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ixp4xx_eth: Validate hwtstamp_config completely before applying it 

hwtstamp_ioctl() should validate all fields of hwtstamp_config
before making any changes.  Currently it sets the TX configuration
before validating the rx_filter field.

Untested as I don't have a cross-compiler to hand.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings 2013-11-14 00:48:56 +00:00 committed by David S. Miller
parent 2ee91e54bd
commit a5be8cd387
1 changed files with 3 additions and 9 deletions
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12
drivers/net/ethernet/xscale/ixp4xx_eth.c
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@ -389,16 +389,8 @@ static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
ch = PORT2CHANNEL(port);
regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
switch (cfg.tx_type) {
case HWTSTAMP_TX_OFF:
port->hwts_tx_en = 0;
break;
case HWTSTAMP_TX_ON:
port->hwts_tx_en = 1;
break;
default:
if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
return -ERANGE;
}
switch (cfg.rx_filter) {
case HWTSTAMP_FILTER_NONE:
@ -416,6 +408,8 @@ static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
return -ERANGE;
}
port->hwts_tx_en = cfg.tx_type == HWTSTAMP_TX_ON;
/* Clear out any old time stamps. */
__raw_writel(TX_SNAPSHOT_LOCKED | RX_SNAPSHOT_LOCKED,
&regs->channel[ch].ch_event);