From 8ed852834683ebe064157e069af8dfb41cad6403 Mon Sep 17 00:00:00 2001
From: Ondrej Jirman <megous@megous.com>
Date: Wed, 8 Sep 2021 12:56:09 +0200
Subject: [PATCH] media: sun6i-csi: Allow the video device to be open multiple times
Git-commit: 8ed852834683ebe064157e069af8dfb41cad6403
Patch-mainline: v5.16-rc1
References: git-fixes stable-5.14.19
Previously it was possible, but a recent fix for uninitialized
`ret` variable broke this behavior.
v4l2_fh_is_singular_file() check is there just to determine
whether the power needs to be enabled, and it's not a failure
if it returns false.
Fixes: ba9139116bc0 ("media: sun6i-csi: add a missing return code")
Signed-off-by: Ondrej Jirman <megous@megous.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c
index 33459892c1a9..607a8d39fbe2 100644
--- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c
+++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c
@@ -467,7 +467,7 @@ static const struct v4l2_ioctl_ops sun6i_video_ioctl_ops = {
static int sun6i_video_open(struct file *file)
{
struct sun6i_video *video = video_drvdata(file);
- int ret;
+ int ret = 0;
if (mutex_lock_interruptible(&video->lock))
return -ERESTARTSYS;
@@ -481,10 +481,8 @@ static int sun6i_video_open(struct file *file)
goto fh_release;
/* check if already powered */
- if (!v4l2_fh_is_singular_file(file)) {
- ret = -EBUSY;
+ if (!v4l2_fh_is_singular_file(file))
goto unlock;
- }
ret = sun6i_csi_set_power(video->csi, true);
if (ret < 0)
--
2.26.2