linux-kernel - [PATCH] fbdev: via: use new GPIO line value setter callbacks

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20250408-gpiochip-set-rv-video-v1-1-200ea4d24a29@linaro.org>
Date: Tue, 08 Apr 2025 09:42:56 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Florian Tobias Schandinat <FlorianSchandinat@....de>, 
 Helge Deller <deller@....de>, Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>
Cc: linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
 linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH] fbdev: via: use new GPIO line value setter callbacks

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
Commit 98ce1eb1fd87e ("gpiolib: introduce gpio_chip setters that return
values") added new line setter callbacks to struct gpio_chip. They allow
to indicate failures to callers. We're in the process of converting all
GPIO controllers to using them before removing the old ones.
---
 drivers/video/fbdev/via/via-gpio.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/video/fbdev/via/via-gpio.c b/drivers/video/fbdev/via/via-gpio.c
index 9577c2cd52c7..27226a8f3f42 100644
--- a/drivers/video/fbdev/via/via-gpio.c
+++ b/drivers/video/fbdev/via/via-gpio.c
@@ -81,8 +81,7 @@ struct viafb_gpio_cfg {
 /*
  * GPIO access functions
  */
-static void via_gpio_set(struct gpio_chip *chip, unsigned int nr,
-			 int value)
+static int via_gpio_set(struct gpio_chip *chip, unsigned int nr, int value)
 {
 	struct viafb_gpio_cfg *cfg = gpiochip_get_data(chip);
 	u8 reg;
@@ -99,13 +98,14 @@ static void via_gpio_set(struct gpio_chip *chip, unsigned int nr,
 		reg &= ~(0x10 << gpio->vg_mask_shift);
 	via_write_reg(VIASR, gpio->vg_port_index, reg);
 	spin_unlock_irqrestore(&cfg->vdev->reg_lock, flags);
+
+	return 0;
 }
 
 static int via_gpio_dir_out(struct gpio_chip *chip, unsigned int nr,
 			    int value)
 {
-	via_gpio_set(chip, nr, value);
-	return 0;
+	return via_gpio_set(chip, nr, value);
 }
 
 /*
@@ -146,7 +146,7 @@ static struct viafb_gpio_cfg viafb_gpio_config = {
 		.label = "VIAFB onboard GPIO",
 		.owner = THIS_MODULE,
 		.direction_output = via_gpio_dir_out,
-		.set = via_gpio_set,
+		.set_rv = via_gpio_set,
 		.direction_input = via_gpio_dir_input,
 		.get = via_gpio_get,
 		.base = -1,

---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20250331-gpiochip-set-rv-video-6bf1584aa770

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