Commit eccffcf4 authored by Xiaoliang Yang's avatar Xiaoliang Yang Committed by Jakub Kicinski
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net: stmmac: ptp: fix potentially overflowing expression 



Convert the u32 variable to type u64 in a context where expression of
type u64 is required to avoid potential overflow.

Fixes: e9e37200 ("net: stmmac: ptp: update tas basetime after ptp adjust")
Signed-off-by: default avatarXiaoliang Yang <xiaoliang.yang_1@nxp.com>
Link: https://lore.kernel.org/r/20211223073928.37371-1-xiaoliang.yang_1@nxp.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent ae2778a6

drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c

+1 −1
Original line number Diff line number Diff line
@@ -102,7 +102,7 @@ static int stmmac_adjust_time(struct ptp_clock_info *ptp, s64 delta) 
		time.tv_nsec = priv->plat->est->btr_reserve[0];

		time.tv_sec = priv->plat->est->btr_reserve[1];

		basetime = timespec64_to_ktime(time);

		cycle_time = priv->plat->est->ctr[1] * NSEC_PER_SEC +

		cycle_time = (u64)priv->plat->est->ctr[1] * NSEC_PER_SEC +

			     priv->plat->est->ctr[0];

		time = stmmac_calc_tas_basetime(basetime,

						current_time_ns,