提交 33fb0e4e 编写于 作者: A Andreas Herrmann 提交者: Ingo Molnar

x86: SB450: skip IRQ0 override if it is not routed to INT2 of IOAPIC

On some HP nx6... laptops (e.g. nx6325) BIOS reports an IRQ0 override
but the SB450 chipset is configured such that timer interrupts goe to
INT0 of IOAPIC.

Check IRQ0 routing and if it is routed to INT0 of IOAPIC skip the
timer override.

[ This more generic PCI ID based quirk should alleviate the need for
  dmi_ignore_irq0_timer_override DMI quirks. ]
Signed-off-by: NAndreas Herrmann <andreas.herrmann3@amd.com>
Acked-by: N"Maciej W. Rozycki" <macro@linux-mips.org>
Tested-by: NDmitry Torokhov <dtor@mail.ru>
Cc: <stable@kernel.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
上级 4330ed8e
......@@ -95,6 +95,52 @@ static void __init nvidia_bugs(int num, int slot, int func)
}
static u32 ati_ixp4x0_rev(int num, int slot, int func)
{
u32 d;
u8 b;
b = read_pci_config_byte(num, slot, func, 0xac);
b &= ~(1<<5);
write_pci_config_byte(num, slot, func, 0xac, b);
d = read_pci_config(num, slot, func, 0x70);
d |= 1<<8;
write_pci_config(num, slot, func, 0x70, d);
d = read_pci_config(num, slot, func, 0x8);
d &= 0xff;
return d;
}
static void __init ati_bugs(int num, int slot, int func)
{
#if defined(CONFIG_ACPI) && defined (CONFIG_X86_IO_APIC)
u32 d;
u8 b;
if (acpi_use_timer_override)
return;
d = ati_ixp4x0_rev(num, slot, func);
if (d < 0x82)
acpi_skip_timer_override = 1;
else {
/* check for IRQ0 interrupt swap */
outb(0x72, 0xcd6); b = inb(0xcd7);
if (!(b & 0x2))
acpi_skip_timer_override = 1;
}
if (acpi_skip_timer_override) {
printk(KERN_INFO "SB4X0 revision 0x%x\n", d);
printk(KERN_INFO "Ignoring ACPI timer override.\n");
printk(KERN_INFO "If you got timer trouble "
"try acpi_use_timer_override\n");
}
#endif
}
#define QFLAG_APPLY_ONCE 0x1
#define QFLAG_APPLIED 0x2
#define QFLAG_DONE (QFLAG_APPLY_ONCE|QFLAG_APPLIED)
......@@ -114,6 +160,8 @@ static struct chipset early_qrk[] __initdata = {
PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, QFLAG_APPLY_ONCE, via_bugs },
{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB,
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, fix_hypertransport_config },
{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs },
{}
};
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册