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Wed, 18 Jun 2025 06:02:12 -0700 (PDT) From: Bartosz Golaszewski Date: Wed, 18 Jun 2025 15:02:06 +0200 Subject: [PATCH 1/2] gpio: npcm-sgpio: don't use legacy GPIO chip setters Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250618-gpio-mmio-fix-setter-v1-1-2578ffb77019@linaro.org> References: <20250618-gpio-mmio-fix-setter-v1-0-2578ffb77019@linaro.org> In-Reply-To: <20250618-gpio-mmio-fix-setter-v1-0-2578ffb77019@linaro.org> To: Klara Modin , Avi Fishman , Tomer Maimon , Tali Perry , Patrick Venture , Nancy Yuen , Benjamin Fair , Linus Walleij , Bartosz Golaszewski Cc: openbmc@lists.ozlabs.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Bartosz Golaszewski X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1140; i=bartosz.golaszewski@linaro.org; h=from:subject:message-id; bh=XVDbA11npYNtBXGkYX9hOCC8ch1woMEIFMQDtO/pLz4=; 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This will lead to a NULL-pointer dereference as this pointer is no longer populated. Fix it. Fixes: 0e1a8930c941 ("gpio: npcm-sgpio: use new GPIO line value setter call= backs") Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpio-npcm-sgpio.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/gpio/gpio-npcm-sgpio.c b/drivers/gpio/gpio-npcm-sgpio.c index b3953d1ae8af45f4bce9b799434547cd8770d9df..25b203a89e380366e6a1dcd5177= 5f6b1997a1d30 100644 --- a/drivers/gpio/gpio-npcm-sgpio.c +++ b/drivers/gpio/gpio-npcm-sgpio.c @@ -211,9 +211,7 @@ static int npcm_sgpio_dir_in(struct gpio_chip *gc, unsi= gned int offset) =20 static int npcm_sgpio_dir_out(struct gpio_chip *gc, unsigned int offset, i= nt val) { - gc->set(gc, offset, val); - - return 0; + return gc->set_rv(gc, offset, val); } =20 static int npcm_sgpio_get_direction(struct gpio_chip *gc, unsigned int off= set) --=20 2.48.1 From nobody Thu Oct 9 09:03:17 2025 Received: from mail-wr1-f49.google.com (mail-wr1-f49.google.com [209.85.221.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6E87A2E8880 for ; 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a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 From: Bartosz Golaszewski We've converted this driver to using the new GPIO line value setters but missed the instances where the legacy callback is accessed directly using the function pointer. This will lead to a NULL-pointer dereference as this pointer is no longer populated. The issue needs fixing locally as well as in the already converted previously users of gpio-mmio. Fixes: b908d35d0003 ("gpio: mmio: use new GPIO line value setter callbacks") Reported-by: Klara Modin Closes: https://lore.kernel.org/all/2rw2sncevdiyirpdovotztlg77apcq2btzytuv5= jnm55aqhlne@swtts3hl53tw/ Signed-off-by: Bartosz Golaszewski Tested-by: Klara Modin Tested-by: Mark Brown --- drivers/gpio/gpio-74xx-mmio.c | 2 +- drivers/gpio/gpio-en7523.c | 2 +- drivers/gpio/gpio-mmio.c | 6 +++--- 3 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/gpio/gpio-74xx-mmio.c b/drivers/gpio/gpio-74xx-mmio.c index c7ac5a9ffb1fd1cc9439e3320d54574bf0cebbf6..3ba21add3a1c669171578ceaf9c= c1728c060d401 100644 --- a/drivers/gpio/gpio-74xx-mmio.c +++ b/drivers/gpio/gpio-74xx-mmio.c @@ -100,7 +100,7 @@ static int mmio_74xx_dir_out(struct gpio_chip *gc, unsi= gned int gpio, int val) struct mmio_74xx_gpio_priv *priv =3D gpiochip_get_data(gc); =20 if (priv->flags & MMIO_74XX_DIR_OUT) { - gc->set(gc, gpio, val); + gc->set_rv(gc, gpio, val); return 0; } =20 diff --git a/drivers/gpio/gpio-en7523.c b/drivers/gpio/gpio-en7523.c index 69834db2c1cf26be379c0deca38dda889202f706..c08069d0d1045e9df4a76cad460= 0bf25d4e3a7c5 100644 --- a/drivers/gpio/gpio-en7523.c +++ b/drivers/gpio/gpio-en7523.c @@ -50,7 +50,7 @@ static int airoha_dir_set(struct gpio_chip *gc, unsigned = int gpio, iowrite32(dir, ctrl->dir[gpio / 16]); =20 if (out) - gc->set(gc, gpio, val); + gc->set_rv(gc, gpio, val); =20 iowrite32(output, ctrl->output); =20 diff --git a/drivers/gpio/gpio-mmio.c b/drivers/gpio/gpio-mmio.c index 9169eccadb238efe944d494054b1e009f16eee7f..57622f45d33e0695f97c7e0fa40= e64f9fd5df1e0 100644 --- a/drivers/gpio/gpio-mmio.c +++ b/drivers/gpio/gpio-mmio.c @@ -362,7 +362,7 @@ static int bgpio_dir_out_err(struct gpio_chip *gc, unsi= gned int gpio, static int bgpio_simple_dir_out(struct gpio_chip *gc, unsigned int gpio, int val) { - gc->set(gc, gpio, val); + gc->set_rv(gc, gpio, val); =20 return bgpio_dir_return(gc, gpio, true); } @@ -427,14 +427,14 @@ static int bgpio_dir_out_dir_first(struct gpio_chip *= gc, unsigned int gpio, int val) { bgpio_dir_out(gc, gpio, val); - gc->set(gc, gpio, val); + gc->set_rv(gc, gpio, val); return bgpio_dir_return(gc, gpio, true); } =20 static int bgpio_dir_out_val_first(struct gpio_chip *gc, unsigned int gpio, int val) { - gc->set(gc, gpio, val); + gc->set_rv(gc, gpio, val); bgpio_dir_out(gc, gpio, val); return bgpio_dir_return(gc, gpio, true); } --=20 2.48.1