From: Wan Jiabing <wanjiabing@vivo.com>
Date: Tue, 26 Apr 2022 13:21:26 +0000 (+0800)
Subject: drm/msm: Use div64_ul instead of do_div
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4400c3a1d48f7f7863ca65d24f99ad295b37726c;p=linux.git

drm/msm: Use div64_ul instead of do_div

Fix following coccicheck warning:
drivers/gpu/drm/msm/msm_gpu_devfreq.c:72:1-7: WARNING: do_div() does a 64-by-32 division, please consider using div64_ul instead.

Use div64_ul instead of do_div to avoid a possible truncation.

Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Patchwork: https://patchwork.freedesktop.org/patch/483499/
Link: https://lore.kernel.org/r/20220426132126.686447-1-wanjiabing@vivo.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---

diff --git a/drivers/gpu/drm/msm/msm_gpu_devfreq.c b/drivers/gpu/drm/msm/msm_gpu_devfreq.c
index d2539ca78c296..c2ea978c89218 100644
--- a/drivers/gpu/drm/msm/msm_gpu_devfreq.c
+++ b/drivers/gpu/drm/msm/msm_gpu_devfreq.c
@@ -69,7 +69,7 @@ static void get_raw_dev_status(struct msm_gpu *gpu,
 	df->time = time;
 
 	busy_time *= USEC_PER_SEC;
-	do_div(busy_time, sample_rate);
+	busy_time = div64_ul(busy_time, sample_rate);
 	if (WARN_ON(busy_time > ~0LU))
 		busy_time = ~0LU;