linux-kernel - [PATCH v1 2/2] gpiolib: print an error name instead of a plain number in error string

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Message-Id: <20190824233724.1775-2-uwe@kleine-koenig.org>
Date:   Sun, 25 Aug 2019 01:37:24 +0200
From:   Uwe Kleine-König <uwe@...ine-koenig.org>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Cc:     Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org
Subject: [PATCH v1 2/2] gpiolib: print an error name instead of a plain number in error string

This is an example that makes use of the just introduced printk format
%dE that prints (e.g.) "EIO" when the matching integer is -EIO (or EIO).

Signed-off-by: Uwe Kleine-König <uwe@...ine-koenig.org>
---
 drivers/gpio/gpiolib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index f497003f119c..b50ea24f087f 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1247,7 +1247,7 @@ static void gpiochip_setup_devs(void)
 	list_for_each_entry(gdev, &gpio_devices, list) {
 		err = gpiochip_setup_dev(gdev);
 		if (err)
-			pr_err("%s: Failed to initialize gpio device (%d)\n",
+			pr_err("%s: Failed to initialize gpio device (%dE)\n",
 			       dev_name(&gdev->dev), err);
 	}
 }
-- 
2.20.1