From: xueqin Luo Date: Mon, 2 Dec 2024 03:19:16 +0000 (+0800) Subject: wifi: mt76: mt7996: fix overflows seen when writing limit attributes X-Git-Tag: block-6.14-20240131~28^2~20^2~4^2~79 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=5adbc8ce5bbe7e311e2600b7d7d998a958873e98;p=linux-block.git wifi: mt76: mt7996: fix overflows seen when writing limit attributes DIV_ROUND_CLOSEST() after kstrtoul() results in an overflow if a large number such as 18446744073709551615 is provided by the user. Fix it by reordering clamp_val() and DIV_ROUND_CLOSEST() operations. This commit was inspired by commit: 57ee12b6c514. Fixes: 6879b2e94172 ("wifi: mt76: mt7996: add thermal sensor device support") Signed-off-by: xueqin Luo Link: https://patch.msgid.link/20241202031917.23741-2-luoxueqin@kylinos.cn Signed-off-by: Felix Fietkau --- diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/init.c b/drivers/net/wireless/mediatek/mt76/mt7996/init.c index 2d36c7325137..8cfb122b48ac 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/init.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/init.c @@ -82,7 +82,7 @@ static ssize_t mt7996_thermal_temp_store(struct device *dev, return ret; mutex_lock(&phy->dev->mt76.mutex); - val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 40, 130); + val = DIV_ROUND_CLOSEST(clamp_val(val, 40 * 1000, 130 * 1000), 1000); /* add a safety margin ~10 */ if ((i - 1 == MT7996_CRIT_TEMP_IDX &&