gpio: just plain warning when nonexisting gpio requested

When trying to export an nonexisting gpio ID, the kernel prints out a
big warning w/ stacktrace, sounding like a huge problem. In fact it's
a pretty normal situation, like file or device not found.

So, just print a more relaxed warning instead.

changes v2: drop defining pr_fmt()

Signed-off-by: Enrico Weigelt <info@metux.net>
Link: https://lore.kernel.org/r/20201202133754.32045-1-info@metux.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index c6db72d5420e8579623d043e85e258ae9464b7df..fd622c05cbd551bbe07f40e422fc66a25e021bf3 100644 (file)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
+
 #include <linux/bitmap.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -119,7 +120,7 @@ struct gpio_desc *gpio_to_desc(unsigned gpio)
        spin_unlock_irqrestore(&gpio_lock, flags);
 
        if (!gpio_is_valid(gpio))
-               WARN(1, "invalid GPIO %d\n", gpio);
+               pr_warn("invalid GPIO %d\n", gpio);
 
        return NULL;
 }