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Kernel: Clear pending interrupts before enabling IRQs of IDE Channel

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Calling detect_disks() can generate interrupts, so we must clear it to
allow proper function when booting with kernel argument smp=on.
This commit is contained in:
Liav A 2021-02-05 06:51:47 +02:00 committed by Andreas Kling
parent f2faf11d61
commit 865aade42b
Notes: sideshowbarker 2024-07-18 22:35:17 +09:00 
Author: https://github.com/supercomputer7
Commit: https://github.com/SerenityOS/serenity/commit/865aade42b4
Pull-request: https://github.com/SerenityOS/serenity/pull/5236
Issue: https://github.com/SerenityOS/serenity/issues/5229
2 changed files with 10 additions and 0 deletions
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8
Kernel/Storage/IDEChannel.cpp
View file

@ -142,9 +142,17 @@ IDEChannel::IDEChannel(const IDEController& controller, IOAddressGroup io_group,
initialize(force_pio);
detect_disks();
// Note: calling to detect_disks could generate an interrupt, clear it if that's the case
clear_pending_interrupts();
enable_irq();
}
void IDEChannel::clear_pending_interrupts() const
{
m_io_group.io_base().offset(ATA_REG_STATUS).in<u8>();
}
IDEChannel::~IDEChannel()
{
}

2
Kernel/Storage/IDEChannel.h
View file

@ -138,6 +138,8 @@ private:
void start_request(AsyncBlockDeviceRequest&, bool, bool, u16);
void complete_current_request(AsyncDeviceRequest::RequestResult);
void clear_pending_interrupts() const;
void ata_access(Direction, bool, u32, u8, u16, bool);
void ata_read_sectors_with_dma(bool, u16);
void ata_read_sectors(bool, u16);