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ti_cpsw: Validate hwtstamp_config completely before applying it

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cpsw_hwtstamp_ioctl() should validate all fields of hwtstamp_config,
and the hardware version, before making any changes.  Currently it
sets the TX configuration before validating the rx_filter field
or that the hardware supports timestamping.

Also correct the error code for hardware versions that don't
support timestamping.  ENOTSUPP is used by the NFS implementation
and is not part of userland API; we want EOPNOTSUPP (which glibc
also calls ENOTSUP, with one 'P').

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

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Acked-by: Mugunthan V N <mugunthanvnm@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings 2013-11-14 00:47:36 +00:00 committed by David S. Miller
parent 5f3da32819
commit 2ee91e54bd
1 changed files with 8 additions and 10 deletions
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18
drivers/net/ethernet/ti/cpsw.c
View file

@ -1323,6 +1323,10 @@ static int cpsw_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
struct cpts *cpts = priv->cpts;
struct hwtstamp_config cfg;
if (priv->version != CPSW_VERSION_1 &&
priv->version != CPSW_VERSION_2)
return -EOPNOTSUPP;
if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
return -EFAULT;
@ -1330,16 +1334,8 @@ static int cpsw_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
if (cfg.flags)
return -EINVAL;
switch (cfg.tx_type) {
case HWTSTAMP_TX_OFF:
cpts->tx_enable = 0;
break;
case HWTSTAMP_TX_ON:
cpts->tx_enable = 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:
@ -1366,6 +1362,8 @@ static int cpsw_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
return -ERANGE;
}
cpts->tx_enable = cfg.tx_type == HWTSTAMP_TX_ON;
switch (priv->version) {
case CPSW_VERSION_1:
cpsw_hwtstamp_v1(priv);
@ -1374,7 +1372,7 @@ static int cpsw_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
cpsw_hwtstamp_v2(priv);
break;
default:
return -ENOTSUPP;
WARN_ON(1);
}
return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;