diff options
| author | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-01-05 20:42:44 +0100 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-02-12 10:51:29 +0100 |
| commit | 47d8b4c1d868148c8fb51b785a89e58ca2d02c4d (patch) | |
| tree | 6d5415669bf65cdd09feaed8ec46053de68e4721 /drivers/gpio/gpiolib.c | |
| parent | 8a5b477bb3e9c891eb064accabb3162ccf2c590e (diff) | |
gpio: add SRCU infrastructure to struct gpio_device
Add the SRCU struct to GPIO device. It will be used to serialize access
to the GPIO chip pointer. Initialize and clean it up where applicable.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/gpio/gpiolib.c')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 40052de2361c..4e0c6df4a880 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -680,6 +680,7 @@ static void gpiodev_release(struct device *dev) ida_free(&gpio_ida, gdev->id); kfree_const(gdev->label); kfree(gdev->descs); + cleanup_srcu_struct(&gdev->srcu); kfree(gdev); } @@ -948,6 +949,10 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data, BLOCKING_INIT_NOTIFIER_HEAD(&gdev->device_notifier); init_rwsem(&gdev->sem); + ret = init_srcu_struct(&gdev->srcu); + if (ret) + goto err_remove_from_list; + #ifdef CONFIG_PINCTRL INIT_LIST_HEAD(&gdev->pin_ranges); #endif @@ -955,15 +960,15 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data, if (gc->names) { ret = gpiochip_set_desc_names(gc); if (ret) - goto err_remove_from_list; + goto err_cleanup_gdev_srcu; } ret = gpiochip_set_names(gc); if (ret) - goto err_remove_from_list; + goto err_cleanup_gdev_srcu; ret = gpiochip_init_valid_mask(gc); if (ret) - goto err_remove_from_list; + goto err_cleanup_gdev_srcu; ret = of_gpiochip_add(gc); if (ret) @@ -1038,6 +1043,8 @@ err_remove_of_chip: err_free_gpiochip_mask: gpiochip_remove_pin_ranges(gc); gpiochip_free_valid_mask(gc); +err_cleanup_gdev_srcu: + cleanup_srcu_struct(&gdev->srcu); err_remove_from_list: scoped_guard(mutex, &gpio_devices_lock) list_del_rcu(&gdev->list); |