linux-kernel - [PATCH 0/2] gpio: fix NULL-pointer dereferences introduced in GPIO chip setter conversion

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Message-Id: <20250618-gpio-mmio-fix-setter-v1-0-2578ffb77019@linaro.org>
Date: Wed, 18 Jun 2025 15:02:05 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Klara Modin <klarasmodin@...il.com>, 
 Avi Fishman <avifishman70@...il.com>, Tomer Maimon <tmaimon77@...il.com>, 
 Tali Perry <tali.perry1@...il.com>, Patrick Venture <venture@...gle.com>, 
 Nancy Yuen <yuenn@...gle.com>, Benjamin Fair <benjaminfair@...gle.com>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>
Cc: openbmc@...ts.ozlabs.org, linux-gpio@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 0/2] gpio: fix NULL-pointer dereferences introduced in GPIO
 chip setter conversion

I should have paid more attention when doing the GPIO chip setter
conversions that there are instances where the setters are accessed
directly using the function pointers in struct gpio_chip.

This is not optimal and I am making a mental note to track all such
use-cases and use the appropriate wrapper instead. For now: let's just
fix the issue in gpio-mmio and its users as well as one other converted
driver that suffers from it.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
Bartosz Golaszewski (2):
      gpio: npcm-sgpio: don't use legacy GPIO chip setters
      gpio: mmio: don't use legacy GPIO chip setters

 drivers/gpio/gpio-74xx-mmio.c  | 2 +-
 drivers/gpio/gpio-en7523.c     | 2 +-
 drivers/gpio/gpio-mmio.c       | 6 +++---
 drivers/gpio/gpio-npcm-sgpio.c | 4 +---
 4 files changed, 6 insertions(+), 8 deletions(-)
---
base-commit: 7b20980ffc11514d8849811857d915001236bcfa
change-id: 20250618-gpio-mmio-fix-setter-ddd4dd7a03eb

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@...aro.org>