[PATCH stable 4.9 18/21] media: dvb_frontend: Add compat_ioctl callback

From: Florian Fainelli <f.fainelli@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org, Jaedon Shin <jaedon.shin@gmail.com>,
	Mauro Carvalho Chehab <mchehab@s-opensource.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Michael Krufky <mkrufky@linuxtv.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Shuah Khan <shuah@kernel.org>,
	Colin Ian King <colin.king@canonical.com>,
	Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>,
	Satendra Singh Thakur <satendra.t@samsung.com>,
	linux-media@vger.kernel.org (open list:MEDIA INPUT
	INFRASTRUCTURE (V4L/DVB)),
	linux-fsdevel@vger.kernel.org (open list:FILESYSTEMS (VFS and
	infrastructure))
Subject: [PATCH stable 4.9 18/21] media: dvb_frontend: Add compat_ioctl callback
Date: Fri,  5 Jun 2020 09:25:15 -0700	[thread overview]
Message-ID: <20200605162518.28099-19-florian.fainelli@broadcom.com> (raw)
In-Reply-To: <20200605162518.28099-1-florian.fainelli@broadcom.com>

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

commit c2dfd2276cec63a0c6f6ce18ed83800d96fde542 upstream

Adds compat_ioctl for 32-bit user space applications on a 64-bit system.

[m.chehab@osg.samsung.com: add missing include compat.h]
Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/media/dvb-core/dvb_frontend.c | 12 ++++++++++++
 fs/compat_ioctl.c                     | 17 -----------------
 2 files changed, 12 insertions(+), 17 deletions(-)

diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c
index dacc467e24af..c0a25cd6ccb8 100644
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -41,6 +41,7 @@
 #include <linux/jiffies.h>
 #include <linux/kthread.h>
 #include <linux/ktime.h>
+#include <linux/compat.h>
 #include <asm/processor.h>
 
 #include "dvb_frontend.h"
@@ -1981,6 +1982,14 @@ static long dvb_frontend_ioctl(struct file *file, unsigned int cmd,
 	return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl);
 }
 
+#ifdef CONFIG_COMPAT
+static long dvb_frontend_compat_ioctl(struct file *file, unsigned int cmd,
+				      unsigned long arg)
+{
+	return dvb_frontend_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
 static int dtv_set_frontend(struct dvb_frontend *fe)
 {
 	struct dvb_frontend_private *fepriv = fe->frontend_priv;
@@ -2651,6 +2660,9 @@ 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_frontend_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= dvb_frontend_compat_ioctl,
+#endif
 	.poll		= dvb_frontend_poll,
 	.open		= dvb_frontend_open,
 	.release	= dvb_frontend_release,
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 02ac9067a354..9fa3285425fe 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -1340,23 +1340,6 @@ COMPATIBLE_IOCTL(DMX_GET_PES_PIDS)
 COMPATIBLE_IOCTL(DMX_GET_CAPS)
 COMPATIBLE_IOCTL(DMX_SET_SOURCE)
 COMPATIBLE_IOCTL(DMX_GET_STC)
-COMPATIBLE_IOCTL(FE_GET_INFO)
-COMPATIBLE_IOCTL(FE_DISEQC_RESET_OVERLOAD)
-COMPATIBLE_IOCTL(FE_DISEQC_SEND_MASTER_CMD)
-COMPATIBLE_IOCTL(FE_DISEQC_RECV_SLAVE_REPLY)
-COMPATIBLE_IOCTL(FE_DISEQC_SEND_BURST)
-COMPATIBLE_IOCTL(FE_SET_TONE)
-COMPATIBLE_IOCTL(FE_SET_VOLTAGE)
-COMPATIBLE_IOCTL(FE_ENABLE_HIGH_LNB_VOLTAGE)
-COMPATIBLE_IOCTL(FE_READ_STATUS)
-COMPATIBLE_IOCTL(FE_READ_BER)
-COMPATIBLE_IOCTL(FE_READ_SIGNAL_STRENGTH)
-COMPATIBLE_IOCTL(FE_READ_SNR)
-COMPATIBLE_IOCTL(FE_READ_UNCORRECTED_BLOCKS)
-COMPATIBLE_IOCTL(FE_SET_FRONTEND)
-COMPATIBLE_IOCTL(FE_GET_FRONTEND)
-COMPATIBLE_IOCTL(FE_GET_EVENT)
-COMPATIBLE_IOCTL(FE_DISHNETWORK_SEND_LEGACY_CMD)
 COMPATIBLE_IOCTL(VIDEO_STOP)
 COMPATIBLE_IOCTL(VIDEO_PLAY)
 COMPATIBLE_IOCTL(VIDEO_FREEZE)
-- 
2.17.1

