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3b01e04379
The 8259a PIC has a well known problem of generating flaky IRQ7 interrupts. The correct solution is to always check if an IRQ7 interrupt is real or not by probing the PIC's ISR register. This check is only mandatory if the IRQ7 is actually being used by the system. More importantly, the handler should NEVER send and EOI if the interrupt was spurious. This patch addresses this issue by implementing a fake empty handler for this IRQ and, as stated, NOT sending the EOI. |
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