linux-kernel - [PATCH 4.14 164/173] ASoC: samsung: Fix invalid argument when devm_gpiod

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Date:   Mon, 24 Sep 2018 13:53:18 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jaechul Lee <jcsing.lee@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH 4.14 164/173] ASoC: samsung: Fix invalid argument when devm_gpiod_get is called

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jaechul Lee <jcsing.lee@...sung.com>

commit 975b6a93088e83a41ba2f0dec2f086678fdb2a7a upstream.

devm_gpiod_get is called with GPIOF_OUT_INIT_LOW but the function doesn't
allow the parameters. Unluckily, GPIOF_OUT_INIT_LOW is same value as
GPIOD_ASIS and gpio direction isn't set properly.

Muted stream comes up when I try recording some sounds on TM2. mic-bias
gpiod state can't be changed because the gpiod is created with the invalid
parameter. The gpio should be set GPIOD_OUT_HIGH.

Fixes: 1bfbc260a5b4 ("ASoC: samsung: Add machine driver for Exynos5433 based TM2 board")
Signed-off-by: Jaechul Lee <jcsing.lee@...sung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/soc/samsung/tm2_wm5110.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/sound/soc/samsung/tm2_wm5110.c
+++ b/sound/soc/samsung/tm2_wm5110.c
@@ -436,8 +436,7 @@ static int tm2_probe(struct platform_dev
 	snd_soc_card_set_drvdata(card, priv);
 	card->dev = dev;
 
-	priv->gpio_mic_bias = devm_gpiod_get(dev, "mic-bias",
-						GPIOF_OUT_INIT_LOW);
+	priv->gpio_mic_bias = devm_gpiod_get(dev, "mic-bias", GPIOD_OUT_HIGH);
 	if (IS_ERR(priv->gpio_mic_bias)) {
 		dev_err(dev, "Failed to get mic bias gpio\n");
 		return PTR_ERR(priv->gpio_mic_bias);