diff options
| author | Jean Delvare <khali@linux-fr.org> | 2013-03-07 02:35:53 +0400 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2013-03-27 11:55:13 +0400 |
| commit | 7fafae669a623b003d9d40b75ab31bb9625d5c38 (patch) | |
| tree | bf64062c90be60a81d06934d31dd15367286ca24 | |
| parent | 1b295c839b3931244f37cb52265017b298518f69 (diff) | |
| download | linux-7fafae669a623b003d9d40b75ab31bb9625d5c38.tar.xz | |
i2c: mux: gpio: Check gpio_direction_output return value
gpio_direction_output() may fail, check for that and deal with it
appropriately. Also log an error message if gpio_request() fails.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Peter Korsgaard <peter.korsgaard@barco.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
| -rw-r--r-- | drivers/i2c/muxes/i2c-mux-gpio.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/i2c/muxes/i2c-mux-gpio.c b/drivers/i2c/muxes/i2c-mux-gpio.c index abc2e55aa243..5a0ce0081dce 100644 --- a/drivers/i2c/muxes/i2c-mux-gpio.c +++ b/drivers/i2c/muxes/i2c-mux-gpio.c @@ -201,10 +201,21 @@ static int i2c_mux_gpio_probe(struct platform_device *pdev) for (i = 0; i < mux->data.n_gpios; i++) { ret = gpio_request(gpio_base + mux->data.gpios[i], "i2c-mux-gpio"); - if (ret) + if (ret) { + dev_err(&pdev->dev, "Failed to request GPIO %d\n", + mux->data.gpios[i]); goto err_request_gpio; - gpio_direction_output(gpio_base + mux->data.gpios[i], - initial_state & (1 << i)); + } + + ret = gpio_direction_output(gpio_base + mux->data.gpios[i], + initial_state & (1 << i)); + if (ret) { + dev_err(&pdev->dev, + "Failed to set direction of GPIO %d to output\n", + mux->data.gpios[i]); + i++; /* gpio_request above succeeded, so must free */ + goto err_request_gpio; + } } for (i = 0; i < mux->data.n_values; i++) { |