>>From ce418a935a3439b68273550dea6caf3a7a820e8f Mon Sep 17 00:00:00 2001
From: Manu Abraham <manu@linuxtv.org>
Date: Thu, 4 Sep 2008 14:58:55 +0200
Subject: [PATCH] DVB Support DVBFE_SET_DELSYS backward compatibility

Make DVBFE_SET_DELSYS backward compatible

From: Reinhard Nissl <rnissl@gmx.de>
Signed-off-by: Reinhard Nissl <rnissl@gmx.de>
Signed-off-by: Manu Abraham <manu@linuxtv.org>

diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c
index 3a49876..a8005ef 100644
--- a/drivers/media/dvb/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb/dvb-core/dvb_frontend.c
@@ -1854,6 +1854,24 @@ static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
 		if (fe->ops.set_delsys) {
 			fe->ops.set_delsys(fe, fepriv->delsys);
 			err = 0;
+		} else {
+			err = 0;
+			switch (fe->ops.info.type) {
+				case FE_QPSK:
+					if (fepriv->delsys != DVBFE_DELSYS_DVBS)
+						err = -EINVAL;
+					break;
+				case FE_QAM:
+					if (fepriv->delsys != DVBFE_DELSYS_DVBC)
+						err = -EINVAL;
+					break;
+				case FE_OFDM:
+					if (fepriv->delsys != DVBFE_DELSYS_DVBT)
+						err = -EINVAL;
+					break;
+				default:
+					err = -EINVAL;
+			}
 		}
 		break;
 	case DVBFE_GET_INFO: