diff options
| author | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-02-21 11:21:03 +0100 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-02-26 16:43:51 +0100 |
| commit | 5d60c1e61fda628619605f5917aba62f071b7106 (patch) | |
| tree | 79525b695d1f41107c6cae9af9eae87e3eebfedc /drivers/gpio | |
| parent | 840a97e2fbaf5315f9705b97e99aa97e5e5fd6cb (diff) | |
| download | linux-5d60c1e61fda628619605f5917aba62f071b7106.tar.gz | |
gpio: don't warn about removing GPIO chips with active users anymore
With SRCU we can now correctly handle the situation when a GPIO provider
is removed while having users still holding references to GPIO
descriptors. Remove all warnings emitted in this situation.
Suggested-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Herve Codina <herve.codina@bootlin.com>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 20 |
1 files changed, 2 insertions, 18 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 3c22920bd201b..63e793a410e3f 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1106,7 +1106,6 @@ EXPORT_SYMBOL_GPL(gpiochip_add_data_with_key); void gpiochip_remove(struct gpio_chip *gc) { struct gpio_device *gdev = gc->gpiodev; - unsigned int i; /* FIXME: should the legacy sysfs handling be moved to gpio_device? */ gpiochip_sysfs_unregister(gdev); @@ -1130,15 +1129,6 @@ void gpiochip_remove(struct gpio_chip *gc) */ gpiochip_set_data(gc, NULL); - for (i = 0; i < gdev->ngpio; i++) { - if (test_bit(FLAG_REQUESTED, &gdev->descs[i].flags)) - break; - } - - if (i != gdev->ngpio) - dev_crit(&gdev->dev, - "REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED\n"); - /* * The gpiochip side puts its use of the device to rest here: * if there are no userspace clients, the chardev and device will @@ -2329,10 +2319,9 @@ int gpiod_request(struct gpio_desc *desc, const char *label) return ret; } -static bool gpiod_free_commit(struct gpio_desc *desc) +static void gpiod_free_commit(struct gpio_desc *desc) { unsigned long flags; - bool ret = false; might_sleep(); @@ -2357,23 +2346,18 @@ static bool gpiod_free_commit(struct gpio_desc *desc) #ifdef CONFIG_OF_DYNAMIC WRITE_ONCE(desc->hog, NULL); #endif - ret = true; desc_set_label(desc, NULL); WRITE_ONCE(desc->flags, flags); gpiod_line_state_notify(desc, GPIOLINE_CHANGED_RELEASED); } - - return ret; } void gpiod_free(struct gpio_desc *desc) { VALIDATE_DESC_VOID(desc); - if (!gpiod_free_commit(desc)) - WARN_ON(1); - + gpiod_free_commit(desc); module_put(desc->gdev->owner); gpio_device_put(desc->gdev); } |