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ASoC: rt5645: Fix potential crash in jd function

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If no one defined the rt5645->pdata.hp_det_gpio in coreboot/bios.
It will cause kernel to reboot because rt5645->pdata.hp_det_gpio
is 0. So it is worth to add a check in rt5645_jack_detect.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Fang, Yang A <yang.a.fang@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Bard Liao 2014-12-09 10:14:45 +08:00 committed by Mark Brown
parent df078d291d
commit 75945896a2
1 changed files with 4 additions and 0 deletions
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4
sound/soc/codecs/rt5645.c
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@ -2113,6 +2113,10 @@ static int rt5645_jack_detect(struct snd_soc_codec *codec,
int gpio_state, jack_type = 0;
unsigned int val;
if (!gpio_is_valid(rt5645->pdata.hp_det_gpio)) {
dev_err(codec->dev, "invalid gpio\n");
return -EINVAL;
}
gpio_state = gpio_get_value(rt5645->pdata.hp_det_gpio);
dev_dbg(codec->dev, "gpio = %d(%d)\n", rt5645->pdata.hp_det_gpio,