[PATCH RESEND net-next 0/3] of_get_mac_address ERR_PTR fixes

[PATCH RESEND net-next 0/3] of_get_mac_address ERR_PTR fixes

[Petr Štetiar]

Hi,

this patch series is an attempt to fix the mess, I've somehow managed to
introduce.

First patch in this series is defacto v5 of the previous 05/10 patch in the
series, but since the v4 of this 05/10 patch wasn't picked up by the
patchwork for some unknown reason, this patch wasn't applied with the other
9 patches in the series, so I'm resending it as a separate patch of this
fixup series again.

Second patch is a result of this rebase against net-next tree, where I was
checking again all current users of of_get_mac_address and found out, that
there's new one in DSA, so I've converted this user to the new ERR_PTR
encoded error value as well.

Third patch which was sent as v5 wasn't considered for merge, but I still
think, that we need to check for possible NULL value, thus current IS_ERR
check isn't sufficient and we need to use IS_ERR_OR_NULL instead.

Cheers,

Petr

Petr Štetiar (3):
  net: ethernet: support of_get_mac_address new ERR_PTR error
  net: dsa: support of_get_mac_address new ERR_PTR error
  staging: octeon-ethernet: Fix of_get_mac_address ERR_PTR check

 drivers/net/ethernet/aeroflex/greth.c                 | 2 +-
 drivers/net/ethernet/allwinner/sun4i-emac.c           | 2 +-
 drivers/net/ethernet/altera/altera_tse_main.c         | 2 +-
 drivers/net/ethernet/arc/emac_main.c                  | 2 +-
 drivers/net/ethernet/aurora/nb8800.c                  | 2 +-
 drivers/net/ethernet/broadcom/bcmsysport.c            | 2 +-
 drivers/net/ethernet/broadcom/bgmac-bcma.c            | 2 +-
 drivers/net/ethernet/broadcom/bgmac-platform.c        | 2 +-
 drivers/net/ethernet/broadcom/genet/bcmgenet.c        | 2 +-
 drivers/net/ethernet/cavium/octeon/octeon_mgmt.c      | 2 +-
 drivers/net/ethernet/cavium/thunder/thunder_bgx.c     | 2 +-
 drivers/net/ethernet/davicom/dm9000.c                 | 2 +-
 drivers/net/ethernet/ethoc.c                          | 2 +-
 drivers/net/ethernet/ezchip/nps_enet.c                | 2 +-
 drivers/net/ethernet/freescale/fec_main.c             | 2 +-
 drivers/net/ethernet/freescale/fec_mpc52xx.c          | 2 +-
 drivers/net/ethernet/freescale/fman/mac.c             | 2 +-
 drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c | 2 +-
 drivers/net/ethernet/freescale/gianfar.c              | 2 +-
 drivers/net/ethernet/freescale/ucc_geth.c             | 2 +-
 drivers/net/ethernet/hisilicon/hisi_femac.c           | 2 +-
 drivers/net/ethernet/hisilicon/hix5hd2_gmac.c         | 2 +-
 drivers/net/ethernet/lantiq_xrx200.c                  | 2 +-
 drivers/net/ethernet/marvell/mv643xx_eth.c            | 2 +-
 drivers/net/ethernet/marvell/mvneta.c                 | 2 +-
 drivers/net/ethernet/marvell/pxa168_eth.c             | 2 +-
 drivers/net/ethernet/marvell/sky2.c                   | 2 +-
 drivers/net/ethernet/mediatek/mtk_eth_soc.c           | 2 +-
 drivers/net/ethernet/micrel/ks8851.c                  | 2 +-
 drivers/net/ethernet/micrel/ks8851_mll.c              | 2 +-
 drivers/net/ethernet/nxp/lpc_eth.c                    | 2 +-
 drivers/net/ethernet/qualcomm/qca_spi.c               | 2 +-
 drivers/net/ethernet/qualcomm/qca_uart.c              | 2 +-
 drivers/net/ethernet/renesas/ravb_main.c              | 2 +-
 drivers/net/ethernet/renesas/sh_eth.c                 | 2 +-
 drivers/net/ethernet/samsung/sxgbe/sxgbe_platform.c   | 2 +-
 drivers/net/ethernet/socionext/sni_ave.c              | 2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c     | 2 +-
 drivers/net/ethernet/ti/cpsw.c                        | 2 +-
 drivers/net/ethernet/ti/netcp_core.c                  | 2 +-
 drivers/net/ethernet/wiznet/w5100.c                   | 2 +-
 drivers/net/ethernet/xilinx/ll_temac_main.c           | 2 +-
 drivers/net/ethernet/xilinx/xilinx_axienet_main.c     | 2 +-
 drivers/net/ethernet/xilinx/xilinx_emaclite.c         | 2 +-
 drivers/staging/octeon/ethernet.c                     | 2 +-
 net/dsa/slave.c                                       | 2 +-
 net/ethernet/eth.c                                    | 2 +-
 47 files changed, 47 insertions(+), 47 deletions(-)

-- 
1.9.1

[PATCH RESEND net-next 2/3] net: dsa: support of_get_mac_address new ERR_PTR error

[Petr Štetiar]

There was NVMEM support added to of_get_mac_address, so it could now
return ERR_PTR encoded error values, so we need to adjust all current
users of of_get_mac_address to this new fact.

While at it, remove superfluous is_valid_ether_addr as the MAC address
returned from of_get_mac_address is always valid and checked by
is_valid_ether_addr anyway.

Signed-off-by: Petr Štetiar <ynezz@true.cz>
---
 net/dsa/slave.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 316bce9..2e1deef 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -1418,7 +1418,7 @@ int dsa_slave_create(struct dsa_port *port)
 				NETIF_F_HW_VLAN_CTAG_FILTER;
 	slave_dev->hw_features |= NETIF_F_HW_TC;
 	slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
-	if (port->mac && is_valid_ether_addr(port->mac))
+	if (!IS_ERR_OR_NULL(port->mac))
 		ether_addr_copy(slave_dev->dev_addr, port->mac);
 	else
 		eth_hw_addr_inherit(slave_dev, master);
-- 
1.9.1

[PATCH RESEND net-next 3/3] staging: octeon-ethernet: Fix of_get_mac_address ERR_PTR check

[Petr Štetiar]

Commit 284eb160681c ("staging: octeon-ethernet: support
of_get_mac_address new ERR_PTR error") has introduced checking for
ERR_PTR encoded error value from of_get_mac_address with IS_ERR macro,
which is not sufficient in this case, as the mac variable is set to NULL
initialy and if the kernel is compiled without DT support this NULL
would get passed to IS_ERR, which would lead to the wrong decision and
would pass that NULL pointer and invalid MAC address further.

Fixes: 284eb160681c ("staging: octeon-ethernet: support of_get_mac_address new ERR_PTR error")
Signed-off-by: Petr Štetiar <ynezz@true.cz>
---
 drivers/staging/octeon/ethernet.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/octeon/ethernet.c b/drivers/staging/octeon/ethernet.c
index 2b03018..8847a11c2 100644
--- a/drivers/staging/octeon/ethernet.c
+++ b/drivers/staging/octeon/ethernet.c
@@ -421,7 +421,7 @@ int cvm_oct_common_init(struct net_device *dev)
 	if (priv->of_node)
 		mac = of_get_mac_address(priv->of_node);
 
-	if (!IS_ERR(mac))
+	if (!IS_ERR_OR_NULL(mac))
 		ether_addr_copy(dev->dev_addr, mac);
 	else
 		eth_hw_addr_random(dev);
-- 
1.9.1