RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 16:37:35 +00:00
Code Issues Activity Actions

Kernel/USB: Ignore shared IRQs

Browse source 
According the USB spec/UHCI datasheet (as well as the Linux and
BSD source code), if we receive an IRQ and USBSTS is 0, then
the IRQ does not belong to us and we should immediately jump
out of the handler.
This commit is contained in:
Jesse Buhagiar 2021-01-03 16:01:52 +11:00 • committed by Andreas Kling
parent 770a729e59
commit ff4afe17be
1 changed files with 4 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

4
Kernel/Devices/USB/UHCIController.cpp
View file

@ -395,6 +395,10 @@ void UHCIController::spawn_port_proc()
void UHCIController::handle_irq(const RegisterState&)
{
// Shared IRQ. Not ours!
if(!read_usbsts())
return;
klog() << "UHCI: Interrupt happened!";
klog() << "Value of USBSTS: " << read_usbsts();
}