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authorMathias Kresin <dev@kresin.me>2018-06-28 18:23:37 +0200
committerMathias Kresin <dev@kresin.me>2018-06-28 18:39:57 +0200
commita570933999da5ff4e6a37aecb0ad9a0ac2bf4a09 (patch)
tree01eb41daba7c2b57c3633942b7f256b213901c68 /target/linux/ath79
parent750e4b62b170c7709ebe2524588b35ff9faf0542 (diff)
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treewide: gpio-export: add error handling
Check if the GPIO is valid (or set at all). If no GPIO is set in the devicetree, a gpiolib related kernel warning + stacktrace is shown during boot and gpio-export reports GPIOs as exported albeit none really is. Signed-off-by: Mathias Kresin <dev@kresin.me>
Diffstat (limited to 'target/linux/ath79')
-rw-r--r--target/linux/ath79/patches-4.14/0024-GPIO-add-named-gpio-exports.patch4
1 files changed, 3 insertions, 1 deletions
diff --git a/target/linux/ath79/patches-4.14/0024-GPIO-add-named-gpio-exports.patch b/target/linux/ath79/patches-4.14/0024-GPIO-add-named-gpio-exports.patch
index 0c1bc73926..10ca24bc71 100644
--- a/target/linux/ath79/patches-4.14/0024-GPIO-add-named-gpio-exports.patch
+++ b/target/linux/ath79/patches-4.14/0024-GPIO-add-named-gpio-exports.patch
@@ -22,7 +22,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
#include "gpiolib.h"
-@@ -506,3 +508,69 @@ void of_gpiochip_remove(struct gpio_chip
+@@ -506,3 +508,71 @@ void of_gpiochip_remove(struct gpio_chip
gpiochip_remove_pin_ranges(chip);
of_node_put(chip->of_node);
}
@@ -56,6 +56,8 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ enum of_gpio_flags of_flags;
+
+ gpio = of_get_gpio_flags(cnp, i, &of_flags);
++ if (!gpio_is_valid(gpio))
++ return gpio;
+
+ if (of_flags == OF_GPIO_ACTIVE_LOW)
+ flags |= GPIOF_ACTIVE_LOW;