From: Franklin S Cooper Jr <fcooper@xxxxxx> Since reset and wake pin are optional the gpio structure for those pins may be null. Therefore, they can't be blindly passed to desc_to_gpio. Only use desc_to_gpio for valid gpios. This issue was detected by Smatch http://permalink.gmane.org/gmane.linux.kernel.input/45927 Signed-off-by: Franklin S Cooper Jr <fcooper@xxxxxx> --- This patch is based on top of the following patchset which already is already in linux-next: https://patchwork.kernel.org/patch/7166931/ drivers/input/touchscreen/edt-ft5x06.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c index 7239c31..f877404 100644 --- a/drivers/input/touchscreen/edt-ft5x06.c +++ b/drivers/input/touchscreen/edt-ft5x06.c @@ -876,11 +876,13 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, struct edt_ft5x06_ts_data *tsdata; struct input_dev *input; unsigned long irq_flags; - int error; + int error, reset_pin, wake_pin; char fw_version[EDT_NAME_LEN]; dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n"); + reset_pin = wake_pin = -1; + tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL); if (!tsdata) { dev_err(&client->dev, "failed to allocate driver data.\n"); @@ -908,12 +910,14 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, if (tsdata->wake_gpio) { usleep_range(5000, 6000); gpiod_set_value_cansleep(tsdata->wake_gpio, 1); + wake_pin = desc_to_gpio(tsdata->wake_gpio); } if (tsdata->reset_gpio) { usleep_range(5000, 6000); gpiod_set_value_cansleep(tsdata->reset_gpio, 0); msleep(300); + reset_pin = desc_to_gpio(tsdata->reset_gpio); } input = devm_input_allocate_device(&client->dev); @@ -987,8 +991,7 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, dev_dbg(&client->dev, "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n", - client->irq, desc_to_gpio(tsdata->wake_gpio), - desc_to_gpio(tsdata->reset_gpio)); + client->irq, wake_pin, reset_pin); return 0; -- 2.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
