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ALSA: atmel/ac97c: correct the unexpected behavior when using uninitial value for reset pin

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When pdata->reset_pin is passed with a negative value (means gpio
is invalid), then chip->reset_pin will not be assigned to a vaule,
it will use default value 0. This will cause unexpected behavior.

So, add this patch to correct.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Bo Shen 2012-05-11 17:39:28 +08:00 committed by Takashi Iwai
parent 2abb80176c
commit b2522f9262
1 changed files with 2 additions and 0 deletions
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2
sound/atmel/ac97c.c
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@ -991,6 +991,8 @@ static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
gpio_direction_output(pdata->reset_pin, 1);
chip->reset_pin = pdata->reset_pin;
}
} else {
chip->reset_pin = -EINVAL;
}
snd_card_set_dev(card, &pdev->dev);