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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 31512C48BE8 for ; Tue, 15 Jun 2021 05:17:49 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DDE1C61412 for ; Tue, 15 Jun 2021 05:17:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DDE1C61412 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 43EC889AA6; Tue, 15 Jun 2021 05:17:48 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id 63E9F89AA6; Tue, 15 Jun 2021 05:17:47 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 52A4A6140C; Tue, 15 Jun 2021 05:17:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1623734267; bh=o5H3N+ttWbWHWjYPgpfy4o3PJQZNstkMmkd4t2exljM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=dfVQlIxuSd9gn4cLpBWRc70JY9BVo+kBT3kLsMpn640l44DMJOp/FjwervZaIpAcv xAcvQdaEqyMEx85dY6PnCde9SRE0MVfPrcS5qBBdfb8TGIaT/RMFIeEu7Yat1tdv/O JlLnebQM+AZrIR4ysW8BHmz3OEKi7nb4wp2JtP0Q= Date: Tue, 15 Jun 2021 07:17:43 +0200 From: Greg Kroah-Hartman To: Christoph Hellwig Subject: Re: [PATCH 02/10] driver core: Better distinguish probe errors in really_probe Message-ID: References: <20210614150846.4111871-1-hch@lst.de> <20210614150846.4111871-3-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210614150846.4111871-3-hch@lst.de> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, linux-doc@vger.kernel.org, David Airlie , dri-devel@lists.freedesktop.org, Kirti Wankhede , linux-s390@vger.kernel.org, Jonathan Corbet , "Rafael J. Wysocki" , Halil Pasic , Christian Borntraeger , Jason Gunthorpe , intel-gfx@lists.freedesktop.org, Jason Herne , Vasily Gorbik , Heiko Carstens , Alex Williamson , Rodrigo Vivi , Tony Krowiak , Cornelia Huck Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Mon, Jun 14, 2021 at 05:08:38PM +0200, Christoph Hellwig wrote: > really_probe tries to special case errors from ->probe, but due to all > other initialization added to the function over time now a lot of > internal errors hit that code path as well. Untangle that by adding > a new probe_err local variable and apply the special casing only to > that. > > Signed-off-by: Christoph Hellwig > --- > drivers/base/dd.c | 72 +++++++++++++++++++++++++++-------------------- > 1 file changed, 41 insertions(+), 31 deletions(-) > > diff --git a/drivers/base/dd.c b/drivers/base/dd.c > index 7477d3322b3a..999bc737a8f0 100644 > --- a/drivers/base/dd.c > +++ b/drivers/base/dd.c > @@ -513,12 +513,42 @@ static ssize_t state_synced_show(struct device *dev, > } > static DEVICE_ATTR_RO(state_synced); > > + > +static int call_driver_probe(struct device *dev, struct device_driver *drv) > +{ > + int ret = 0; > + > + if (dev->bus->probe) > + ret = dev->bus->probe(dev); > + else if (drv->probe) > + ret = drv->probe(dev); > + > + switch (ret) { > + case -EPROBE_DEFER: > + /* Driver requested deferred probing */ > + dev_dbg(dev, "Driver %s requests probe deferral\n", drv->name); > + break; > + case -ENODEV: > + case -ENXIO: > + pr_debug("%s: probe of %s rejects match %d\n", > + drv->name, dev_name(dev), ret); > + break; > + default: > + /* driver matched but the probe failed */ > + pr_warn("%s: probe of %s failed with error %d\n", > + drv->name, dev_name(dev), ret); > + break; > + } Like Kirti said, 0 needs to be handled here. Did this not spew a lot of warnings in the logs? And we can fix up the pr_* calls to use dev_* in the future, shows the evolution of this code... thanks, greg k-h