ASoC: wm8962: Fix null pointer pdata access in I2C probe()

When using DT binding to pass private data, there would be Kernel panic
occuring due to NULL pointer access in wm8962_i2c_probe(). Thus fix it.

Signed-off-by: Nicolin Chen <b42378@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index 2bf9ee7..7dd79c4 100644 (file)
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -3616,28 +3616,28 @@ static int wm8962_i2c_probe(struct i2c_client *i2c,
                           0);
 
        /* Apply static configuration for GPIOs */
-       for (i = 0; i < ARRAY_SIZE(pdata->gpio_init); i++)
-               if (pdata->gpio_init[i]) {
+       for (i = 0; i < ARRAY_SIZE(wm8962->pdata.gpio_init); i++)
+               if (wm8962->pdata.gpio_init[i]) {
                        wm8962_set_gpio_mode(wm8962, i + 1);
                        regmap_write(wm8962->regmap, 0x200 + i,
-                                    pdata->gpio_init[i] & 0xffff);
+                                    wm8962->pdata.gpio_init[i] & 0xffff);
                }
 
 
        /* Put the speakers into mono mode? */
-       if (pdata->spk_mono)
+       if (wm8962->pdata.spk_mono)
                regmap_update_bits(wm8962->regmap, WM8962_CLASS_D_CONTROL_2,
                                   WM8962_SPK_MONO_MASK, WM8962_SPK_MONO);
 
        /* Micbias setup, detection enable and detection
         * threasholds. */
-       if (pdata->mic_cfg)
+       if (wm8962->pdata.mic_cfg)
                regmap_update_bits(wm8962->regmap, WM8962_ADDITIONAL_CONTROL_4,
                                   WM8962_MICDET_ENA |
                                   WM8962_MICDET_THR_MASK |
                                   WM8962_MICSHORT_THR_MASK |
                                   WM8962_MICBIAS_LVL,
-                                  pdata->mic_cfg);
+                                  wm8962->pdata.mic_cfg);
 
        /* Latch volume update bits */
        regmap_update_bits(wm8962->regmap, WM8962_LEFT_INPUT_VOLUME,
@@ -3682,7 +3682,7 @@ static int wm8962_i2c_probe(struct i2c_client *i2c,
        }
 
        if (wm8962->irq) {
-               if (pdata->irq_active_low) {
+               if (wm8962->pdata.irq_active_low) {
                        trigger = IRQF_TRIGGER_LOW;
                        irq_pol = WM8962_IRQ_POL;
                } else {