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net: annotate writes on dev->mtu from ndo_change_mtu()

Browse Source 
Simon reported that ndo_change_mtu() methods were never
updated to use WRITE_ONCE(dev->mtu, new_mtu) as hinted
in commit 501a90c945 ("inet: protect against too small
mtu values.")

We read dev->mtu without holding RTNL in many places,
with READ_ONCE() annotations.

It is time to take care of ndo_change_mtu() methods
to use corresponding WRITE_ONCE()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Simon Horman <horms@kernel.org>
Closes: https://lore.kernel.org/netdev/20240505144608.GB67882@kernel.org/
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Simon Horman <horms@kernel.org>
Acked-by: Shannon Nelson <shannon.nelson@amd.com>
Link: https://lore.kernel.org/r/20240506102812.3025432-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2024-05-06 10:28:12 +00:00 committed by Jakub Kicinski
parent feb8c2b76e
commit 1eb2cded45
153 changed files with 174 additions and 173 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/infiniband/ulp/ipoib/ipoib_main.c
View File

@ -238,7 +238,7 @@ static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n",
priv->mcast_mtu);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}
@ -265,7 +265,7 @@ static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
if (carrier_status)
netif_carrier_on(dev);
} else {
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
}
return ret;

2
drivers/net/bonding/bond_main.c
View File

@ -4710,7 +4710,7 @@ static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
}
}
bond_dev->mtu = new_mtu;
WRITE_ONCE(bond_dev->mtu, new_mtu);
return 0;

2
drivers/net/can/dev/dev.c
View File

@ -338,7 +338,7 @@ int can_change_mtu(struct net_device *dev, int new_mtu)
return -EINVAL;
}
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}
EXPORT_SYMBOL_GPL(can_change_mtu);

2
drivers/net/can/vcan.c
View File

@ -140,7 +140,7 @@ static int vcan_change_mtu(struct net_device *dev, int new_mtu)
!can_is_canxl_dev_mtu(new_mtu))
return -EINVAL;
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}

2
drivers/net/can/vxcan.c
View File

@ -135,7 +135,7 @@ static int vxcan_change_mtu(struct net_device *dev, int new_mtu)
!can_is_canxl_dev_mtu(new_mtu))
return -EINVAL;
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}

2
drivers/net/ethernet/agere/et131x.c
View File

@ -3852,7 +3852,7 @@ static int et131x_change_mtu(struct net_device *netdev, int new_mtu)
et131x_disable_txrx(netdev);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
et131x_adapter_memory_free(adapter);

2
drivers/net/ethernet/alteon/acenic.c
View File

@ -2539,7 +2539,7 @@ static int ace_change_mtu(struct net_device *dev, int new_mtu)
struct ace_regs __iomem *regs = ap->regs;
writel(new_mtu + ETH_HLEN + 4, &regs->IfMtu);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
if (new_mtu > ACE_STD_MTU) {
if (!(ap->jumbo)) {

2
drivers/net/ethernet/altera/altera_tse_main.c
View File

@ -788,7 +788,7 @@ static int tse_change_mtu(struct net_device *dev, int new_mtu)
return -EBUSY;
}
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
netdev_update_features(dev);
return 0;

2
drivers/net/ethernet/amazon/ena/ena_netdev.c
View File

@ -104,7 +104,7 @@ static int ena_change_mtu(struct net_device *dev, int new_mtu)
if (!ret) {
netif_dbg(adapter, drv, dev, "Set MTU to %d\n", new_mtu);
update_rx_ring_mtu(adapter, new_mtu);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
} else {
netif_err(adapter, drv, dev, "Failed to set MTU to %d\n",
new_mtu);

6
drivers/net/ethernet/amd/amd8111e.c
View File

@ -1520,9 +1520,9 @@ static int amd8111e_change_mtu(struct net_device *dev, int new_mtu)
if (!netif_running(dev)) {
/* new_mtu will be used
* when device starts netxt time
* when device starts next time
*/
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}
@ -1531,7 +1531,7 @@ static int amd8111e_change_mtu(struct net_device *dev, int new_mtu)
/* stop the chip */
writel(RUN, lp->mmio + CMD0);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
err = amd8111e_restart(dev);
spin_unlock_irq(&lp->lock);

2
drivers/net/ethernet/amd/xgbe/xgbe-drv.c
View File

@ -2070,7 +2070,7 @@ static int xgbe_change_mtu(struct net_device *netdev, int mtu)
return ret;
pdata->rx_buf_size = ret;
netdev->mtu = mtu;
WRITE_ONCE(netdev->mtu, mtu);
xgbe_restart_dev(pdata);

