[PATCH 008/241] gpiolib: Don't return -EPROBE_DEFER to sysfs, or for invalid gpios
From: Herton Ronaldo Krzesinski
Date: Thu Dec 13 2012 - 10:11:09 EST
3.5.7.2 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
commit ad2fab36d7922401c4576fb7ea9b21a47a29a17f upstream.
gpios requested with invalid numbers, or gpios requested from userspace via sysfs
should not try to be deferred on failure.
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@xxxxxxxxxxxxx>
---
drivers/gpio/gpiolib.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 120b2a0..bd76017 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -623,9 +623,11 @@ static ssize_t export_store(struct class *class,
*/
status = gpio_request(gpio, "sysfs");
- if (status < 0)
+ if (status < 0) {
+ if (status == -EPROBE_DEFER)
+ status = -ENODEV;
goto done;
-
+ }
status = gpio_export(gpio, true);
if (status < 0)
gpio_free(gpio);
@@ -1191,8 +1193,10 @@ int gpio_request(unsigned gpio, const char *label)
spin_lock_irqsave(&gpio_lock, flags);
- if (!gpio_is_valid(gpio))
+ if (!gpio_is_valid(gpio)) {
+ status = -EINVAL;
goto done;
+ }
desc = &gpio_desc[gpio];
chip = desc->chip;
if (chip == NULL)
--
1.7.9.5
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