linux-kernel - [PATCH] ASoC: rt5659: use msleep() for long delays

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Date:   Thu, 12 Jan 2017 14:14:20 +0100
From:   Nicholas Mc Guire <hofrat@...dl.org>
To:     Bard Liao <bardliao@...ltek.com>
Cc:     Oder Chiou <oder_chiou@...ltek.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, Nicholas Mc Guire <hofrat@...dl.org>
Subject: [PATCH] ASoC: rt5659: use msleep() for long delays

ulseep_range() uses hrtimers and provides no advantage over msleep()
for larger delays. For this large delay msleep() is preferable.

Fixes: commit d3cb2de2479b ("ASoC: rt5659: add rt5659 codec driver")
Link: http://lkml.org/lkml/2017/1/11/377
Signed-off-by: Nicholas Mc Guire <hofrat@...dl.org>
---

Problem was found by cocinelle script.

Patch was compile tested with: x86_64_defconfig + CONFIG_COMPILE_TEST=y
SND_SOC=m + SND_SOC_ALL_CODECS=m (implies SND_SOC_RT5659=m)
(44 sparse warnings - fixed in a seperate patches)

Patch is aginast 4.10-rc3 (localversion-next is next-20170112)

 sound/soc/codecs/rt5659.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/rt5659.c b/sound/soc/codecs/rt5659.c
index db54550..a57f67b 100644
--- a/sound/soc/codecs/rt5659.c
+++ b/sound/soc/codecs/rt5659.c
@@ -4018,7 +4018,7 @@ static int rt5659_i2c_probe(struct i2c_client *i2c,
 							GPIOD_OUT_HIGH);
 
 	/* Sleep for 300 ms miniumum */
-	usleep_range(300000, 350000);
+	msleep(300);
 
 	rt5659->regmap = devm_regmap_init_i2c(i2c, &rt5659_regmap);
 	if (IS_ERR(rt5659->regmap)) {
-- 
2.1.4