2
drivers/net/ethernet/apm/xgene/xgene_enet_main.c
View File

@ -1530,7 +1530,7 @@ static int xgene_change_mtu(struct net_device *ndev, int new_mtu)
frame_size = (new_mtu > ETH_DATA_LEN) ? (new_mtu + 18) : 0x600;
xgene_enet_close(ndev);
ndev->mtu = new_mtu;
WRITE_ONCE(ndev->mtu, new_mtu);
pdata->mac_ops->set_framesize(pdata, frame_size);
xgene_enet_open(ndev);

2
drivers/net/ethernet/aquantia/atlantic/aq_main.c
View File

@ -146,7 +146,7 @@ static int aq_ndev_change_mtu(struct net_device *ndev, int new_mtu)
if (err < 0)
goto err_exit;
ndev->mtu = new_mtu;
WRITE_ONCE(ndev->mtu, new_mtu);
err_exit:
return err;

2
drivers/net/ethernet/atheros/ag71xx.c
View File

@ -1788,7 +1788,7 @@ static int ag71xx_change_mtu(struct net_device *ndev, int new_mtu)
{
struct ag71xx *ag = netdev_priv(ndev);
ndev->mtu = new_mtu;
WRITE_ONCE(ndev->mtu, new_mtu);
ag71xx_wr(ag, AG71XX_REG_MAC_MFL,
ag71xx_max_frame_len(ndev->mtu));

2
drivers/net/ethernet/atheros/alx/main.c
View File

@ -1176,7 +1176,7 @@ static int alx_change_mtu(struct net_device *netdev, int mtu)
struct alx_priv *alx = netdev_priv(netdev);
int max_frame = ALX_MAX_FRAME_LEN(mtu);
netdev->mtu = mtu;
WRITE_ONCE(netdev->mtu, mtu);
alx->hw.mtu = mtu;
alx->rxbuf_size = max(max_frame, ALX_DEF_RXBUF_SIZE);
netdev_update_features(netdev);

2
drivers/net/ethernet/atheros/atl1c/atl1c_main.c
View File

@ -561,7 +561,7 @@ static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
if (netif_running(netdev)) {
while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
msleep(1);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
adapter->hw.max_frame_size = new_mtu;
atl1c_set_rxbufsize(adapter, netdev);
atl1c_down(adapter);

2
drivers/net/ethernet/atheros/atl1e/atl1e_main.c
View File

@ -428,7 +428,7 @@ static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
if (netif_running(netdev)) {
while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
msleep(1);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
adapter->hw.max_frame_size = new_mtu;
adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
atl1e_down(adapter);

2
drivers/net/ethernet/atheros/atlx/atl1.c
View File

@ -2687,7 +2687,7 @@ static int atl1_change_mtu(struct net_device *netdev, int new_mtu)
adapter->rx_buffer_len = (max_frame + 7) & ~7;
adapter->hw.rx_jumbo_th = adapter->rx_buffer_len / 8;
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (netif_running(netdev)) {
atl1_down(adapter);
atl1_up(adapter);

2
drivers/net/ethernet/atheros/atlx/atl2.c
View File

@ -905,7 +905,7 @@ static int atl2_change_mtu(struct net_device *netdev, int new_mtu)
struct atl2_hw *hw = &adapter->hw;
/* set MTU */
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
hw->max_frame_size = new_mtu;
ATL2_WRITE_REG(hw, REG_MTU, new_mtu + ETH_HLEN +
VLAN_HLEN + ETH_FCS_LEN);

4
drivers/net/ethernet/broadcom/b44.c
View File

@ -1042,13 +1042,13 @@ static int b44_change_mtu(struct net_device *dev, int new_mtu)
/* We'll just catch it later when the
* device is up'd.
*/
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}
spin_lock_irq(&bp->lock);
b44_halt(bp);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
b44_init_rings(bp);
b44_init_hw(bp, B44_FULL_RESET);
spin_unlock_irq(&bp->lock);

2
drivers/net/ethernet/broadcom/bcm63xx_enet.c
View File

@ -1652,7 +1652,7 @@ static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
priv->rx_frag_size = SKB_DATA_ALIGN(priv->rx_buf_offset + priv->rx_buf_size) +
SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}

2
drivers/net/ethernet/broadcom/bnx2.c
View File

@ -7912,7 +7912,7 @@ bnx2_change_mtu(struct net_device *dev, int new_mtu)
{
struct bnx2 *bp = netdev_priv(dev);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return bnx2_change_ring_size(bp, bp->rx_ring_size, bp->tx_ring_size,
false);
}

