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usb_hid_drv: wait for keyboard LED registry in 'led_connect()'

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It can happen that a keyboard gets plugged in and 'led_connect()' is
called while the keyboard LED of another keyboard is just being updated
(and the registry is locked).

Fixes #3118
This commit is contained in:
Christian Prochaska 2019-01-14 18:23:05 +01:00 committed by Norman Feske
parent ece5cbbbb5
commit 21ed41da9a
1 changed files with 2 additions and 0 deletions
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2
repos/dde_linux/src/drivers/usb_hid/evdev.cc
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@ -422,6 +422,8 @@ static Genode::Constructible<Usb::Led> _led;
static int led_connect(struct input_handler *handler, struct input_dev *dev, static int led_connect(struct input_handler *handler, struct input_dev *dev,
const struct input_device_id *id) const struct input_device_id *id)
{ {
_led->wait_for_registry();
Keyboard_led *keyboard = new (Lx_kit::env().heap()) Keyboard_led(_registry, dev); Keyboard_led *keyboard = new (Lx_kit::env().heap()) Keyboard_led(_registry, dev);
_led->update(*keyboard); _led->update(*keyboard);