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Kernel: Keep reading from i8042 until the buffer is empty

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Otherwise we might not drain the mouse buffer until the next IRQ.
This commit is contained in:
Andreas Kling 2020-11-14 17:18:58 +01:00
parent a5982f8605
commit 467f6c74a4
1 changed files with 9 additions and 7 deletions
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2
Kernel/Devices/I8042Controller.cpp
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@ -149,6 +149,7 @@ void I8042Controller::irq_process_input_buffer(Device)
{ {
ASSERT(Processor::current().in_irq()); ASSERT(Processor::current().in_irq());
for (;;) {
u8 status = IO::in8(I8042_STATUS); u8 status = IO::in8(I8042_STATUS);
if (!(status & I8042_BUFFER_FULL)) if (!(status & I8042_BUFFER_FULL))
return; return;
@ -156,6 +157,7 @@ void I8042Controller::irq_process_input_buffer(Device)
u8 byte = IO::in8(I8042_BUFFER); u8 byte = IO::in8(I8042_BUFFER);
if (auto* device = m_devices[data_for_device == Device::Keyboard ? 0 : 1].device) if (auto* device = m_devices[data_for_device == Device::Keyboard ? 0 : 1].device)
device->irq_handle_byte_read(byte); device->irq_handle_byte_read(byte);
}
} }
void I8042Controller::do_drain() void I8042Controller::do_drain()