linux-kernel - [PATCH 1/1] media: v4l: Don't turn on privacy LED if streamon fails

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Message-Id: <20240410100301.658824-1-sakari.ailus@linux.intel.com>
Date: Wed, 10 Apr 2024 13:03:01 +0300
From: Sakari Ailus <sakari.ailus@...ux.intel.com>
To: linux-media@...r.kernel.org
Cc: tomi.valkeinen@...asonboard.com,
	Hans de Goede <hdegoede@...hat.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans Verkuil <hverkuil@...all.nl>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Umang Jain <umang.jain@...asonboard.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] media: v4l: Don't turn on privacy LED if streamon fails

Turn on the privacy LED only if streamon succeeds. This can be done after
enabling streaming on the sensor.

Fixes: b6e10ff6c23d ("media: v4l2-core: Make the v4l2-core code enable/disable the privacy LED if present")
Signed-off-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
---
 drivers/media/v4l2-core/v4l2-subdev.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 4c6198c48dd6..acb7c3003ab6 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -412,15 +412,6 @@ static int call_s_stream(struct v4l2_subdev *sd, int enable)
 	if (WARN_ON(!!sd->enabled_streams == !!enable))
 		return 0;
 
-#if IS_REACHABLE(CONFIG_LEDS_CLASS)
-	if (!IS_ERR_OR_NULL(sd->privacy_led)) {
-		if (enable)
-			led_set_brightness(sd->privacy_led,
-					   sd->privacy_led->max_brightness);
-		else
-			led_set_brightness(sd->privacy_led, 0);
-	}
-#endif
 	ret = sd->ops->video->s_stream(sd, enable);
 
 	if (!enable && ret < 0) {
@@ -431,6 +422,16 @@ static int call_s_stream(struct v4l2_subdev *sd, int enable)
 	if (!ret)
 		sd->enabled_streams = enable ? BIT(0) : 0;
 
+#if IS_REACHABLE(CONFIG_LEDS_CLASS)
+	if (!IS_ERR_OR_NULL(sd->privacy_led) && !(enable && ret < 0)) {
+		if (enable)
+			led_set_brightness(sd->privacy_led,
+					   sd->privacy_led->max_brightness);
+		else
+			led_set_brightness(sd->privacy_led, 0);
+	}
+#endif
+
 	return ret;
 }
 
-- 
2.39.2