From: Mark Brown Date: Tue, 27 May 2008 05:37:19 +0000 (-0400) Subject: Input: wm97xx-core - fix race on PHY init X-Git-Tag: v2.6.26-rc5~32^2~6 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5de4cd431db749bdca58ec88862462729f6159b2;p=linux-2.6 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 for the report. Signed-off-by: Mark Brown Signed-off-by: Dmitry Torokhov --- diff --git a/drivers/input/touchscreen/wm97xx-core.c b/drivers/input/touchscreen/wm97xx-core.c index 8a00918cfa..cdc24ad314 100644 --- a/drivers/input/touchscreen/wm97xx-core.c +++ b/drivers/input/touchscreen/wm97xx-core.c @@ -608,6 +608,17 @@ static int wm97xx_probe(struct device *dev) 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; @@ -635,17 +646,6 @@ static int wm97xx_probe(struct device *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); if (!wm->battery_dev) {