2
drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
View File

@ -4902,7 +4902,7 @@ int bnx2x_change_mtu(struct net_device *dev, int new_mtu)
* because the actual alloc size is
* only updated as part of load
*/
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
if (!bnx2x_mtu_allows_gro(new_mtu))
dev->features &= ~NETIF_F_GRO_HW;

2
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -14280,7 +14280,7 @@ static int bnxt_change_mtu(struct net_device *dev, int new_mtu)
if (netif_running(dev))
bnxt_close_nic(bp, true, false);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
bnxt_set_ring_params(bp);
if (netif_running(dev))

2
drivers/net/ethernet/broadcom/tg3.c
View File

@ -14295,7 +14295,7 @@ static void tg3_set_rx_mode(struct net_device *dev)
static inline void tg3_set_mtu(struct net_device *dev, struct tg3 *tp,
int new_mtu)
{
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
if (new_mtu > ETH_DATA_LEN) {
if (tg3_flag(tp, 5780_CLASS)) {

2
drivers/net/ethernet/brocade/bna/bnad.c
View File

@ -3276,7 +3276,7 @@ bnad_change_mtu(struct net_device *netdev, int new_mtu)
mutex_lock(&bnad->conf_mutex);
mtu = netdev->mtu;
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
frame = BNAD_FRAME_SIZE(mtu);
new_frame = BNAD_FRAME_SIZE(new_mtu);

2
drivers/net/ethernet/cadence/macb_main.c
View File

@ -3022,7 +3022,7 @@ static int macb_change_mtu(struct net_device *dev, int new_mtu)
if (netif_running(dev))
return -EBUSY;
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}

2
drivers/net/ethernet/calxeda/xgmac.c
View File

@ -1358,7 +1358,7 @@ static int xgmac_change_mtu(struct net_device *dev, int new_mtu)
/* Bring interface down, change mtu and bring interface back up */
xgmac_stop(dev);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return xgmac_open(dev);
}

2
drivers/net/ethernet/cavium/liquidio/lio_core.c
View File

@ -1262,7 +1262,7 @@ int liquidio_change_mtu(struct net_device *netdev, int new_mtu)
return -EINVAL;
}
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
lio->mtu = new_mtu;
WRITE_ONCE(sc->caller_is_done, true);

2
drivers/net/ethernet/cavium/liquidio/lio_vf_rep.c
View File

@ -218,7 +218,7 @@ lio_vf_rep_change_mtu(struct net_device *ndev, int new_mtu)
return -EIO;
}
ndev->mtu = new_mtu;
WRITE_ONCE(ndev->mtu, new_mtu);
return 0;
}

2
drivers/net/ethernet/cavium/octeon/octeon_mgmt.c
View File

@ -649,7 +649,7 @@ static int octeon_mgmt_change_mtu(struct net_device *netdev, int new_mtu)
struct octeon_mgmt *p = netdev_priv(netdev);
int max_packet = new_mtu + ETH_HLEN + ETH_FCS_LEN;
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
/* HW lifts the limit if the frame is VLAN tagged
* (+4 bytes per each tag, up to two tags)

2
drivers/net/ethernet/cavium/thunder/nicvf_main.c
View File

@ -1589,7 +1589,7 @@ static int nicvf_change_mtu(struct net_device *netdev, int new_mtu)
return -EINVAL;
}
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (!netif_running(netdev))
return 0;

2
drivers/net/ethernet/chelsio/cxgb/cxgb2.c
View File

@ -844,7 +844,7 @@ static int t1_change_mtu(struct net_device *dev, int new_mtu)
return -EOPNOTSUPP;
if ((ret = mac->ops->set_mtu(mac, new_mtu)))
return ret;
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}

2
drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
View File

@ -2559,7 +2559,7 @@ static int cxgb_change_mtu(struct net_device *dev, int new_mtu)
if ((ret = t3_mac_set_mtu(&pi->mac, new_mtu)))
return ret;
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
init_port_mtus(adapter);
if (adapter->params.rev == 0 && offload_running(adapter))
t3_load_mtus(adapter, adapter->params.mtus,

2
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
View File

@ -3180,7 +3180,7 @@ static int cxgb_change_mtu(struct net_device *dev, int new_mtu)
ret = t4_set_rxmode(pi->adapter, pi->adapter->mbox, pi->viid,
pi->viid_mirror, new_mtu, -1, -1, -1, -1, true);
if (!ret)
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return ret;
}

2
drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
View File

@ -1169,7 +1169,7 @@ static int cxgb4vf_change_mtu(struct net_device *dev, int new_mtu)
ret = t4vf_set_rxmode(pi->adapter, pi->viid, new_mtu,
-1, -1, -1, -1, true);
if (!ret)
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return ret;
}

