From: Val Henson <val@nmt.edu>
To: linuxppc-dev@lists.linuxppc.org
Subject: Re: [PATCH] Allow OpenPIC irq 0 to be used
Date: Mon, 15 Apr 2002 18:59:54 -0600 [thread overview]
Message-ID: <20020415185954.J17647@boardwalk> (raw)
In-Reply-To: <20020415134322.E15153@boardwalk>; from val@nmt.edu on Mon, Apr 15, 2002 at 01:43:22PM -0600
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:
>
> 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)
>
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
prev parent reply other threads:[~2002-04-16 0:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-15 19:43 [PATCH] Allow OpenPIC irq 0 to be used Val Henson
2002-04-16 0:59 ` Val Henson [this message]
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