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From: Mark Brown <broonie@kernel.org>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	"open list:DRM DRIVERS" <dri-devel@lists.freedesktop.org>,
	Russell King - ARM Linux <linux@armlinux.org.uk>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Andrzej Hajda <a.hajda@samsung.com>,
	Jonas Karlman <jonas@kwiboo.se>,
	Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
	linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
	Marek Szyprowski <m.szyprowski@samsung.com>
Subject: Re: [RESEND PATCH v5 1/5] driver core: add probe_err log helper
Date: Wed, 24 Jun 2020 15:02:07 +0100	[thread overview]
Message-ID: <20200624140207.GE5472@sirena.org.uk> (raw)
In-Reply-To: <CAHp75Ve9V1Vyxe3bEeHJ9H2J900wUXHMmXFJt-dn9sO5OMejHA@mail.gmail.com>


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On Wed, Jun 24, 2020 at 04:45:28PM +0300, Andy Shevchenko wrote:
> On Wed, Jun 24, 2020 at 4:27 PM Mark Brown <broonie@kernel.org> wrote:

> > As I said down the thread that's not a great pattern since it means that
> > probe deferral errors never get displayed and users have a hard time
> > figuring out why their driver isn't instantiating.

> Don't we have a file in the debugfs to list deferred drivers?

Part of what this patch series aims to solve is that that list is not
very useful since it doesn't provide any information on how things got
deferred which means it's of no use in trying to figure out any
problems.

> In the case of deferred probes the errors out of it makes users more
> miserable in order to look through tons of spam and lose really useful
> data in the logs.

I seem to never manage to end up using any of the systems which generate
excessive deferrals.

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  reply	other threads:[~2020-06-24 14:02 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20200624114134eucas1p2799e0ae76fcb026a0e4bcccc2026b732@eucas1p2.samsung.com>
2020-06-24 11:41 ` [RESEND PATCH v5 0/5] driver core: add probe error check helper Andrzej Hajda
     [not found]   ` <CGME20200624114135eucas1p26e2e4683d60cebdce7acd55177013992@eucas1p2.samsung.com>
2020-06-24 11:41     ` [RESEND PATCH v5 1/5] driver core: add probe_err log helper Andrzej Hajda
2020-06-24 11:52       ` Rafael J. Wysocki
2020-06-24 12:31       ` Greg Kroah-Hartman
2020-06-24 13:23         ` Laurent Pinchart
2020-06-24 14:04           ` Andrzej Hajda
2020-06-24 13:27       ` Mark Brown
2020-06-24 13:45         ` Andy Shevchenko
2020-06-24 14:02           ` Mark Brown [this message]
2020-06-24 15:00             ` Robin Murphy
2020-06-24 15:28               ` Mark Brown
     [not found]   ` <CGME20200624114136eucas1p1a3a31d95d86754201c7965f26ccd5de0@eucas1p1.samsung.com>
2020-06-24 11:41     ` [RESEND PATCH v5 2/5] driver core: add deferring probe reason to devices_deferred property Andrzej Hajda
2020-06-24 12:11       ` Rafael J. Wysocki
2020-06-24 13:28         ` Andrzej Hajda
2020-06-24 12:34       ` Greg Kroah-Hartman
2020-06-24 13:26         ` Andrzej Hajda
     [not found]   ` <CGME20200624114136eucas1p1c84f81b1d78e2dbad7ac1b762f0a4b4f@eucas1p1.samsung.com>
2020-06-24 11:41     ` [RESEND PATCH v5 3/5] drivers core: allow probe_err accept integer and pointer types Andrzej Hajda
2020-06-24 12:14       ` Rafael J. Wysocki
2020-06-24 14:44         ` Andrzej Hajda
2020-06-24 14:55           ` Rafael J. Wysocki
2020-06-24 12:30       ` Greg Kroah-Hartman
2020-06-24 14:48         ` Andrzej Hajda
2020-06-24 12:37       ` Robin Murphy
2020-06-24 12:55         ` Andy Shevchenko
2020-06-24 14:25           ` Robin Murphy
2020-06-24 15:04             ` Mark Brown
2020-06-24 15:16               ` Robin Murphy
2020-06-24 19:39                 ` Andrzej Hajda
2020-06-25  8:41                   ` Andy Shevchenko
2020-06-25 10:19                     ` Andrzej Hajda
2020-06-24 13:29         ` Laurent Pinchart
2020-06-24 12:53       ` Andy Shevchenko
2020-06-24 13:12         ` Andrzej Hajda
     [not found]   ` <CGME20200624114137eucas1p13599d33a0c4a9abf7708bf8c8e77264b@eucas1p1.samsung.com>
2020-06-24 11:41     ` [RESEND PATCH v5 4/5] drm/bridge/sii8620: fix resource acquisition error handling Andrzej Hajda
2020-06-24 13:25       ` Mark Brown
2020-06-24 13:43         ` Andrzej Hajda
2020-06-24 14:11           ` Mark Brown
     [not found]   ` <CGME20200624114138eucas1p262505da3ad1067720080d20209ff32de@eucas1p2.samsung.com>
2020-06-24 11:41     ` [RESEND PATCH v5 5/5] drm/bridge: lvds-codec: simplify error handling code Andrzej Hajda
2020-06-24 13:33       ` Laurent Pinchart
2020-06-24 14:03         ` Andrzej Hajda
2020-06-24 21:18           ` Laurent Pinchart

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