2
drivers/net/ethernet/cisco/enic/enic_main.c
View File

@ -2027,7 +2027,7 @@ static int _enic_change_mtu(struct net_device *netdev, int new_mtu)
return err;
}
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (running) {
err = enic_open(netdev);

2
drivers/net/ethernet/cortina/gemini.c
View File

@ -1978,7 +1978,7 @@ static int gmac_change_mtu(struct net_device *netdev, int new_mtu)
gmac_disable_tx_rx(netdev);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
gmac_update_config0_reg(netdev, max_len << CONFIG0_MAXLEN_SHIFT,
CONFIG0_MAXLEN_MASK);

2
drivers/net/ethernet/dlink/sundance.c
View File

@ -708,7 +708,7 @@ static int change_mtu(struct net_device *dev, int new_mtu)
{
if (netif_running(dev))
return -EBUSY;
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}

2
drivers/net/ethernet/faraday/ftmac100.c
View File

@ -1092,7 +1092,7 @@ static int ftmac100_change_mtu(struct net_device *netdev, int mtu)
}
iowrite32(maccr, priv->base + FTMAC100_OFFSET_MACCR);
netdev->mtu = mtu;
WRITE_ONCE(netdev->mtu, mtu);
return 0;
}

2
drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
View File

@ -2995,7 +2995,7 @@ static int dpaa_change_mtu(struct net_device *net_dev, int new_mtu)
if (priv->xdp_prog && !xdp_validate_mtu(priv, new_mtu))
return -EINVAL;
net_dev->mtu = new_mtu;
WRITE_ONCE(net_dev->mtu, new_mtu);
return 0;
}

2
drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
View File

@ -2698,7 +2698,7 @@ static int dpaa2_eth_change_mtu(struct net_device *dev, int new_mtu)
return err;
out:
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}

2
drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c
View File

@ -590,7 +590,7 @@ static int dpaa2_switch_port_change_mtu(struct net_device *netdev, int mtu)
return err;
}
netdev->mtu = mtu;
WRITE_ONCE(netdev->mtu, mtu);
return 0;
}

2
drivers/net/ethernet/freescale/gianfar.c
View File

@ -2026,7 +2026,7 @@ static int gfar_change_mtu(struct net_device *dev, int new_mtu)
if (dev->flags & IFF_UP)
stop_gfar(dev);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
if (dev->flags & IFF_UP)
startup_gfar(dev);

2
drivers/net/ethernet/fungible/funeth/funeth_main.c
View File

@ -927,7 +927,7 @@ static int fun_change_mtu(struct net_device *netdev, int new_mtu)
rc = fun_port_write_cmd(fp, FUN_ADMIN_PORT_KEY_MTU, new_mtu);
if (!rc)
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
return rc;
}

2
drivers/net/ethernet/hisilicon/hns/hns_enet.c
View File

@ -1777,7 +1777,7 @@ static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
}
/* finally, set new mtu to netdevice */
ndev->mtu = new_mtu;
WRITE_ONCE(ndev->mtu, new_mtu);
out:
if (if_running) {

2
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
View File

@ -2761,7 +2761,7 @@ static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu)
netdev_err(netdev, "failed to change MTU in hardware %d\n",
ret);
else
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
return ret;
}

2
drivers/net/ethernet/huawei/hinic/hinic_main.c
View File

@ -581,7 +581,7 @@ static int hinic_change_mtu(struct net_device *netdev, int new_mtu)
if (err)
netif_err(nic_dev, drv, netdev, "Failed to set port mtu\n");
else
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
return err;
}

4
drivers/net/ethernet/ibm/emac/core.c
View File

@ -1098,7 +1098,7 @@ static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu)
/* This is to prevent starting RX channel in emac_rx_enable() */
set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
dev->ndev->mtu = new_mtu;
WRITE_ONCE(dev->ndev->mtu, new_mtu);
emac_full_tx_reset(dev);
}
@ -1130,7 +1130,7 @@ static int emac_change_mtu(struct net_device *ndev, int new_mtu)
}
if (!ret) {
ndev->mtu = new_mtu;
WRITE_ONCE(ndev->mtu, new_mtu);
dev->rx_skb_size = emac_rx_skb_size(new_mtu);
dev->rx_sync_size = emac_rx_sync_size(new_mtu);
}

2
drivers/net/ethernet/ibm/ibmveth.c
View File

@ -1537,7 +1537,7 @@ static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
adapter->rx_buff_pool[i].active = 1;
if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) {
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
vio_cmo_set_dev_desired(viodev,
ibmveth_get_desired_dma
(viodev));

