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ASoC: rt5514: Add the sanity check for the driver_data in the resume function 

If the rt5514 spi driver is loaded, but the snd_soc_platform_driver is not
loaded by the correct DAI settings, the NULL pointer will be gotten by
snd_soc_platform_get_drvdata in the resume function.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
oder_chiou@realtek.com 2017-11-20 18:23:19 +08:00 committed by Mark Brown
parent 254beff97b
commit 346cccf883
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GPG Key ID: 24D68B725D5487D0
1 changed files with 7 additions and 4 deletions
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11
sound/soc/codecs/rt5514-spi.c
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@ -482,10 +482,13 @@ static int __maybe_unused rt5514_resume(struct device *dev)
if (device_may_wakeup(dev))
disable_irq_wake(irq);
if (rt5514_dsp->substream) {
rt5514_spi_burst_read(RT5514_IRQ_CTRL, (u8 *)&buf, sizeof(buf));
if (buf[0] & RT5514_IRQ_STATUS_BIT)
rt5514_schedule_copy(rt5514_dsp);
if (rt5514_dsp) {
if (rt5514_dsp->substream) {
rt5514_spi_burst_read(RT5514_IRQ_CTRL, (u8 *)&buf,
sizeof(buf));
if (buf[0] & RT5514_IRQ_STATUS_BIT)
rt5514_schedule_copy(rt5514_dsp);
}
}
return 0;