On Sat, 23 May 2015, Michael Welling wrote:
> If a valid GPIO is specified but cannot be requested by the driver, print a
> message and error out of omap2_mcspi_setup.
>
> Signed-off-by: Michael Welling <mwelling@xxxxxxxx>
> ---
> drivers/spi/spi-omap2-mcspi.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
> index c4e21ad..5867384 100644
> --- a/drivers/spi/spi-omap2-mcspi.c
> +++ b/drivers/spi/spi-omap2-mcspi.c
> @@ -1023,9 +1023,12 @@ static int omap2_mcspi_setup(struct spi_device *spi)
> }
>
> if (gpio_is_valid(spi->cs_gpio)) {
> - if (gpio_request(spi->cs_gpio, dev_name(&spi->dev)) == 0)
> - gpio_direction_output(spi->cs_gpio,
> - !(spi->mode & SPI_CS_HIGH));
> + ret = gpio_request(spi->cs_gpio, dev_name(&spi->dev));
> + if (ret) {
> + dev_err(&spi->dev, "failed to request gpio\n");
> + return ret;
> + }
> + gpio_direction_output(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH));
> }
just wondering if the outer gpio_is_valid is actually needed as it seems
gpio_request() is actually calling gpio_is_valid() anyway and would return
non 0 if it were not,
thx!
hofrat
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