Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933527AbbDJPQR (ORCPT ); Fri, 10 Apr 2015 11:16:17 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:44584 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933480AbbDJPQP (ORCPT ); Fri, 10 Apr 2015 11:16:15 -0400 Message-ID: <5527E8FF.7050104@pengutronix.de> Date: Fri, 10 Apr 2015 17:15:11 +0200 From: Marc Kleine-Budde User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:36.0) Gecko/20100101 Icedove/36.0 MIME-Version: 1.0 To: Mark Brown , Marcel Ziswiler CC: linux-can@vger.kernel.org, linux-spi@vger.kernel.org, linux@arm.linux.org.uk, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, Laxman Dewangan , Oliver Hartkopp , Wolfgang Grandegger , Thierry Reding , Stephen Warren , Alexandre Courbot , Stefan Agner , Himangi Saraogi , Julia Lawall , Stefano Babic , Christian Pellegrin , "DavidS.Miller" , Marc Zyngier , Sascha Hauer Subject: Re: [REGRESSION] commit 0461a41 "spi: Pump transfers inside calling context for spi_sync()" breaks Apalis/Colibri T30 with MCP2515 SPI CAN controller References: <1428670853.7008.87.camel@localhost.localdomain> <20150410132330.GH6023@sirena.org.uk> In-Reply-To: <20150410132330.GH6023@sirena.org.uk> Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="wfG8euhQrESrjeIrSeTWvVv3P9BILVKXO" X-SA-Exim-Connect-IP: 2001:6f8:1178:4:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: mkl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2595 Lines: 63 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --wfG8euhQrESrjeIrSeTWvVv3P9BILVKXO Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 04/10/2015 03:23 PM, Mark Brown wrote: > On Fri, Apr 10, 2015 at 03:00:53PM +0200, Marcel Ziswiler wrote: >> Hi there >=20 > Please try to use somewhat more targetted CC lists... >=20 >> I also have not yet looked further into what exactly is happening and >> whether or not the SPI stack, the Tegra SPI controller driver or the >> MCP2515 SPI CAN driver is to blame but rather decided to ask Mr. Brown= >> and the community first for any insights they might have to share. >> Anybody? >=20 > I'd ask for trace logs but obviously we can't turn them on until boot > has finished... Adding some trace in the relevant bits of code to try > to see where it's deadlocking is the obvious first step. FWIW: the mcp2515 driver is accessing the SPI bus during probe(). Seems you have to instrument the SPI stack and/or host driver. Marc --=20 Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de | --wfG8euhQrESrjeIrSeTWvVv3P9BILVKXO Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCgAGBQJVJ+kCAAoJECte4hHFiupUv7IP/j2LqRbj+5HeXLthNT5xQxhn IeSCIbXU2ohGHPRrEkXbuO0BbQYOsC9PoX3D0TB77iQzeKtBPJ+wDuPGhj/jIc1P ZLbry+sDe0RaYhNdfKGcLYMNMqbBf08+NcFQxf9tmTAFkDA+7n9H+CBvg4QWj1p5 nvUjyHf/kz4zFHUx6qJnKzEL7ysqxYtOuYMUOCWj5G3EiIsVkmr3l32nj0vdREh1 WgF6xqu9xu6h/6FSKsNlOFKZM3MS4fOX+AgPsMdvj7aqZyxMABV74XOQg0KInwlQ /bdEdiMozLJK9Snnhar2dYwxqopZgONKAsOMJ4WqawjRzdKuLnv6SYxTsIpI/Vmz tUZ5UW9W5Jouuy1LrXSxqcdjb8Spl6jDKbNvkUx2hOB+B3dYqIi8/Wab0CJpVadK w6WC+qNuh3aef/nHw9mw3AY3gqx1YyNEtG2FL7hcn04YcR+1yrCfdYw63U7mBJ5X Iyxsj0jZZPiWymk0S12QnTjeVI5ooEAx4tG1wPr8805ROeeU1VfujRON0IwkyrsU 9uImSuRRkH7D6jJO124iuOR5Q2Sb8/LcXYWi9YLSgbNQESmlPuwtKsrbYAWVp3aw hZLkWb3B/ymrAQ1BMV38yG8WVNjQkiKDAg7BHcAx/TTpK0ECEA/sUSZl3t3B0tqK ny6epGxrOWZrLHKnt3TO =xDk+ -----END PGP SIGNATURE----- --wfG8euhQrESrjeIrSeTWvVv3P9BILVKXO-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/