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Subject: Re: [PATCH v9 0/4] driver core: add probe error check helper
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     Jernej Skrabec <jernej.skrabec@siol.net>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Jonas Karlman <jonas@kwiboo.se>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        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>,
        andy.shevchenko@gmail.com, Mark Brown <broonie@kernel.org>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        linux-arm-kernel@lists.infradead.org,
        Marek Szyprowski <m.szyprowski@samsung.com>
From:   Andrzej Hajda <a.hajda@samsung.com>
Message-ID: <e55a23bf-59bb-43c6-f7d7-467c282b8648@samsung.com>
Date:   Tue, 28 Jul 2020 17:05:03 +0200
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Hi Greg,

Apparently the patchset has no more comments.

Could you take the patches to your tree? At least 1st and 2nd.


Regards

Andrzej


On 13.07.2020 16:43, Andrzej Hajda wrote:
> Hi All,
>
> Thanks for comments.
>
> Changes since v8:
> - fixed typo in function name,
> - removed cocci script (added by mistake)
>
> Changes since v7:
> - improved commit message
> - added R-Bs
>
> Changes since v6:
> - removed leftovers from old naming scheme in commit descritions,
> - added R-Bs.
>
> Changes since v5:
> - removed patch adding macro, dev_err_probe(dev, PTR_ERR(ptr), ...) should be used instead,
> - added dev_dbg logging in case of -EPROBE_DEFER,
> - renamed functions and vars according to comments,
> - extended docs,
> - cosmetics.
>
> Original message (with small adjustments):
>
> Recently I took some time to re-check error handling in drivers probe code,
> and I have noticed that number of incorrect resource acquisition error handling
> increased and there are no other propositions which can cure the situation.
>
> So I have decided to resend my old proposition of probe_err helper which should
> simplify resource acquisition error handling, it also extend it with adding defer
> probe reason to devices_deferred debugfs property, which should improve debugging
> experience for developers/testers.
>
> I have also added two patches showing usage and benefits of the helper.
>
> My dirty/ad-hoc cocci scripts shows that this helper can be used in at least 2700 places
> saving about 3500 lines of code.
>
> Regards
> Andrzej
>
>
> Andrzej Hajda (4):
>    driver core: add device probe log helper
>    driver core: add deferring probe reason to devices_deferred property
>    drm/bridge/sii8620: fix resource acquisition error handling
>    drm/bridge: lvds-codec: simplify error handling
>
>   drivers/base/base.h                  |  3 ++
>   drivers/base/core.c                  | 46 ++++++++++++++++++++++++++++
>   drivers/base/dd.c                    | 23 +++++++++++++-
>   drivers/gpu/drm/bridge/lvds-codec.c  | 10 ++----
>   drivers/gpu/drm/bridge/sil-sii8620.c | 21 ++++++-------
>   include/linux/device.h               |  3 ++
>   6 files changed, 86 insertions(+), 20 deletions(-)
>