From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934019AbeEIIS5 (ORCPT ); Wed, 9 May 2018 04:18:57 -0400 Received: from heliosphere.sirena.org.uk ([172.104.155.198]:33004 "EHLO heliosphere.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933860AbeEIISy (ORCPT ); Wed, 9 May 2018 04:18:54 -0400 Date: Wed, 9 May 2018 17:18:48 +0900 From: Mark Brown To: Wolfram Sang Cc: Grygorii Strashko , Baolin Wang , linux-i2c@vger.kernel.org, LKML Subject: Re: I2C PM overhaul needed? (Re: [PATCH 1/2] i2c: sprd: Prevent i2c accesses after suspend is called) Message-ID: <20180509081848.GO13402@sirena.org.uk> References: <99031524fa147e72451d26f54b24f36093c0d3fa.1523255712.git.baolin.wang@linaro.org> <20180427121417.auv4ppryegkprv32@ninjato> <20180502052336.i5f4yv2ho3za7qa7@tetsubishi> <3485f73f-e356-6db0-89fc-d51bf8bdab71@ti.com> <20180504122447.u3xgrkperxz5dpcz@ninjato> <20180505015458.GM13402@sirena.org.uk> <20180505083255.7gv3bcjxx3b6nzeb@ninjato> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="+mr2ctTDD1GjnQwB" Content-Disposition: inline In-Reply-To: <20180505083255.7gv3bcjxx3b6nzeb@ninjato> X-Cookie: Advancement in position. User-Agent: Mutt/1.9.5 (2018-04-13) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --+mr2ctTDD1GjnQwB Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Sat, May 05, 2018 at 10:32:55AM +0200, Wolfram Sang wrote: > > OTOH it does mean we might not notice things happening later than they > > should so it's not 100% clear... > What do you mean here? If someone is doing I/O later than they should currently we'll notice as they try to do something that needs interrupts with interrupts disabled. With transparent noirq then it'll just work on some percentage of systems with controllers that support that but fail on others. That may or may not be what we want but it's worth considering. --+mr2ctTDD1GjnQwB Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAlryrucACgkQJNaLcl1U h9AK6Qf/dL7AXD4YqQnivJm9tMvny93IdehkZgx7Vi+UAY43/JS6jtF+yyO5MCbB z8/rYVkh/TsjCYpfhfgEMhorcxrU706PFeADYU8p7MF89jQiFEiskV0gds+mogrv CP/Zvjtm1dmqnMwXtLvtnJe8yrsoMOzYkKqMBijSKWIWPJhSrYcTZfZrvWtfUFQ/ myNii5kUe+QI/l1XkOxTIoaOdkIh0jChpD/TOkcsNebzX7sI08RROEsKBVg6cAb0 D5ns8MUDtxftG+CITywfT3Vpxyb5jpb7gtSknvp4Tyw9ef+Q8QmGrzwgH9O5mKng fHdXFLL8QyKFg6rnzGoFie0l9tYrdQ== =Fd8g -----END PGP SIGNATURE----- --+mr2ctTDD1GjnQwB--