linux-kernel - [PATCH v2 2/2] media: uvcvideo: Use dev_err_probe for devm_gpiod_get

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Message-Id: <20250303-uvc-eprobedefer-v2-2-be7c987cc3ca@chromium.org>
Date: Mon, 03 Mar 2025 19:07:09 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Hans de Goede <hdegoede@...hat.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>, 
 linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Ricardo Ribalda <ribalda@...omium.org>, 
 Doug Anderson <dianders@...omium.org>
Subject: [PATCH v2 2/2] media: uvcvideo: Use dev_err_probe for
 devm_gpiod_get_optional

Use the dev_err_probe() helper for devm_gpiod_get_optional(), like we do
with gpiod_to_irq()

That eventually calls device_set_deferred_probe_reason() which can be
helpful for tracking down problems.

Suggested-by: Doug Anderson <dianders@...omium.org>
Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
 drivers/media/usb/uvc/uvc_driver.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index e966bdb9239f..0094cfc092d6 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1297,8 +1297,13 @@ static int uvc_gpio_parse(struct uvc_device *dev)
 
 	gpio_privacy = devm_gpiod_get_optional(&dev->intf->dev, "privacy",
 					       GPIOD_IN);
-	if (IS_ERR_OR_NULL(gpio_privacy))
-		return PTR_ERR_OR_ZERO(gpio_privacy);
+	if (!gpio_privacy)
+		return 0;
+
+	if (IS_ERR(gpio_privacy))
+		return dev_err_probe(&dev->intf->dev,
+				     PTR_ERR(gpio_privacy),
+				     "Can't get privacy GPIO\n");
 
 	irq = gpiod_to_irq(gpio_privacy);
 	if (irq < 0)

-- 
2.48.1.711.g2feabab25a-goog