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authorBen Hutchings <bhutchings@solarflare.com>2013-11-14 00:48:56 +0000
committerDavid S. Miller <davem@davemloft.net>2013-11-14 16:22:10 -0500
commita5be8cd3875ca051db857c9d76b253a7e7ea3f22 (patch)
treea9d5b9f6d2597b1fabf95853e70de55e568b435f /drivers/net/ethernet/xscale
parent2ee91e54bd5367bf4123719a4f7203857b28e046 (diff)
downloadlinux-a5be8cd3875ca051db857c9d76b253a7e7ea3f22.tar.gz
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>
Diffstat (limited to 'drivers/net/ethernet/xscale')
-rw-r--r--drivers/net/ethernet/xscale/ixp4xx_eth.c12
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/net/ethernet/xscale/ixp4xx_eth.c b/drivers/net/ethernet/xscale/ixp4xx_eth.c
index e78802e75ea6..bcc224a83734 100644
--- a/drivers/net/ethernet/xscale/ixp4xx_eth.c
+++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c
@@ -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);