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 X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D5B4FC169C4 for ; Tue, 29 Jan 2019 17:15:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A57DC2184D for ; Tue, 29 Jan 2019 17:15:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548782152; bh=neEVqxI62HSh/GSii2bA1jU0sPmvhXZXWFhx+WADyKI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=JI5gpoUNJfxG+LXuqFb3K8ILyWwHLUcFZp8j1nR521XBFtQyks34WSj4xcsvgd3pM eY4DvlHSkuCXwfh5HOXTBwQ1XZ83pkSzfxCsh6TRWjoM7DSRhK4czm5Gve1MbBQIBy LlXyDKa0nkM8P5/9rjXzKwKjP4pvgsAkvOwvIhkA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728601AbfA2RPv (ORCPT ); Tue, 29 Jan 2019 12:15:51 -0500 Received: from heliosphere.sirena.org.uk ([172.104.155.198]:49592 "EHLO heliosphere.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727100AbfA2RPu (ORCPT ); Tue, 29 Jan 2019 12:15:50 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sirena.org.uk; s=20170815-heliosphere; h=In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=N/XmHESboUUMJJBSD+32AfmHQP/9IBFP/cJxLE6FwcQ=; b=I/M1J8Peo7tXO9tySrEQX1WYX RGQG+qPY7kKRvw+MzqFWBxfq2ZypNA44s/f5T+VEZW5wbor3mcqUXYv8vkkTIP7RhIB9T3UMBxjk6 KN+8JZB+luQ3hFcyO8W3UHZx+wIX/JlgWa7/tXKYsBnHILb5fvLXPUQ+XdX9HMMkyzrFw=; Received: from cpc102320-sgyl38-2-0-cust46.18-2.cable.virginm.net ([82.37.168.47] helo=debutante.sirena.org.uk) by heliosphere.sirena.org.uk with esmtpa (Exim 4.89) (envelope-from ) id 1goWz9-0000jO-SL; Tue, 29 Jan 2019 17:15:43 +0000 Received: by debutante.sirena.org.uk (Postfix, from userid 1000) id 3ED1B1127D50; Tue, 29 Jan 2019 17:15:38 +0000 (GMT) Date: Tue, 29 Jan 2019 17:15:38 +0000 From: Mark Brown To: Tony Lindgren Cc: Doug Anderson , Sebastian Reichel , LKML , Linux ARM , linux-omap Subject: Re: New underflow of regulator enable count warnings in v5.0-rc1 Message-ID: <20190129171538.GH10524@sirena.org.uk> References: <20190129164813.GA5720@atomide.com> <20190129171151.GC5720@atomide.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="BXr400anF0jyguTS" Content-Disposition: inline In-Reply-To: <20190129171151.GC5720@atomide.com> X-Cookie: What foods these morsels be! User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --BXr400anF0jyguTS Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Jan 29, 2019 at 09:11:51AM -0800, Tony Lindgren wrote: > OK. Let's see if Sebastian spots where pwm_vibrator_start() > and pwm_vibrator_stop() might get called multiple times > or something similar. Given that nobody has noticed that the driver stops working entirely it's possible that the pattern is something like: pwm_vibrator_start() pwm_vibrator_stop() pwm_vibrator_stop() pwm_vibrator_start() so it's a temporary underflow that gets corrected (or it could be that not many people are using mainline kernels on these systems). On your system it's the dummy driver but presumably some other users have it connected to actual regulators. --BXr400anF0jyguTS Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAlxQijkACgkQJNaLcl1U h9A4cwf/aclPNONX4zH51MhkLG5+5pZu6gbqGvweUIvCUzuMLek/X/ryb4N6TYlo ku47rPQwnXAif8zc1WEHu3cbPxoPW5duseH8192orcrGc0KPSGnFkJVhU6fvNVu4 qIlZRwy7EMzWsPq/BXIz6WEQCMa/RcRGL0I7jpKd136ROJRQbrQxWF2iixSMHOuU qtMyEgni1HZMFYt1nB2EUlkwMiWdJmMBQgfMzQMORKoiPWWZvebeayTohFsjbGIM mu8Bu6AkJ/BEOpH4KKlC4FA+8SVHc0bGDvrfu/BG0ykfh6O0m/uC3f4aUztfIrLe 1Si0xmVD0bI64+AYC2bQUMmB0g0Gag== =9aT2 -----END PGP SIGNATURE----- --BXr400anF0jyguTS--