From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ohad Ben-Cohen Subject: Re: [linux-pm] runtime PM usage_count during driver_probe_device()? Date: Fri, 1 Jul 2011 08:57:40 +0300 Message-ID: References: <87k4c3dktm.fsf@ti.com> <87vcvmaml6.fsf@ti.com> <201107010233.12377.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail-ww0-f44.google.com ([74.125.82.44]:61953 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752655Ab1GAF6C convert rfc822-to-8bit (ORCPT ); Fri, 1 Jul 2011 01:58:02 -0400 Received: by wwe5 with SMTP id 5so2904533wwe.1 for ; Thu, 30 Jun 2011 22:58:00 -0700 (PDT) In-Reply-To: <201107010233.12377.rjw@sisk.pl> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: "Rafael J. Wysocki" Cc: linux-pm@lists.linux-foundation.org, Kevin Hilman , "linux-omap@vger.kernel.org" , Alan Stern On Fri, Jul 1, 2011 at 3:33 AM, Rafael J. Wysocki wrote: > In theory it is possible that a subsystem (e.g. bus type) will enable > runtime PM for devices without drivers and will (for example) put the= m > into low power states until the drivers are loaded. =A0Then, it makes > sense for the core to prevent such transitions from racing with .prob= e(). > > I'm not sure if this happens in practice, though, Yeah, this is exactly what the SDIO subsystem is doing. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html