2
drivers/net/ethernet/intel/e1000/e1000_main.c
View File

@ -3569,7 +3569,7 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
netdev_dbg(netdev, "changing MTU from %d to %d\n",
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (netif_running(netdev))
e1000_up(adapter);

2
drivers/net/ethernet/intel/e1000e/netdev.c
View File

@ -6038,7 +6038,7 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
adapter->max_frame_size = max_frame;
netdev_dbg(netdev, "changing MTU from %d to %d\n",
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
pm_runtime_get_sync(netdev->dev.parent);

2
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -2961,7 +2961,7 @@ static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
netdev_dbg(netdev, "changing MTU from %d to %d\n",
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (netif_running(netdev))
i40e_vsi_reinit_locked(vsi);
set_bit(__I40E_CLIENT_SERVICE_REQUESTED, pf->state);

2
drivers/net/ethernet/intel/iavf/iavf_main.c
View File

@ -4296,7 +4296,7 @@ static int iavf_change_mtu(struct net_device *netdev, int new_mtu)
netdev_dbg(netdev, "changing MTU from %d to %d\n",
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (netif_running(netdev)) {
iavf_schedule_reset(adapter, IAVF_FLAG_RESET_NEEDED);

2
drivers/net/ethernet/intel/ice/ice_main.c
View File

@ -7770,7 +7770,7 @@ static int ice_change_mtu(struct net_device *netdev, int new_mtu)
return -EBUSY;
}
netdev->mtu = (unsigned int)new_mtu;
WRITE_ONCE(netdev->mtu, (unsigned int)new_mtu);
err = ice_down_up(vsi);
if (err)
return err;

2
drivers/net/ethernet/intel/idpf/idpf_lib.c
View File

@ -2234,7 +2234,7 @@ static int idpf_change_mtu(struct net_device *netdev, int new_mtu)
idpf_vport_ctrl_lock(netdev);
vport = idpf_netdev_to_vport(netdev);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
err = idpf_initiate_soft_reset(vport, IDPF_SR_MTU_CHANGE);

2
drivers/net/ethernet/intel/igb/igb_main.c
View File

@ -6641,7 +6641,7 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)
netdev_dbg(netdev, "changing MTU from %d to %d\n",
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (netif_running(netdev))
igb_up(adapter);

2
drivers/net/ethernet/intel/igbvf/netdev.c
View File

@ -2434,7 +2434,7 @@ static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
netdev_dbg(netdev, "changing MTU from %d to %d\n",
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (netif_running(netdev))
igbvf_up(adapter);

2
drivers/net/ethernet/intel/igc/igc_main.c
View File

@ -5275,7 +5275,7 @@ static int igc_change_mtu(struct net_device *netdev, int new_mtu)
igc_down(adapter);
netdev_dbg(netdev, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (netif_running(netdev))
igc_up(adapter);

2
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -6847,7 +6847,7 @@ static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
netdev->mtu, new_mtu);
/* must set new MTU before calling down or up */
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (netif_running(netdev))
ixgbe_reinit_locked(adapter);

2
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
View File

@ -4292,7 +4292,7 @@ static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
netdev->mtu, new_mtu);
/* must set new MTU before calling down or up */
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (netif_running(netdev))
ixgbevf_reinit_locked(adapter);

2
drivers/net/ethernet/jme.c
View File

@ -2301,7 +2301,7 @@ jme_change_mtu(struct net_device *netdev, int new_mtu)
{
struct jme_adapter *jme = netdev_priv(netdev);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
netdev_update_features(netdev);
jme_restart_rx_engine(jme);

2
drivers/net/ethernet/lantiq_etop.c
View File

@ -519,7 +519,7 @@ ltq_etop_change_mtu(struct net_device *dev, int new_mtu)
struct ltq_etop_priv *priv = netdev_priv(dev);
unsigned long flags;
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
spin_lock_irqsave(&priv->lock, flags);
ltq_etop_w32((ETOP_PLEN_UNDER << 16) | new_mtu, LTQ_ETOP_IGPLEN);

4
drivers/net/ethernet/lantiq_xrx200.c
View File

@ -419,7 +419,7 @@ xrx200_change_mtu(struct net_device *net_dev, int new_mtu)
int curr_desc;
int ret = 0;
net_dev->mtu = new_mtu;
WRITE_ONCE(net_dev->mtu, new_mtu);
priv->rx_buf_size = xrx200_buffer_size(new_mtu);
priv->rx_skb_size = xrx200_skb_size(priv->rx_buf_size);
@ -440,7 +440,7 @@ xrx200_change_mtu(struct net_device *net_dev, int new_mtu)
buff = ch_rx->rx_buff[ch_rx->dma.desc];
ret = xrx200_alloc_buf(ch_rx, netdev_alloc_frag);
if (ret) {
net_dev->mtu = old_mtu;
WRITE_ONCE(net_dev->mtu, old_mtu);
priv->rx_buf_size = xrx200_buffer_size(old_mtu);
priv->rx_skb_size = xrx200_skb_size(priv->rx_buf_size);
break;

