From 4b7d293c64fde133cc2b669d0d7637b8a4c6d62f Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Sun, 3 Mar 2013 20:21:30 -0800 Subject: [PATCH] Input: mms114 - Fix regulator enable and disable paths When it uses regulators the mms114 driver checks to see if it managed to acquire regulators and ignores errors. This is not the intended usage and not great style in general. Since the driver already refuses to probe if it fails to allocate the regulators simply make the enable and disable calls unconditional and add appropriate error handling, including adding cleanup of the regulators if setup_reg() fails. Signed-off-by: Mark Brown Acked-by: Joonyoung Shim Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/mms114.c | 34 ++++++++++++++++++++++-------- 1 file changed, 25 insertions(+), 9 deletions(-) diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c index 4a29ddf6bf1e..1443532fe6c4 100644 --- a/drivers/input/touchscreen/mms114.c +++ b/drivers/input/touchscreen/mms114.c @@ -314,15 +314,27 @@ static int mms114_start(struct mms114_data *data) struct i2c_client *client = data->client; int error; - if (data->core_reg) - regulator_enable(data->core_reg); - if (data->io_reg) - regulator_enable(data->io_reg); + error = regulator_enable(data->core_reg); + if (error) { + dev_err(&client->dev, "Failed to enable avdd: %d\n", error); + return error; + } + + error = regulator_enable(data->io_reg); + if (error) { + dev_err(&client->dev, "Failed to enable vdd: %d\n", error); + regulator_disable(data->core_reg); + return error; + } + mdelay(MMS114_POWERON_DELAY); error = mms114_setup_regs(data); - if (error < 0) + if (error < 0) { + regulator_disable(data->io_reg); + regulator_disable(data->core_reg); return error; + } if (data->pdata->cfg_pin) data->pdata->cfg_pin(true); @@ -335,16 +347,20 @@ static int mms114_start(struct mms114_data *data) static void mms114_stop(struct mms114_data *data) { struct i2c_client *client = data->client; + int error; disable_irq(client->irq); if (data->pdata->cfg_pin) data->pdata->cfg_pin(false); - if (data->io_reg) - regulator_disable(data->io_reg); - if (data->core_reg) - regulator_disable(data->core_reg); + error = regulator_disable(data->io_reg); + if (error) + dev_warn(&client->dev, "Failed to disable vdd: %d\n", error); + + error = regulator_disable(data->core_reg); + if (error) + dev_warn(&client->dev, "Failed to disable avdd: %d\n", error); } static int mms114_input_open(struct input_dev *dev)