From: Changcheng Deng deng.changcheng@zte.com.cn
stable inclusion from stable-v5.10.94 commit 81d2e96ababb7147206f6960e9aac66e6afb87f1 bugzilla: https://gitee.com/openeuler/kernel/issues/I531X9
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
--------------------------------
[ Upstream commit 92c550f9ffd2884bb5def52b5c0485a35e452784 ]
do_div() does a 64-by-32 division. Here the divisor is an unsigned long which on some platforms is 64 bit wide. So use div64_ul instead of do_div to avoid a possible truncation.
Reported-by: Zeal Robot zealci@zte.com.cn Signed-off-by: Changcheng Deng deng.changcheng@zte.com.cn Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org Link: https://lore.kernel.org/r/20211125014311.45942-1-deng.changcheng@zte.com.cn Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Acked-by: Xie XiuQi xiexiuqi@huawei.com --- drivers/soc/qcom/cpr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/soc/qcom/cpr.c b/drivers/soc/qcom/cpr.c index b24cc77d1889..6298561bc29c 100644 --- a/drivers/soc/qcom/cpr.c +++ b/drivers/soc/qcom/cpr.c @@ -1043,7 +1043,7 @@ static int cpr_interpolate(const struct corner *corner, int step_volt, return corner->uV;
temp = f_diff * (uV_high - uV_low); - do_div(temp, f_high - f_low); + temp = div64_ul(temp, f_high - f_low);
/* * max_volt_scale has units of uV/MHz while freq values