On 08.03.2016 14:02, Laxman Dewangan wrote:
> Print the error number of GPIO hog failed during
> its configurations. This helps in identifying the
> failure without instrumenting the code.
>
> Signed-off-by: Laxman Dewangan <ldewangan@xxxxxxxxxx>
> ---
> drivers/gpio/gpiolib.c | 9 +++++----
> 1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index bc788b9..7575ebb 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -2621,15 +2621,16 @@ int gpiod_hog(struct gpio_desc *desc, const char *name,
>
> local_desc = gpiochip_request_own_desc(chip, hwnum, name);
> if (IS_ERR(local_desc)) {
> - pr_err("requesting hog GPIO %s (chip %s, offset %d) failed\n",
> - name, chip->label, hwnum);
> + status = PTR_ERR(local_desc);
> + pr_err("requesting hog GPIO %s, chip %s, offset %d failed %d\n",
> + name, chip->label, hwnum, status);
> return PTR_ERR(local_desc);
You can do "return status;" now.
> }
>
> status = gpiod_configure_flags(desc, name, dflags);
> if (status < 0) {
> - pr_err("setup of hog GPIO %s (chip %s, offset %d) failed\n",
> - name, chip->label, hwnum);
> + pr_err("setup of hog GPIO %s chip %s, offset %d failed %d\n",
> + name, chip->label, hwnum, status);
> gpiochip_free_own_desc(desc);
> return status;
> }
>
--
With best wishes,
Vladimir
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