From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Date: Mon, 21 Oct 2024 18:57:17 +0000 (+0200)
Subject: gpio: sysfs: demote warning messages on invalid user input to debug
X-Git-Tag: v6.13-rc1~156^2~32
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=37d5a6d6f406322ed0850fc2af1d377aced16340;p=linux-block.git

gpio: sysfs: demote warning messages on invalid user input to debug

We should not emit a non-ratelimited warning everytime a user passes an
invalid value to /sys/class/gpio/export as it's an easy way to spam the
kernel log. Change the relevant messages to pr_debug_ratelimited().

Link: https://lore.kernel.org/r/20241021185717.96449-1-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---

diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c
index 0c713baa7784..203fc3394afe 100644
--- a/drivers/gpio/gpiolib-sysfs.c
+++ b/drivers/gpio/gpiolib-sysfs.c
@@ -463,7 +463,7 @@ static ssize_t export_store(const struct class *class,
 	desc = gpio_to_desc(gpio);
 	/* reject invalid GPIOs */
 	if (!desc) {
-		pr_warn("%s: invalid GPIO %ld\n", __func__, gpio);
+		pr_debug_ratelimited("%s: invalid GPIO %ld\n", __func__, gpio);
 		return -EINVAL;
 	}
 
@@ -473,7 +473,7 @@ static ssize_t export_store(const struct class *class,
 
 	offset = gpio_chip_hwgpio(desc);
 	if (!gpiochip_line_is_valid(guard.gc, offset)) {
-		pr_warn("%s: GPIO %ld masked\n", __func__, gpio);
+		pr_debug_ratelimited("%s: GPIO %ld masked\n", __func__, gpio);
 		return -EINVAL;
 	}
 
@@ -520,7 +520,7 @@ static ssize_t unexport_store(const struct class *class,
 	desc = gpio_to_desc(gpio);
 	/* reject bogus commands (gpiod_unexport() ignores them) */
 	if (!desc) {
-		pr_warn("%s: invalid GPIO %ld\n", __func__, gpio);
+		pr_debug_ratelimited("%s: invalid GPIO %ld\n", __func__, gpio);
 		return -EINVAL;
 	}