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gpio: improve error reporting on own descriptors 

When requesting own descriptors through hogs, it is useful to
get some details about what's going on if we encounter problems.

Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2015-06-05 11:36:10 +02:00
parent 8405f20894
commit a713890d32
1 changed files with 4 additions and 2 deletions
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6
drivers/gpio/gpiolib.c
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@ -2131,13 +2131,15 @@ 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 own GPIO %s failed\n", name);
pr_err("requesting hog GPIO %s (chip %s, offset %d) failed\n",
name, chip->label, hwnum);
return PTR_ERR(local_desc);
}
status = gpiod_configure_flags(desc, name, lflags, dflags);
if (status < 0) {
pr_err("setup of GPIO %s failed\n", name);
pr_err("setup of hog GPIO %s (chip %s, offset %d) failed\n",
name, chip->label, hwnum);
gpiochip_free_own_desc(desc);
return status;
}