From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753969AbZFAAr5 (ORCPT ); Sun, 31 May 2009 20:47:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752850AbZFAArt (ORCPT ); Sun, 31 May 2009 20:47:49 -0400 Received: from bilbo.ozlabs.org ([203.10.76.25]:57772 "EHLO bilbo.ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752274AbZFAArs (ORCPT ); Sun, 31 May 2009 20:47:48 -0400 Subject: Re: MPC8343 - serial8250: too much work From: Michael Ellerman Reply-To: michael@ellerman.id.au To: Alemao Cc: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org In-Reply-To: References: Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-UpL8Ug4s3osT0+c/31iG" Date: Mon, 01 Jun 2009 10:47:48 +1000 Message-Id: <1243817268.4375.28.camel@concordia> Mime-Version: 1.0 X-Mailer: Evolution 2.26.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-UpL8Ug4s3osT0+c/31iG Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Fri, 2009-05-29 at 17:07 -0300, Alemao wrote: > Im facing some problems with serial, linux-2.6.23, getting flooded > with this message in logs: >=20 > --- > serial8250: too much work for irq16 > --- >=20 > Something I notice, in my .dts I have the following lines: >=20 > serial0: serial@4500, interrupts =3D <9 0x8> > serial1: serial@4600, interrupts =3D <10 0x8> > spi: spi@7000, interrupts =3D <16 0x8> >=20 >=20 > But when kernel starts: >=20 > --- > Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled > serial8250.0: ttyS0 at MMIO 0xe0004500 (irq =3D 16) is a 16550A > --- >=20 > Why IRQ 16? Shouldn't it be IRQ 9? No. Interrupt numbers are remapped on powerpc. If you were running a mainline kernel you'd see a message something like: irq: irq 9 on host ?? mapped to virtual irq 16 cheers --=-UpL8Ug4s3osT0+c/31iG Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEABECAAYFAkojJTQACgkQdSjSd0sB4dJ7bACfXBPpPRyorpEiJv+UEn1zbdvZ qYkAn30h1cAVrksQ+uVUAq19GvA1c/f9 =tMIl -----END PGP SIGNATURE----- --=-UpL8Ug4s3osT0+c/31iG--