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[ Upstream commit6ffd02b822] By using a regular non-overflow-checking add, the MediaTek icc-emi driver will happy wrap at U32_MAX + 1 to 0. As it's common for the interconnect core to fill in INT_MAX values, this is not a hypothetical situation, but something that actually happens in regular use. This would be pretty disasterous if anything used this driver. Replace the addition with an overflow-checked addition from overflow.h, and saturate to U32_MAX if an overflow is detected. Fixes:b45293799f("interconnect: mediatek: Add MediaTek MT8183/8195 EMI Interconnect driver") Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com> Link: https://lore.kernel.org/r/20251124-mt8196-dvfsrc-v2-13-d9c1334db9f3@collabora.com Signed-off-by: Georgi Djakov <djakov@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>