Input: wm97xx-core - fix race on PHY init

The chip phy_init() function must be called before the dig_enable() function
but dig_enable() is called when the device is opened and we only call
phy_init() after having reigstered the device, meaning the two can race.
Fix this by doing the phy_init() before we register the input device.

Thanks to Rodolfo Giometti <[e-mail]> for the report.

Signed-off-by: Mark Brown <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/touchscreen/wm97xx-core.c

···
 		goto alloc_err;
 	}
 
+	/* set up physical characteristics */
+	wm->codec->phy_init(wm);
+
+	/* load gpio cache */
+	wm->gpio[0] = wm97xx_reg_read(wm, AC97_GPIO_CFG);
+	wm->gpio[1] = wm97xx_reg_read(wm, AC97_GPIO_POLARITY);
+	wm->gpio[2] = wm97xx_reg_read(wm, AC97_GPIO_STICKY);
+	wm->gpio[3] = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP);
+	wm->gpio[4] = wm97xx_reg_read(wm, AC97_GPIO_STATUS);
+	wm->gpio[5] = wm97xx_reg_read(wm, AC97_MISC_AFE);
+
 	wm->input_dev = input_allocate_device();
 	if (wm->input_dev == NULL) {
 		ret = -ENOMEM;
···
 	ret = input_register_device(wm->input_dev);
 	if (ret < 0)
 		goto dev_alloc_err;
-
-	/* set up physical characteristics */
-	wm->codec->phy_init(wm);
-
-	/* load gpio cache */
-	wm->gpio[0] = wm97xx_reg_read(wm, AC97_GPIO_CFG);
-	wm->gpio[1] = wm97xx_reg_read(wm, AC97_GPIO_POLARITY);
-	wm->gpio[2] = wm97xx_reg_read(wm, AC97_GPIO_STICKY);
-	wm->gpio[3] = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP);
-	wm->gpio[4] = wm97xx_reg_read(wm, AC97_GPIO_STATUS);
-	wm->gpio[5] = wm97xx_reg_read(wm, AC97_MISC_AFE);
 
 	/* register our battery device */
 	wm->battery_dev = platform_device_alloc("wm97xx-battery", -1);