linux-kernel - [PATCH 0/3] gpio: mpc8xxx: Fix 3 errors related to the error handling path of the 'mpc8xxx

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Date:   Fri, 20 Aug 2021 17:37:44 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     linus.walleij@...aro.org, bgolaszewski@...libre.com,
        alexandru.marginean@....com, Laurentiu.Tudor@....com,
        hui.song_1@....com, andy.shevchenko@...il.com, ran.wang_1@....com
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 0/3] gpio: mpc8xxx: Fix 3 errors related to the error handling path of the 'mpc8xxx_probe()'

This has been split in 3 patches because:
  - the root issue of patch 1 and 3 is not the same commit as the one for patch 2.
  - the strategy to fix the issues is not the same
     - patch 1: add a new call in the rror handling path
     - patch 3: switch to a resource managed function

They could be merged together if easier to review. The subject would then be
something like "gpio: mpc8xxx: Fix the error handling path of 'mpc8xxx_probe()'"

If prefered, 'devm_add_action_or_reset()' could be used to switch the probe to
a fully managed resource function and remove the 'remove' function.
That's mostly a matter of taste.

If such an option is preferred, I'm a bit puzzled by the
'irq_set_chained_handler_and_data()' call in the remove function because I
don't see why it is there.
Also see the comment at the end of patch 1 also related to this function call.

Christophe JAILLET (3):
  gpio: mpc8xxx: Fix a resources leak in the error handling path of
    'mpc8xxx_probe()'
  gpio: mpc8xxx: Fix a potential double iounmap call in
    'mpc8xxx_probe()'
  gpio: mpc8xxx: Use 'devm_gpiochip_add_data()' to simplify the code and
    avoid a leak

 drivers/gpio/gpio-mpc8xxx.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

-- 
2.30.2