linux-kernel - [PATCH stable 4.9 18/21] media: dvb_frontend: Add compat

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Message-Id: <20200605162518.28099-19-florian.fainelli@broadcom.com>
Date:   Fri,  5 Jun 2020 09:25:15 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     stable@...r.kernel.org, Jaedon Shin <jaedon.shin@...il.com>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Michael Krufky <mkrufky@...uxtv.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Shuah Khan <shuah@...nel.org>,
        Colin Ian King <colin.king@...onical.com>,
        Katsuhiro Suzuki <suzuki.katsuhiro@...ionext.com>,
        Satendra Singh Thakur <satendra.t@...sung.com>,
        linux-media@...r.kernel.org (open list:MEDIA INPUT INFRASTRUCTURE
        (V4L/DVB)),
        linux-fsdevel@...r.kernel.org (open list:FILESYSTEMS (VFS and
        infrastructure))
Subject: [PATCH stable 4.9 18/21] media: dvb_frontend: Add compat_ioctl callback

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

commit c2dfd2276cec63a0c6f6ce18ed83800d96fde542 upstream

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

[m.chehab@....samsung.com: add missing include compat.h]
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>
---
 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