2
drivers/net/ethernet/marvell/mv643xx_eth.c
View File

@ -2562,7 +2562,7 @@ static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
{
struct mv643xx_eth_private *mp = netdev_priv(dev);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
mv643xx_eth_recalc_skb_size(mp);
tx_set_rate(mp, 1000000000, 16777216);

2
drivers/net/ethernet/marvell/mvneta.c
View File

@ -3861,7 +3861,7 @@ static int mvneta_change_mtu(struct net_device *dev, int mtu)
return -EINVAL;
}
dev->mtu = mtu;
WRITE_ONCE(dev->mtu, mtu);
if (!netif_running(dev)) {
if (pp->bm_priv)

2
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
View File

@ -1375,7 +1375,7 @@ static int mvpp2_bm_update_mtu(struct net_device *dev, int mtu)
}
out_set:
dev->mtu = mtu;
WRITE_ONCE(dev->mtu, mtu);
dev->wanted_features = dev->features;
netdev_update_features(dev);

2
drivers/net/ethernet/marvell/octeon_ep/octep_main.c
View File

@ -1096,7 +1096,7 @@ static int octep_change_mtu(struct net_device *netdev, int new_mtu)
true);
if (!err) {
oct->link_info.mtu = new_mtu;
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
}
return err;

2
drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c
View File

@ -881,7 +881,7 @@ static int octep_vf_change_mtu(struct net_device *netdev, int new_mtu)
err = octep_vf_mbox_set_mtu(oct, new_mtu);
if (!err) {
oct->link_info.mtu = new_mtu;
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
}
return err;
}

2
drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
View File

@ -67,7 +67,7 @@ static int otx2_change_mtu(struct net_device *netdev, int new_mtu)
netdev_info(netdev, "Changing MTU from %d to %d\n",
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (if_up)
err = otx2_open(netdev);

2
drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
View File

@ -456,7 +456,7 @@ static int otx2vf_change_mtu(struct net_device *netdev, int new_mtu)
netdev_info(netdev, "Changing MTU from %d to %d\n",
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (if_up)
err = otx2vf_open(netdev);

2
drivers/net/ethernet/marvell/prestera/prestera_main.c
View File

@ -489,7 +489,7 @@ static int prestera_port_change_mtu(struct net_device *dev, int mtu)
if (err)
return err;
dev->mtu = mtu;
WRITE_ONCE(dev->mtu, mtu);
return 0;
}

2
drivers/net/ethernet/marvell/pxa168_eth.c
View File

@ -1188,7 +1188,7 @@ static int pxa168_eth_change_mtu(struct net_device *dev, int mtu)
{
struct pxa168_eth_private *pep = netdev_priv(dev);
dev->mtu = mtu;
WRITE_ONCE(dev->mtu, mtu);
set_port_config_ext(pep);
if (!netif_running(dev))

4
drivers/net/ethernet/marvell/skge.c
View File

@ -2905,13 +2905,13 @@ static int skge_change_mtu(struct net_device *dev, int new_mtu)
int err;
if (!netif_running(dev)) {
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}
skge_down(dev);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
err = skge_up(dev);
if (err)

4
drivers/net/ethernet/marvell/sky2.c
View File

@ -2384,7 +2384,7 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu)
u32 imask;
if (!netif_running(dev)) {
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
netdev_update_features(dev);
return 0;
}
@ -2407,7 +2407,7 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu)
sky2_rx_stop(sky2);
sky2_rx_clean(sky2);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
netdev_update_features(dev);
mode = DATA_BLIND_VAL(DATA_BLIND_DEF) | GM_SMOD_VLAN_ENA;

2
drivers/net/ethernet/mediatek/mtk_eth_soc.c
View File

@ -4055,7 +4055,7 @@ static int mtk_change_mtu(struct net_device *dev, int new_mtu)
}
mtk_set_mcr_max_rx(mac, length);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}

