_pf *pf, struct net_device *netdev, + struct nfp_port *port);
bool nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb);
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_main.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_main.c @@ -67,23 +67,26 @@ /** * nfp_net_get_mac_addr() - Get the MAC address. * @pf: NFP PF handle + * @netdev: net_device to set MAC address on * @port: NFP port structure * * First try to get the MAC address from NSP ETH table. If that * fails generate a random address. */ -void nfp_net_get_mac_addr(struct nfp_pf *pf, struct nfp_port *port) +void +nfp_net_get_mac_addr(struct nfp_pf *pf, struct net_device *netdev, + struct nfp_port *port) { struct nfp_eth_table_port *eth_port;
eth_port = __nfp_port_get_eth_port(port); if (!eth_port) { - eth_hw_addr_random(port->netdev); + eth_hw_addr_random(netdev); return; }
- ether_addr_copy(port->netdev->dev_addr, eth_port->mac_addr); - ether_addr_copy(port->netdev->perm_addr, eth_port->mac_addr); + ether_addr_copy(netdev->dev_addr, eth_port->mac_addr); + ether_addr_copy(netdev->perm_addr, eth_port->mac_addr); }
static struct nfp_eth_table_port * @@ -511,16 +514,18 @@ static int nfp_net_pci_map_mem(struct nf return PTR_ERR(mem); }
- min_size = NFP_MAC_STATS_SIZE * (pf->eth_tbl->max_index + 1); - pf->mac_stats_mem = nfp_rtsym_map(pf->rtbl, "_mac_stats", - "net.macstats", min_size, - &pf->mac_stats_bar); - if (IS_ERR(pf->mac_stats_mem)) { - if (PTR_ERR(pf->mac_stats_mem) != -ENOENT) { - err = PTR_ERR(pf->mac_stats_mem); - goto err_unmap_ctrl; + if (pf->eth_tbl) { + min_size = NFP_MAC_STATS_SIZE * (pf->eth_tbl->max_index + 1); + pf->mac_stats_mem = nfp_rtsym_map(pf->rtbl, "_mac_stats", + "net.macstats", min_size, + &pf->mac_stats_bar); + if (IS_ERR(pf->mac_stats_mem)) { + if (PTR_ERR(pf->mac_stats_mem) != -ENOENT) { + err = PTR_ERR(pf->mac_stats_mem); + goto err_unmap_ctrl; + } + pf->mac_stats_mem = NULL; } - pf->mac_stats_mem = NULL; }
pf->vf_cfg_mem = nfp_net_pf_map_rtsym(pf, "net.vfcfg",