linux-kernel - [PATCH 4.9 114/191] media: dvb_frontend: Add unlocked_ioctl in dvb

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Date:   Mon, 29 Jun 2020 11:38:50 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jaedon Shin <jaedon.shin@...il.com>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 4.9 114/191] media: dvb_frontend: Add unlocked_ioctl in dvb_frontend.c

From: Jaedon Shin <jaedon.shin@...il.com>

commit a2282fd1fe2ebcda480426dbfaaa7c4e87e27399 upstream

Adds unlocked ioctl function directly in dvb_frontend.c instead of using
dvb_generic_ioctl().

Signed-off-by: Jaedon Shin <jaedon.shin@...il.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...pensource.com>
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/media/dvb-core/dvb_frontend.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c
index 6f9ee78a18703..dacc467e24af2 100644
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -1926,7 +1926,8 @@ static int dtv_property_process_set(struct dvb_frontend *fe,
 	return r;
 }
 
-static int dvb_frontend_ioctl(struct file *file, unsigned int cmd, void *parg)
+static int dvb_frontend_do_ioctl(struct file *file, unsigned int cmd,
+				 void *parg)
 {
 	struct dvb_device *dvbdev = file->private_data;
 	struct dvb_frontend *fe = dvbdev->priv;
@@ -1969,6 +1970,17 @@ static int dvb_frontend_ioctl(struct file *file, unsigned int cmd, void *parg)
 	return err;
 }
 
+static long dvb_frontend_ioctl(struct file *file, unsigned int cmd,
+			       unsigned long arg)
+{
+	struct dvb_device *dvbdev = file->private_data;
+
+	if (!dvbdev)
+		return -ENODEV;
+
+	return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl);
+}
+
 static int dtv_set_frontend(struct dvb_frontend *fe)
 {
 	struct dvb_frontend_private *fepriv = fe->frontend_priv;
@@ -2638,7 +2650,7 @@ static int dvb_frontend_release(struct inode *inode, struct file *file)
 
 static const struct file_operations dvb_frontend_fops = {
 	.owner		= THIS_MODULE,
-	.unlocked_ioctl	= dvb_generic_ioctl,
+	.unlocked_ioctl	= dvb_frontend_ioctl,
 	.poll		= dvb_frontend_poll,
 	.open		= dvb_frontend_open,
 	.release	= dvb_frontend_release,
@@ -2706,7 +2718,6 @@ int dvb_register_frontend(struct dvb_adapter* dvb,
 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
 		.name = fe->ops.info.name,
 #endif
-		.kernel_ioctl = dvb_frontend_ioctl
 	};
 
 	dev_dbg(dvb->device, "%s:\n", __func__);
-- 
2.25.1