Re: [PATCH] 2.4.21 Interrupt polarity fix

From: Bjorn Helgaas <bjorn.helgaas@hp.com>
Subject: Re: [PATCH] 2.4.21 Interrupt polarity fix
Date: Tue, 5 Aug 2003 16:16:07 -0600

> On Wednesday 30 July 2003 10:53 pm, Takayoshi Kochi wrote:
> > It seems that acpi_register_intr (in arch/ia64/kernel/acpi.c)
> > takes an interrupt polarity/trigger in opposite way.
> > Attached patch fixes this.  Please apply.
> 
> Thanks.  This was indeed very confusing.  I applied the
> following patch for 2.4.  The corresponding patch you
> posted on August 4 for 2.6 appears functionally identical
> but reverses the sense of the polarity test for no good
> reason.  Can you send David a revised patch that does
> it the same was as the one below?

Thanks for the comment.  The revised patch is attached.

---
1st Computer Software Division, NEC Corporation
Takayoshi Kochi <kochi@hpc.bs1.fc.nec.co.jp/t-kochi@bq.jp.nec.com>

Index: dcm-260t2/arch/ia64/kernel/acpi.c
===================================================================
RCS file: /data/cvsroot/lia64-2.5/arch/ia64/kernel/acpi.c,v
retrieving revision 1.1.1.19
diff -u -r1.1.1.19 acpi.c
--- dcm-260t2/arch/ia64/kernel/acpi.c	29 Jul 2003 10:33:17 -0000	1.1.1.19
+++ dcm-260t2/arch/ia64/kernel/acpi.c	6 Aug 2003 01:19:11 -0000
@@ -727,7 +727,9 @@
 		return 0;
 
 	/* Turn it on */
-	vector = iosapic_register_intr (gsi, polarity, trigger);
+	vector = iosapic_register_intr (gsi,
+			(polarity == ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
+			(trigger == ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
 	return vector;
 }
 

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