Re: [PATCH] Allow OpenPIC irq 0 to be used
From: Val Henson <hidden>
Date: 2002-04-16 00:59:54
Hm, in retrospect, I didn't state the actual bug very clearly. On Synergy boards, devices can't get interrupts on irq 0 because it is never initialized. This patch fixes that, hopefully without introducing bugs in other boards. -VAL On Mon, Apr 15, 2002 at 01:43:22PM -0600, Val Henson wrote:
quoted hunk
Synergy boards do not have an i8259 hooked up to irq 0, instead we actually use it as a normal irq line. Yes, I know, bad idea, but we're stuck with it. The following patch is ugly, but illustrates the general idea in a way which might possibly be compatible with other OpenPIC boards. -VAL ===== arch/ppc/kernel/open_pic.c 1.47 vs edited =====--- 1.47/arch/ppc/kernel/open_pic.c Tue Feb 5 03:10:24 2002 +++ edited/arch/ppc/kernel/open_pic.c Mon Apr 15 13:42:12 2002@@ -366,7 +366,7 @@ } /* Init all external sources */ - for (i = 1; i < NumSources; i++) { + for (i = offset ? 1 : 0; i < NumSources; i++) { int pri, sense; if (ISR[i] == 0)
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