[PATCH 4.9 115/191] media: dvb_frontend: Add compat_ioctl callback

Sasha Levin
2020-06-29T19:27:31Z

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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 dacc467e24af2..c0a25cd6ccb8b 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 02ac9067a3542..9fa3285425fef 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)
--
2.25.1