>>>>> "JD" == Jean Delvare <khali@xxxxxxxxxxxx> writes:
JD> gpio_direction_output() may fail, check for that and deal with it
JD> appropriately. Also log an error message if gpio_request() fails.
JD> Signed-off-by: Jean Delvare <khali@xxxxxxxxxxxx>
JD> Cc: Peter Korsgaard <peter.korsgaard@xxxxxxxxx>
JD> Cc: Wolfram Sang <wsa@xxxxxxxxxxxxx>
JD> ---
JD> drivers/i2c/muxes/i2c-mux-gpio.c | 17 ++++++++++++++---
JD> 1 file changed, 14 insertions(+), 3 deletions(-)
JD> --- linux-3.7.orig/drivers/i2c/muxes/i2c-mux-gpio.c 2012-12-15 14:52:47.368991730 +0100
JD> +++ linux-3.7/drivers/i2c/muxes/i2c-mux-gpio.c 2013-03-03 14:27:21.003905620 +0100
JD> @@ -123,10 +123,21 @@ static int __devinit i2c_mux_gpio_probe(
JD> for (i = 0; i < pdata->n_gpios; i++) {
JD> ret = gpio_request(gpio_base + pdata->gpios[i], "i2c-mux-gpio");
JD> - if (ret)
JD> + if (ret) {
JD> + dev_err(&pdev->dev, "Failed to request GPIO %d\n",
JD> + pdata->gpios[i]);
JD> goto err_request_gpio;
JD> - gpio_direction_output(gpio_base + pdata->gpios[i],
JD> - initial_state & (1 << i));
JD> + }
JD> +
JD> + ret = gpio_direction_output(gpio_base + pdata->gpios[i],
JD> + initial_state & (1 << i));
JD> + if (ret) {
JD> + dev_err(&pdev->dev,
JD> + "Failed to set direction of GPIO %d to output\n",
JD> + pdata->gpios[i]);
JD> + i++;
JD> + goto err_request_gpio;
The i++ is a bit nonobvious, so a comment would be good. Other than that
it looks fine.
Acked-by: Peter Korsgaard <peter.korsgaard@xxxxxxxxx>
--
Sorry about disclaimer - It's out of my control.
Bye, Peter Korsgaard
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