Commit 00c26ad5 authored by Yangbo Lu's avatar Yangbo Lu Committed by Zheng Zengkai
Browse files

ptp_qoriq: fix overflow in ptp_qoriq_adjfine() u64 calcalation



stable inclusion
from stable-5.10.29
commit 266d3106efbd9ffe92e0b86789299feae0750991
bugzilla: 51789

--------------------------------

[ Upstream commit f51d7bf1 ]

Current calculation for diff of TMR_ADD register value may have
64-bit overflow in this code line, when long type scaled_ppm is
large.

adj *= scaled_ppm;

This patch is to resolve it by using mul_u64_u64_div_u64().

Signed-off-by: default avatarYangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarChen Jun <chenjun102@huawei.com>
Acked-by: default avatar  Weilong Chen <chenweilong@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent 2b2079de
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