4
drivers/net/ethernet/mellanox/mlx4/en_netdev.c
View File

@ -1649,7 +1649,7 @@ int mlx4_en_start_port(struct net_device *dev)
sizeof(struct ethtool_flow_id) * MAX_NUM_OF_FS_RULES);
/* Calculate Rx buf size */
dev->mtu = min(dev->mtu, priv->max_mtu);
WRITE_ONCE(dev->mtu, min(dev->mtu, priv->max_mtu));
mlx4_en_calc_rx_buf(dev);
en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
@ -2394,7 +2394,7 @@ static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
!mlx4_en_check_xdp_mtu(dev, new_mtu))
return -EOPNOTSUPP;
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
if (netif_running(dev)) {
mutex_lock(&mdev->state_lock);

2
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -4525,7 +4525,7 @@ int mlx5e_change_mtu(struct net_device *netdev, int new_mtu,
err = mlx5e_safe_switch_params(priv, &new_params, preactivate, NULL, reset);
out:
netdev->mtu = params->sw_mtu;
WRITE_ONCE(netdev->mtu, params->sw_mtu);
mutex_unlock(&priv->state_lock);
return err;
}

2
drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c
View File

@ -531,7 +531,7 @@ static int mlx5i_change_mtu(struct net_device *netdev, int new_mtu)
if (err)
goto out;
netdev->mtu = new_params.sw_mtu;
WRITE_ONCE(netdev->mtu, new_params.sw_mtu);
out:
mutex_unlock(&priv->state_lock);

2
drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib_vlan.c
View File

@ -280,7 +280,7 @@ static int mlx5i_pkey_change_mtu(struct net_device *netdev, int new_mtu)
struct mlx5e_priv *priv = mlx5i_epriv(netdev);
mutex_lock(&priv->state_lock);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
mutex_unlock(&priv->state_lock);
return 0;

2
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View File

@ -825,7 +825,7 @@ static int mlxsw_sp_port_change_mtu(struct net_device *dev, int mtu)
err = mlxsw_sp_port_mtu_set(mlxsw_sp_port, mtu);
if (err)
goto err_port_mtu_set;
dev->mtu = mtu;
WRITE_ONCE(dev->mtu, mtu);
return 0;
err_port_mtu_set:

2
drivers/net/ethernet/micrel/ksz884x.c
View File

@ -5427,7 +5427,7 @@ static int netdev_change_mtu(struct net_device *dev, int new_mtu)
}
hw_mtu = (hw_mtu + 3) & ~3;
hw_priv->mtu = hw_mtu;
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}

2
drivers/net/ethernet/microchip/lan743x_main.c
View File

@ -3184,7 +3184,7 @@ static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
ret = lan743x_mac_set_mtu(adapter, new_mtu);
if (!ret)
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
return ret;
}

2
drivers/net/ethernet/microchip/lan966x/lan966x_main.c
View File

@ -402,7 +402,7 @@ static int lan966x_port_change_mtu(struct net_device *dev, int new_mtu)
lan_wr(DEV_MAC_MAXLEN_CFG_MAX_LEN_SET(LAN966X_HW_MTU(new_mtu)),
lan966x, DEV_MAC_MAXLEN_CFG(port->chip_port));
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
if (!lan966x->fdma)
return 0;

4
drivers/net/ethernet/microsoft/mana/mana_en.c
View File

@ -690,12 +690,12 @@ static int mana_change_mtu(struct net_device *ndev, int new_mtu)
goto out;
}
ndev->mtu = new_mtu;
WRITE_ONCE(ndev->mtu, new_mtu);
err = mana_attach(ndev);
if (err) {
netdev_err(ndev, "mana_attach failed: %d\n", err);
ndev->mtu = old_mtu;
WRITE_ONCE(ndev->mtu, old_mtu);
}
out:

8
drivers/net/ethernet/myricom/myri10ge/myri10ge.c
View File

@ -3036,11 +3036,11 @@ static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
/* if we change the mtu on an active device, we must
* reset the device so the firmware sees the change */
myri10ge_close(dev);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
myri10ge_open(dev);
} else
dev->mtu = new_mtu;
} else {
WRITE_ONCE(dev->mtu, new_mtu);
}
return 0;
}

2
drivers/net/ethernet/natsemi/natsemi.c
View File

@ -2526,7 +2526,7 @@ static void __set_rx_mode(struct net_device *dev)
static int natsemi_change_mtu(struct net_device *dev, int new_mtu)
{
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
/* synchronized against open : rtnl_lock() held by caller */
if (netif_running(dev)) {

2
drivers/net/ethernet/neterion/s2io.c
View File

@ -6637,7 +6637,7 @@ static int s2io_change_mtu(struct net_device *dev, int new_mtu)
struct s2io_nic *sp = netdev_priv(dev);
int ret = 0;
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
if (netif_running(dev)) {
s2io_stop_all_tx_queue(sp);
s2io_card_down(sp);

