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e1000e: Validate hwtstamp_config completely before applying it

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e1000e_hwtstamp_ioctl() should validate all fields of hwtstamp_config
before making any changes.  Currently it copies the configuration to
the e1000_adapter structure before validating it at all.

Change e1000e_config_hwtstamp() to take a pointer to the
hwstamp_config and to copy the config after validating it.

Compile-tested only.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings 2013-11-14 00:41:38 +00:00 committed by David S. Miller
parent 58b187c68d
commit 62d7e3a2d0
1 changed files with 6 additions and 8 deletions
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14
drivers/net/ethernet/intel/e1000e/netdev.c
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@ -3482,10 +3482,10 @@ s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca)
* specified. Matching the kind of event packet is not supported, with the
* exception of "all V2 events regardless of level 2 or 4".
**/
static int e1000e_config_hwtstamp(struct e1000_adapter *adapter)
static int e1000e_config_hwtstamp(struct e1000_adapter *adapter,
struct hwtstamp_config *config)
{
struct e1000_hw *hw = &adapter->hw;
struct hwtstamp_config *config = &adapter->hwtstamp_config;
u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED;
u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
u32 rxmtrl = 0;
@ -3586,6 +3586,8 @@ static int e1000e_config_hwtstamp(struct e1000_adapter *adapter)
return -ERANGE;
}
adapter->hwtstamp_config = *config;
/* enable/disable Tx h/w time stamping */
regval = er32(TSYNCTXCTL);
regval &= ~E1000_TSYNCTXCTL_ENABLED;
@ -3874,7 +3876,7 @@ void e1000e_reset(struct e1000_adapter *adapter)
e1000e_reset_adaptive(hw);
/* initialize systim and reset the ns time counter */
e1000e_config_hwtstamp(adapter);
e1000e_config_hwtstamp(adapter, &adapter->hwtstamp_config);
/* Set EEE advertisement as appropriate */
if (adapter->flags2 & FLAG2_HAS_EEE) {
@ -5797,14 +5799,10 @@ static int e1000e_hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
return -EFAULT;
adapter->hwtstamp_config = config;
ret_val = e1000e_config_hwtstamp(adapter);
ret_val = e1000e_config_hwtstamp(adapter, &config);
if (ret_val)
return ret_val;
config = adapter->hwtstamp_config;
switch (config.rx_filter) {
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: