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Kernel: Do not detect mouse or keyboard when handling IRQ for I8042

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Instead of detecting which flag was set in the status register, we can
use the instrument type passed to us. This works because the mouse and
keyboard use different IRQs.
This commit is contained in:
Jelle Raaijmakers 2021-10-24 19:59:56 +02:00 • committed by Andreas Kling
parent 26c84967fa
commit 8b3232121b
1 changed files with 3 additions and 4 deletions
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7
Kernel/Devices/HID/I8042Controller.cpp
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@ -131,21 +131,20 @@ UNMAP_AFTER_INIT void I8042Controller::detect_devices()
m_mouse_device->enable_interrupts();
}
bool I8042Controller::irq_process_input_buffer(HIDDevice::Type)
bool I8042Controller::irq_process_input_buffer(HIDDevice::Type instrument_type)
{
VERIFY(Processor::current_in_irq());
u8 status = IO::in8(I8042Port::Status);
if (!(status & I8042StatusFlag::OutputBuffer))
return false;
HIDDevice::Type data_for_device = ((status & I8042StatusFlag::SecondPS2PortOutputBuffer) == 0) ? HIDDevice::Type::Keyboard : HIDDevice::Type::Mouse;
u8 byte = IO::in8(I8042Port::Buffer);
if (data_for_device == HIDDevice::Type::Mouse) {
if (instrument_type == HIDDevice::Type::Mouse) {
VERIFY(m_mouse_device);
static_cast<PS2MouseDevice&>(*m_mouse_device).irq_handle_byte_read(byte);
return true;
}
if (data_for_device == HIDDevice::Type::Keyboard) {
if (instrument_type == HIDDevice::Type::Keyboard) {
VERIFY(m_keyboard_device);
static_cast<PS2KeyboardDevice&>(*m_keyboard_device).irq_handle_byte_read(byte);
return true;