From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6E443C46467 for ; Tue, 10 Jan 2023 22:43:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234823AbjAJWnZ (ORCPT ); Tue, 10 Jan 2023 17:43:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50426 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233979AbjAJWnO (ORCPT ); Tue, 10 Jan 2023 17:43:14 -0500 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A67765EC07 for ; Tue, 10 Jan 2023 14:43:13 -0800 (PST) Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=bjornoya.blackshift.org) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pFNKp-00081j-JM; Tue, 10 Jan 2023 23:43:11 +0100 Received: from pengutronix.de (unknown [IPv6:2a03:f580:87bc:d400:5d1d:2f90:6e72:2410]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) (Authenticated sender: mkl-all@blackshift.org) by smtp.blackshift.org (Postfix) with ESMTPSA id B7681153B79; Tue, 10 Jan 2023 22:43:10 +0000 (UTC) Date: Tue, 10 Jan 2023 23:43:02 +0100 From: Marc Kleine-Budde To: Thomas.Kopp@microchip.com Cc: Stefan.Althoefer@janztec.com, linux-can@vger.kernel.org Subject: Re: RE: RE: AW: AW: mcp251xfd: Bad message receiption (1/2) Message-ID: <20230110224302.v2eqqunjo2zhpfrf@pengutronix.de> References: <20230110145322.4bqwlw3owesc5myj@pengutronix.de> <20230110170857.5ejgppyjnoc2adji@pengutronix.de> <20230110183952.pvtuw5gudefnnyv5@pengutronix.de> <20230110215033.xcz7g3ubonuawqr5@pengutronix.de> <20230110223744.mzktwinp54cad6ow@pengutronix.de> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="wwddhzuoku7f3lk7" Content-Disposition: inline In-Reply-To: <20230110223744.mzktwinp54cad6ow@pengutronix.de> X-SA-Exim-Connect-IP: 2001:67c:670:201:5054: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-can@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-can@vger.kernel.org --wwddhzuoku7f3lk7 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 10.01.2023 23:37:44, Marc Kleine-Budde wrote: > On 10.01.2023 22:50:33, Marc Kleine-Budde wrote: > > On 10.01.2023 21:40:16, Thomas.Kopp@microchip.com wrote: > > > > The correct message counter is 0x100, the wrong one 0x120. That's 2x > > > > FIFO size. I'd like to know when the FIFO head is wrong for the fir= st > > > > time, one that results in a data transfer where "old" FIFO contents= is > > > > read. I haven't dumped any data yet. > >=20 > > I got a chip-delta =3D=3D 4 error. >=20 > I have a proof of concept workaround implemented and I'll let it run > over night. \o/ The workaround triggered and Stefan's test program continued without problems \o/ g'night, Marc --=20 Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | --wwddhzuoku7f3lk7 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEBsvAIBsPu6mG7thcrX5LkNig010FAmO96fMACgkQrX5LkNig 011D2AgAj9Iqz0vrnAsqJ4vkVKQFQAVQ4pVBq1lcso0sGerN2hlKBz3RpNh7dq30 QEdYvZDzI6/cbbT/vlF4tlGawgAY65MPt1iIfbEcf7PjwoPTEZprH705OIuY7gu+ AqZw0X/G24hH4pHJpf7stUJN9qsiwi4Q93ulIdJlRvnGOfzSoXCdKUVVIj2CeEWF b5ETc25y73XHP/t1VY5qa8iL1FNlqQ6r/afI7fdCybAfkPHifQoO2ZXlZ+vuRoMP o2HpfiHVMlLRtS8yE+3qTL6YX311W3vmf+e1N1J+FWxJJeG6KF7zBNBdM+JihabN rAH4MRxlY67/6tDuI1j2UQKJ5Vk7tw== =A35r -----END PGP SIGNATURE----- --wwddhzuoku7f3lk7--