From: Andrzej Hajda <a.hajda@samsung.com>
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>,
Andrzej Hajda <a.hajda@samsung.com>,
andy.shevchenko@gmail.com, Mark Brown <broonie@kernel.org>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Daniel Vetter <daniel@ffwll.ch>,
linux-arm-kernel@lists.infradead.org,
Marek Szyprowski <m.szyprowski@samsung.com>
Subject: [PATCH v7 0/4] driver core: add probe error check helper
Date: Mon, 29 Jun 2020 13:22:38 +0200 [thread overview]
Message-ID: <20200629112242.18380-1-a.hajda@samsung.com> (raw)
In-Reply-To: CGME20200629112247eucas1p2f5a1c0a4ffe3a2571658646a7b369cfd@eucas1p2.samsung.com
Hi All,
Thanks for comments.
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(-)
--
2.17.1
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next parent reply other threads:[~2020-06-29 11:24 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20200629112247eucas1p2f5a1c0a4ffe3a2571658646a7b369cfd@eucas1p2.samsung.com>
2020-06-29 11:22 ` Andrzej Hajda [this message]
[not found] ` <CGME20200629112248eucas1p187e5dac2f4f6120aacbc86e48ad0fff9@eucas1p1.samsung.com>
2020-06-29 11:22 ` [PATCH v7 1/4] driver core: add device probe log helper Andrzej Hajda
2020-06-29 16:38 ` Andy Shevchenko
[not found] ` <CGME20200702134434eucas1p233a3f66f5bdb4b97f4f49d2d43d45297@eucas1p2.samsung.com>
2020-07-02 13:44 ` [PATCH v8 2/5] driver core: add deferring probe reason to devices_deferred property Andrzej Hajda
2020-07-10 13:31 ` Greg Kroah-Hartman
2020-07-10 15:25 ` Andrzej Hajda
2020-06-30 15:35 ` [PATCH v7 1/4] driver core: add device probe log helper Mark Brown
[not found] ` <CGME20200629112249eucas1p160b845444f8fbad96bdec41e9d3938da@eucas1p1.samsung.com>
2020-06-29 11:22 ` [PATCH v7 2/4] driver core: add deferring probe reason to devices_deferred property Andrzej Hajda
2020-06-29 16:36 ` Andy Shevchenko
2020-06-30 8:32 ` Andrzej Hajda
2020-06-30 10:00 ` Andy Shevchenko
[not found] ` <CGME20200629112249eucas1p12fc95f88729c12c78b1a5bfe32afad8f@eucas1p1.samsung.com>
2020-06-29 11:22 ` [PATCH v7 3/4] drm/bridge/sii8620: fix resource acquisition error handling Andrzej Hajda
[not found] ` <CGME20200629112250eucas1p162ce47eab8946c45357a7e2c03a6da9a@eucas1p1.samsung.com>
2020-06-29 11:22 ` [PATCH v7 4/4] drm/bridge: lvds-codec: simplify " Andrzej Hajda
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