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net: stmmac: avoid using timespec

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We want to deprecate the use of 'struct timespec' on 32-bit
architectures, as it is will overflow in 2038. The stmmac
driver uses it to read the current time, and can simply
be changed to use ktime_get_real_ts64() instead.

Because of hardware limitations, there is still an overflow
in year 2106, which we cannot really avoid, but this documents
the overflow.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2015-09-30 13:26:32 +02:00 committed by David S. Miller
parent be7ccdc36b
commit 0a6241551d
1 changed files with 5 additions and 3 deletions
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8
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -424,7 +424,7 @@ static int stmmac_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
{
struct stmmac_priv *priv = netdev_priv(dev);
struct hwtstamp_config config;
struct timespec now;
struct timespec64 now;
u64 temp = 0;
u32 ptp_v2 = 0;
u32 tstamp_all = 0;
@ -621,8 +621,10 @@ static int stmmac_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
priv->default_addend);
/* initialize system time */
getnstimeofday(&now);
priv->hw->ptp->init_systime(priv->ioaddr, now.tv_sec,
ktime_get_real_ts64(&now);
/* lower 32 bits of tv_sec are safe until y2106 */
priv->hw->ptp->init_systime(priv->ioaddr, (u32)now.tv_sec,
now.tv_nsec);
}