Commit-ID: 1ea76fbadd667b19c4fa4466f3a3b55a505e83d9
Gitweb: http://git.kernel.org/tip/1ea76fbadd667b19c4fa4466f3a3b55a505e83d9
Author: Jiang Liu <jiang....@linux.intel.com>
AuthorDate: Mon, 16 Feb 2015 10:11:13 +0800
Committer: Ingo Molnar <mi...@kernel.org>
CommitDate: Wed, 18 Feb 2015 15:01:41 +0100
x86/irq: Fix regression caused by commit b568b8601f05
Commit b568b8601f05 ("Treat SCI interrupt as normal GSI interrupt")
accidently removes support of legacy PIC interrupt when fixing a
regression for Xen, which causes a nasty regression on HP/Compaq
nc6000 where we fail to register the ACPI interrupt, and thus
lose eg. thermal notifications leading a potentially overheated
machine.
So reintroduce support of legacy PIC based ACPI SCI interrupt.
Reported-by: Ville Syrjälä <syrj...@sci.fi>
Tested-by: Ville Syrjälä <syrj...@sci.fi>
Signed-off-by: Jiang Liu <jiang....@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Acked-by: Pavel Machek <pa...@ucw.cz>
Cc: <sta...@vger.kernel.org> # 3.19+
Cc: H. Peter Anvin <h...@zytor.com>
Cc: Len Brown <len.br...@intel.com>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: Rafael J. Wysocki <r...@rjwysocki.net>
Cc: Sander Eikelenboom <li...@eikelenboom.it>
Cc: linux...@vger.kernel.org
Link:
http://lkml.kernel.org/r/1424052673-22974-1-git-send-email-jiang....@linux.intel.com
Signed-off-by: Ingo Molnar <mi...@kernel.org>
---
arch/x86/kernel/acpi/boot.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index a18fff3..8b59163 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -613,6 +613,11 @@ int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
{
int rc, irq, trigger, polarity;
+ if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
+ *irqp = gsi;
+ return 0;
+ }
+
rc = acpi_get_override_irq(gsi, &trigger, &polarity);
if (rc == 0) {
trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
--
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