From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from vps.xff.cz (vps.xff.cz [195.181.215.36]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BD33172 for ; Wed, 8 Sep 2021 11:02:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megous.com; s=mail; t=1631098575; bh=YY2yCPD5vLXF6o1p4UODyyT1QmHGm6Y/SxZTq/D9uMg=; h=From:To:Cc:Subject:Date:From; b=mYaLZngkt2nB4yE41SBYtnk11sdtwCw7txgKGBz2Q/2CJ0HBC+vnJHdMdqkqjJQiM gQYiAehdspatbT9xsNwpwxOThXCXQztBA4qx3XaJn7L5n3/C/tXVPC5dbwh2QY+ulA kJa/bp4QvEvzzF8d4CSUdarF7Ni73Q03Xmt7Iyio= From: Ondrej Jirman To: Yong Deng , Mauro Carvalho Chehab , Maxime Ripard , Chen-Yu Tsai , Jernej Skrabec , 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 Subject: [PATCH] media: sun6i-csi: Allow the video device to be open multiple times Date: Wed, 8 Sep 2021 12:56:09 +0200 Message-Id: <20210908105609.1823449-1-megous@megous.com> Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- 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