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39 lines
1.1 KiB
Diff
39 lines
1.1 KiB
Diff
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From 25ab75ec729423e9e230ef3fe027c275ab17addb Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Thu, 30 Apr 2020 09:52:50 +0100
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Subject: [PATCH] media: bcm2835-unicam: Fix reference counting in
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unicam_open
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The reference counting of node->open was only incremented after
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a check that the node was v4l2_fh_is_singular_file, which resulted
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in the counting going wrong and s_power not being called at an
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appropriate time.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/media/platform/bcm2835/bcm2835-unicam.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
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+++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
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@@ -2170,16 +2170,18 @@ static int unicam_open(struct file *file
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goto unlock;
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}
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+ node->open++;
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+
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if (!v4l2_fh_is_singular_file(file))
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goto unlock;
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ret = v4l2_subdev_call(dev->sensor, core, s_power, 1);
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if (ret < 0 && ret != -ENOIOCTLCMD) {
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v4l2_fh_release(file);
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+ node->open--;
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goto unlock;
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}
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- node->open++;
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ret = 0;
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unlock:
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