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authorKimball Murray <kimball.murray@gmail.com>2006-05-08 17:17:16 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-05-08 20:34:56 +0400
commite0c1e9bf81badc7ba59e120d6218101903d5d103 (patch)
tree78f53a42795c935ff7a212d479c3fc00f0357ea3 /include/asm-i386/io_apic.h
parentabfd3057187812352cd8502c29ca50cd010b3ccc (diff)
downloadlinux-e0c1e9bf81badc7ba59e120d6218101903d5d103.tar.xz
[PATCH] x86_64: avoid IRQ0 ioapic pin collision
The patch addresses a problem with ACPI SCI interrupt entry, which gets re-used, and the IRQ is assigned to another unrelated device. The patch corrects the code such that SCI IRQ is skipped and duplicate entry is avoided. Second issue came up with VIA chipset, the problem was caused by original patch assigning IRQs starting 16 and up. The VIA chipset uses 4-bit IRQ register for internal interrupt routing, and therefore cannot handle IRQ numbers assigned to its devices. The patch corrects this problem by allowing PCI IRQs below 16. Cc: len.brown@intel.com Signed-off by: Natalie Protasevich <Natalie.Protasevich@unisys.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-i386/io_apic.h')
-rw-r--r--include/asm-i386/io_apic.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-i386/io_apic.h b/include/asm-i386/io_apic.h
index 51c4e5fe6062..d92e253f7f6f 100644
--- a/include/asm-i386/io_apic.h
+++ b/include/asm-i386/io_apic.h
@@ -200,6 +200,7 @@ extern int io_apic_get_unique_id (int ioapic, int apic_id);
extern int io_apic_get_version (int ioapic);
extern int io_apic_get_redir_entries (int ioapic);
extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low);
+extern int timer_uses_ioapic_pin_0;
#endif /* CONFIG_ACPI */
extern int (*ioapic_renumber_irq)(int ioapic, int irq);