gpio: gpiolib: Print error number if gpio hog failed

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@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 1edc830..59a0d8e 100644 (file)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -2702,15 +2702,16 @@ 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);
-               return PTR_ERR(local_desc);
+               status = PTR_ERR(local_desc);
+               pr_err("requesting hog GPIO %s (chip %s, offset %d) failed, %d\n",
+                      name, chip->label, hwnum, status);
+               return status;
        }
 
        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;
        }