From: Ondrej Jirman <megous@megous.com>
To: Yong Deng <yong.deng@magewell.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
linux-media@vger.kernel.org (open list:CSI DRIVERS FOR ALLWINNER
V3s),
linux-arm-kernel@lists.infradead.org (moderated
list:ARM/Allwinner sunXi SoC support),
linux-sunxi@lists.linux.dev (open list:ARM/Allwinner sunXi SoC
support), linux-kernel@vger.kernel.org (open list)
Cc: Ondrej Jirman <megous@megous.com>
Subject: [PATCH] media: sun6i-csi: Allow the video device to be open multiple times
Date: Wed, 8 Sep 2021 12:56:09 +0200 [thread overview]
Message-ID: <20210908105609.1823449-1-megous@megous.com> (raw)
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: ba9139116bc0538 ("media: sun6i-csi: add a missing return code")
Signed-off-by: Ondrej Jirman <megous@megous.com>
---
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 0129dee798b4..da1f8b2852b7 100644
--- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c
+++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c
@@ -510,7 +510,7 @@ 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;
@@ -524,10 +524,8 @@ 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)
--
2.33.0
next reply other threads:[~2021-09-08 11:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-08 10:56 Ondrej Jirman [this message]
2021-09-08 18:24 ` [PATCH] media: sun6i-csi: Allow the video device to be open multiple times Jernej Škrabec
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210908105609.1823449-1-megous@megous.com \
--to=megous@megous.com \
--cc=jernej.skrabec@gmail.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=linux-sunxi@lists.linux.dev \
--cc=mchehab@kernel.org \
--cc=mripard@kernel.org \
--cc=wens@csie.org \
--cc=yong.deng@magewell.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).