From: Linus Walleij <linus.walleij@linaro.org>
Date: Fri, 5 Jun 2015 09:36:10 +0000 (+0200)
Subject: gpio: improve error reporting on own descriptors
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a713890d32900459031d344748a23ca37758bec5;p=linux-beck.git

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>
---

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 07b83a9e9821..7f87b9baa905 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -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;
 	}