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authorBenjamin Tissoires <benjamin.tissoires@redhat.com>2019-08-12 18:04:44 +0200
committerJiri Kosina <jkosina@suse.cz>2019-08-19 14:13:00 +0200
commit2d05dba2b25ecb0f8fc3a0b4eb2232da6454a47b (patch)
treedd6628d1bdd38a416ad038de0796404e02827c94 /drivers/hid/hid-cp2112.c
parentb640be5bc8e4673dc8049cf74176ddedecea5597 (diff)
HID: cp2112: prevent sleeping function called from invalid context
When calling request_threaded_irq() with a CP2112, the function cp2112_gpio_irq_startup() is called in a IRQ context. Therefore we can not sleep, and we can not call cp2112_gpio_direction_input() there. Move the call to cp2112_gpio_direction_input() earlier to have a working driver. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-cp2112.c')
-rw-r--r--drivers/hid/hid-cp2112.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/hid/hid-cp2112.c b/drivers/hid/hid-cp2112.c
index 2310c96ccf4a..db1b55df0d13 100644
--- a/drivers/hid/hid-cp2112.c
+++ b/drivers/hid/hid-cp2112.c
@@ -1153,8 +1153,6 @@ static unsigned int cp2112_gpio_irq_startup(struct irq_data *d)
INIT_DELAYED_WORK(&dev->gpio_poll_worker, cp2112_gpio_poll_callback);
- cp2112_gpio_direction_input(gc, d->hwirq);
-
if (!dev->gpio_poll) {
dev->gpio_poll = true;
schedule_delayed_work(&dev->gpio_poll_worker, 0);
@@ -1204,6 +1202,12 @@ static int __maybe_unused cp2112_allocate_irq(struct cp2112_device *dev,
return PTR_ERR(dev->desc[pin]);
}
+ ret = cp2112_gpio_direction_input(&dev->gc, pin);
+ if (ret < 0) {
+ dev_err(dev->gc.parent, "Failed to set GPIO to input dir\n");
+ goto err_desc;
+ }
+
ret = gpiochip_lock_as_irq(&dev->gc, pin);
if (ret) {
dev_err(dev->gc.parent, "Failed to lock GPIO as interrupt\n");