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From:   Andrzej Hajda <a.hajda@samsung.com>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     Andrzej Hajda <a.hajda@samsung.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        linux-kernel@vger.kernel.org,
        Javier Martinez Canillas <javierm@redhat.com>,
        linux-arm-kernel@lists.infradead.org, andy.shevchenko@gmail.com,
        Mark Brown <broonie@kernel.org>,
        Russell King - ARM Linux <linux@armlinux.org.uk>
Subject: [PATCH v4 0/3] driver core: add probe error check helper
Date:   Thu, 20 Dec 2018 11:22:44 +0100
Message-id: <20181220102247.4911-1-a.hajda@samsung.com>
CMS-TYPE: 201P
References: <CGME20181220102258eucas1p1ca5abb0b48d1f13d9234a4a7702a13da@eucas1p1.samsung.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi Greg, Rafael,

This patchset proposes probe helper function which should simplify little bit
resource acquisition error handling, it also extend it with adding defer probe
reason to devices_deferred property:

This patchset is actually resend of the most important 1st and 2nd patch.

I have also attached patch adding probe_err_ptr - it will allow to replace
quite frequent calls:
    probe_err(dev, PTR_ERR(ptr), ...)
with
    probe_err_ptr(dev, ptr, ...)

I have dropped the last patch showing usage of probe_err(_ptr)? as it is
very big, should be split per subsystem, and should be applied after merge
of patches introducing probe_err(_ptr) helpers.

Just for the record - my dirty cocci script generates patch which replaces
code with probe_err* helpers with following stats (on linux_next branch):
   1585 probe_err
   1194 probe_err_ptr
   1638 files changed, 6487 insertions(+), 9163 deletions(-).
Of course there are much more places where probe_err* can be applied, the script
tries to catch the most obvious ones.
More importantly probe_err should handle probe errors more correctly
and uniformly than it is done now.

If this patchset will be accepted I will try to send patches introducing probe_err*
per subsystem.

Regards
Andrzej


Andrzej Hajda (3):
  driver core: add probe_err log helper
  driver core: add deferring probe reason to devices_deferred property
  driver core: add probe_err_ptr helper

 drivers/base/base.h    |  3 +++
 drivers/base/core.c    | 40 ++++++++++++++++++++++++++++++++++++++++
 drivers/base/dd.c      | 21 ++++++++++++++++++++-
 include/linux/device.h |  5 +++++
 4 files changed, 68 insertions(+), 1 deletion(-)

-- 
2.17.1