From 263c8c4c76d9da63f1f8805ac5fc62a270448301 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Wed, 15 Jan 2020 13:54:17 +0100 Subject: [PATCH] thermal: rcar_thermal: Use usleep_range() instead of udelay() MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit rcar_thermal_update_temp() takes a mutex, so it is always called in a context that can sleep. Hence replace the 300 µs busy loop by a call to usleep_range(), to allow other threads to run. Signed-off-by: Geert Uytterhoeven Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/20200115125417.5263-1-geert+renesas@glider.be --- drivers/thermal/rcar_thermal.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c index d0873de..a8dd96d 100644 --- a/drivers/thermal/rcar_thermal.c +++ b/drivers/thermal/rcar_thermal.c @@ -219,7 +219,7 @@ static int rcar_thermal_update_temp(struct rcar_thermal_priv *priv) * to get stable temperature. * see "Usage Notes" on datasheet */ - udelay(300); + usleep_range(300, 400); new = rcar_thermal_read(priv, THSSR) & CTEMP; if (new == old) { -- 2.7.4