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Kernel: Set IRQHandler m_shared_with_others when the irq is shared
If IRQHandler's IRQ is shared, then disable_irq() should not call the controller to disable that IRQ as some other device might be using it. IRQHandler had a private variable to indicate if it is being shared: m_shared_with_others but it was never modified even if the IRQ was shared. Add a new member function set_shared_with_others() to enable/disable m_shared_with_others member of IRQHandler class. This function is called when an IRQHandler is being added/removed as a part of SharedIRQHandler.
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2 changed files with 4 additions and 0 deletions
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@ -11,6 +11,7 @@
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#include <Kernel/Arch/Interrupts.h>
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#include <Kernel/Arch/x86_64/Interrupts/PIC.h>
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#include <Kernel/Interrupts/GenericInterruptHandler.h>
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#include <Kernel/Interrupts/IRQHandler.h>
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#include <Kernel/Interrupts/SharedIRQHandler.h>
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#include <Kernel/Interrupts/SpuriousInterruptHandler.h>
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#include <Kernel/Interrupts/UnhandledInterruptHandler.h>
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@ -371,6 +372,7 @@ void register_generic_interrupt_handler(u8 interrupt_number, GenericInterruptHan
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return;
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}
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VERIFY(handler_slot->type() == HandlerType::IRQHandler);
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static_cast<IRQHandler*>(handler_slot)->set_shared_with_others(true);
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auto& previous_handler = *handler_slot;
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handler_slot = nullptr;
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SharedIRQHandler::initialize(interrupt_number);
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@ -400,6 +402,7 @@ void unregister_generic_interrupt_handler(u8 interrupt_number, GenericInterruptH
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}
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if (!handler_slot->is_shared_handler()) {
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VERIFY(handler_slot->type() == HandlerType::IRQHandler);
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static_cast<IRQHandler*>(handler_slot)->set_shared_with_others(false);
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handler_slot = nullptr;
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revert_to_unused_handler(interrupt_number);
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return;
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