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>

diff --git a/sound/soc/codecs/rt5514-spi.c b/sound/soc/codecs/rt5514-spi.c
index 2df91db765acd6300406aa330cb0d85b3edb7d96..ca6a90d8fc394402b8d65b69a4933bdd40d46ab0 100644 (file)
--- a/sound/soc/codecs/rt5514-spi.c
+++ b/sound/soc/codecs/rt5514-spi.c
@@ -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;