diff options
| author | Kent Gibson <warthog618@gmail.com> | 2024-05-29 15:19:52 +0200 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-05-30 11:29:10 +0200 |
| commit | 4ce5ca654a761462a222164e96b8ab953b8cacab (patch) | |
| tree | 4713967dfd8c6f28265068f27704742fa5949f04 /drivers/gpio | |
| parent | gpiolib: cdev: Add INIT_KFIFO() for linereq events (diff) | |
| download | linux-4ce5ca654a761462a222164e96b8ab953b8cacab.tar.xz linux-4ce5ca654a761462a222164e96b8ab953b8cacab.zip | |
gpiolib: cdev: Refactor allocation of linereq events kfifo
The allocation of the linereq events kfifo is performed in two separate
places. Add a helper function to remove the duplication.
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Link: https://lore.kernel.org/r/20240529131953.195777-3-warthog618@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib-cdev.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c index d4e47960cc98..c7218c9f2c5e 100644 --- a/drivers/gpio/gpiolib-cdev.c +++ b/drivers/gpio/gpiolib-cdev.c @@ -1128,6 +1128,14 @@ static void edge_detector_stop(struct line *line) /* do not change line->level - see comment in debounced_value() */ } +static int edge_detector_fifo_init(struct linereq *req) +{ + if (kfifo_initialized(&req->events)) + return 0; + + return kfifo_alloc(&req->events, req->event_buffer_size, GFP_KERNEL); +} + static int edge_detector_setup(struct line *line, struct gpio_v2_line_config *lc, unsigned int line_idx, u64 edflags) @@ -1139,9 +1147,8 @@ static int edge_detector_setup(struct line *line, char *label; eflags = edflags & GPIO_V2_LINE_EDGE_FLAGS; - if (eflags && !kfifo_initialized(&line->req->events)) { - ret = kfifo_alloc(&line->req->events, - line->req->event_buffer_size, GFP_KERNEL); + if (eflags) { + ret = edge_detector_fifo_init(line->req); if (ret) return ret; } @@ -1193,8 +1200,6 @@ static int edge_detector_update(struct line *line, struct gpio_v2_line_config *lc, unsigned int line_idx, u64 edflags) { - u64 eflags; - int ret; u64 active_edflags = READ_ONCE(line->edflags); unsigned int debounce_period_us = gpio_v2_line_config_debounce_period(lc, line_idx); @@ -1210,14 +1215,9 @@ static int edge_detector_update(struct line *line, * ensure event fifo is initialised if edge detection * is now enabled. */ - eflags = edflags & GPIO_V2_LINE_EDGE_FLAGS; - if (eflags && !kfifo_initialized(&line->req->events)) { - ret = kfifo_alloc(&line->req->events, - line->req->event_buffer_size, - GFP_KERNEL); - if (ret) - return ret; - } + if (edflags & GPIO_V2_LINE_EDGE_FLAGS) + return edge_detector_fifo_init(line->req); + return 0; } |