2
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
View File

@ -1526,7 +1526,7 @@ static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp)
*dp = nn->dp;
nn->dp = new_dp;
nn->dp.netdev->mtu = new_dp.mtu;
WRITE_ONCE(nn->dp.netdev->mtu, new_dp.mtu);
if (!netif_is_rxfh_configured(nn->dp.netdev))
nfp_net_rss_init_itbl(nn);

2
drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
View File

@ -177,7 +177,7 @@ static int nfp_repr_change_mtu(struct net_device *netdev, int new_mtu)
if (err)
return err;
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
return 0;
}

2
drivers/net/ethernet/ni/nixge.c
View File

@ -946,7 +946,7 @@ static int nixge_change_mtu(struct net_device *ndev, int new_mtu)
NIXGE_MAX_JUMBO_FRAME_SIZE)
return -EINVAL;
ndev->mtu = new_mtu;
WRITE_ONCE(ndev->mtu, new_mtu);
return 0;
}

2
drivers/net/ethernet/nvidia/forcedeth.c
View File

@ -3098,7 +3098,7 @@ static int nv_change_mtu(struct net_device *dev, int new_mtu)
int old_mtu;
old_mtu = dev->mtu;
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
/* return early if the buffer sizes will not change */
if (old_mtu <= ETH_DATA_LEN && new_mtu <= ETH_DATA_LEN)

2
drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
View File

@ -2184,7 +2184,7 @@ static int pch_gbe_change_mtu(struct net_device *netdev, int new_mtu)
}
} else {
pch_gbe_reset(adapter);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
adapter->hw.mac.max_frame_size = max_frame;
}

2
drivers/net/ethernet/pasemi/pasemi_mac.c
View File

@ -1639,7 +1639,7 @@ static int pasemi_mac_change_mtu(struct net_device *dev, int new_mtu)
reg |= PAS_MAC_CFG_MACCFG_MAXF(new_mtu + ETH_HLEN + 4);
write_mac_reg(mac, PAS_MAC_CFG_MACCFG, reg);
dev->mtu = new_mtu;
WRITE_ONCE(dev->mtu, new_mtu);
/* MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
mac->bufsz = new_mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128;

4
drivers/net/ethernet/pensando/ionic/ionic_lif.c
View File

@ -1761,13 +1761,13 @@ static int ionic_change_mtu(struct net_device *netdev, int new_mtu)
/* if we're not running, nothing more to do */
if (!netif_running(netdev)) {
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
return 0;
}
mutex_lock(&lif->queue_lock);
ionic_stop_queues_reconfig(lif);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
err = ionic_start_queues_reconfig(lif);
mutex_unlock(&lif->queue_lock);

2
drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.c
View File

@ -960,7 +960,7 @@ int netxen_nic_change_mtu(struct net_device *netdev, int mtu)
rc = adapter->set_mtu(adapter, mtu);
if (!rc)
netdev->mtu = mtu;
WRITE_ONCE(netdev->mtu, mtu);
return rc;
}

2
drivers/net/ethernet/qlogic/qede/qede_ethtool.c
View File

@ -1026,7 +1026,7 @@ static int qede_get_regs_len(struct net_device *ndev)
static void qede_update_mtu(struct qede_dev *edev,
struct qede_reload_args *args)
{
edev->ndev->mtu = args->u.mtu;
WRITE_ONCE(edev->ndev->mtu, args->u.mtu);
}
/* Netdevice NDOs */

2
drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c
View File

@ -1015,7 +1015,7 @@ int qlcnic_change_mtu(struct net_device *netdev, int mtu)
rc = qlcnic_fw_cmd_set_mtu(adapter, mtu);
if (!rc)
netdev->mtu = mtu;
WRITE_ONCE(netdev->mtu, mtu);
return rc;
}

2
drivers/net/ethernet/qualcomm/emac/emac.c
View File

@ -216,7 +216,7 @@ static int emac_change_mtu(struct net_device *netdev, int new_mtu)
netif_dbg(adpt, hw, adpt->netdev,
"changing MTU from %d to %d\n", netdev->mtu,
new_mtu);
netdev->mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
if (netif_running(netdev))
return emac_reinit_locked(adpt);

2
drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c
View File

@ -90,7 +90,7 @@ static int rmnet_vnd_change_mtu(struct net_device *rmnet_dev, int new_mtu)
new_mtu > (priv->real_dev->mtu - headroom))
return -EINVAL;
rmnet_dev->mtu = new_mtu;
WRITE_ONCE(rmnet_dev->mtu, new_mtu);
return 0;
}

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