V4L/DVB (9576): cx88-dvb: MFE attachment clean-up for HVR-3000/4000

This cleans-up MFE attachment for these cards plus
two cases of potential memory leak on attachment
failure.
Signed-off-by: Darron Broad <darron@kewl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx88/cx88-dvb.c

@@ -606,7 +606,7 @@ static int dvb_register(struct cx8802_dev *dev)
 	/* Get the first frontend */
 	fe0 = videobuf_dvb_get_frontend(&dev->frontends, 1);
 	if (!fe0)
-		return -EINVAL;
+		goto frontend_detach;
 
 	/* multi-frontend gate control is undefined or defaults to fe0 */
 	dev->frontends.gate = 0;
@@ -653,38 +653,35 @@ static int dvb_register(struct cx8802_dev *dev)
 		}
 		break;
 	case CX88_BOARD_HAUPPAUGE_HVR3000:
+		/* MFE frontend 1 */
+		mfe_shared = 1;
+		dev->frontends.gate = 2;
 		/* DVB-S init */
 		fe0->dvb.frontend = dvb_attach(cx24123_attach,
 					&hauppauge_novas_config,
 					&dev->core->i2c_adap);
 		if (fe0->dvb.frontend) {
-			if (!dvb_attach(isl6421_attach, fe0->dvb.frontend,
-			&dev->core->i2c_adap, 0x08, ISL6421_DCL, 0x00)) {
-				dprintk( 1, "%s(): HVR3000 - DVB-S LNB Init: failed\n", __func__);
-			}
-		} else {
-			dprintk( 1, "%s(): HVR3000 - DVB-S Init: failed\n", __func__);
+			if (!dvb_attach(isl6421_attach,
+					fe0->dvb.frontend,
+					&dev->core->i2c_adap,
+					0x08, ISL6421_DCL, 0x00))
+				goto frontend_detach;
 		}
-		/* DVB-T init */
+		/* MFE frontend 2 */
 		fe1 = videobuf_dvb_get_frontend(&dev->frontends, 2);
-		if (fe1) {
-			dev->frontends.gate = 2;
-			mfe_shared = 1;
+		if (!fe1)
+			goto frontend_detach;
+		/* DVB-T init */
 		fe1->dvb.frontend = dvb_attach(cx22702_attach,
 					&hauppauge_hvr_config,
 					&dev->core->i2c_adap);
 		if (fe1->dvb.frontend) {
 			fe1->dvb.frontend->id = 1;
-				if(!dvb_attach(simple_tuner_attach, fe1->dvb.frontend,
-						&dev->core->i2c_adap, 0x61,
-						TUNER_PHILIPS_FMD1216ME_MK3)) {
-					dprintk( 1, "%s(): HVR3000 - DVB-T misc Init: failed\n", __func__);
-				}
-			} else {
-				dprintk( 1, "%s(): HVR3000 - DVB-T Init: failed\n", __func__);
-			}
-		} else {
-			dprintk( 1, "%s(): HVR3000 - DVB-T Init: can't find frontend 2.\n", __func__);
+			if (!dvb_attach(simple_tuner_attach,
+					fe1->dvb.frontend,
+					&dev->core->i2c_adap,
+					0x61, TUNER_PHILIPS_FMD1216ME_MK3))
+				goto frontend_detach;
 		}
 		break;
 	case CX88_BOARD_DVICO_FUSIONHDTV_DVB_T_PLUS:
@@ -998,38 +995,35 @@ static int dvb_register(struct cx8802_dev *dev)
 		}
 		break;
 	case CX88_BOARD_HAUPPAUGE_HVR4000:
+		/* MFE frontend 1 */
+		mfe_shared = 1;
+		dev->frontends.gate = 2;
 		/* DVB-S/S2 Init */
 		fe0->dvb.frontend = dvb_attach(cx24116_attach,
 					&hauppauge_hvr4000_config,
 					&dev->core->i2c_adap);
 		if (fe0->dvb.frontend) {
-			if(!dvb_attach(isl6421_attach, fe0->dvb.frontend,
-				&dev->core->i2c_adap, 0x08, ISL6421_DCL, 0x00)) {
-				dprintk( 1, "%s(): HVR4000 - DVB-S LNB Init: failed\n", __func__);
-			}
-		} else {
-			dprintk( 1, "%s(): HVR4000 - DVB-S Init: failed\n", __func__);
+			if (!dvb_attach(isl6421_attach,
+					fe0->dvb.frontend,
+					&dev->core->i2c_adap,
+					0x08, ISL6421_DCL, 0x00))
+				goto frontend_detach;
 		}
-		/* DVB-T Init */
+		/* MFE frontend 2 */
 		fe1 = videobuf_dvb_get_frontend(&dev->frontends, 2);
-		if (fe1) {
-			dev->frontends.gate = 2;
-			mfe_shared = 1;
+		if (!fe1)
+			goto frontend_detach;
+		/* DVB-T Init */
 		fe1->dvb.frontend = dvb_attach(cx22702_attach,
 					&hauppauge_hvr_config,
 					&dev->core->i2c_adap);
 		if (fe1->dvb.frontend) {
 			fe1->dvb.frontend->id = 1;
-				if(!dvb_attach(simple_tuner_attach, fe1->dvb.frontend,
-					&dev->core->i2c_adap, 0x61,
-					TUNER_PHILIPS_FMD1216ME_MK3)) {
-					dprintk( 1, "%s(): HVR4000 - DVB-T misc Init: failed\n", __func__);
-				}
-			} else {
-				dprintk( 1, "%s(): HVR4000 - DVB-T Init: failed\n", __func__);
-			}
-		} else {
-			dprintk( 1, "%s(): HVR4000 - DVB-T Init: can't find frontend 2.\n", __func__);
+			if (!dvb_attach(simple_tuner_attach,
+					fe1->dvb.frontend,
+					&dev->core->i2c_adap,
+					0x61, TUNER_PHILIPS_FMD1216ME_MK3))
+				goto frontend_detach;
 		}
 		break;
 	case CX88_BOARD_HAUPPAUGE_HVR4000LITE:
@@ -1037,9 +1031,11 @@ static int dvb_register(struct cx8802_dev *dev)
 					&hauppauge_hvr4000_config,
 					&dev->core->i2c_adap);
 		if (fe0->dvb.frontend) {
-			dvb_attach(isl6421_attach, fe0->dvb.frontend,
+			if (!dvb_attach(isl6421_attach,
+					fe0->dvb.frontend,
 					&dev->core->i2c_adap,
-				0x08, ISL6421_DCL, 0x00);
+					0x08, ISL6421_DCL, 0x00))
+				goto frontend_detach;
 		}
 		break;
 	case CX88_BOARD_PROF_6200:
@@ -1095,7 +1091,7 @@ static int dvb_register(struct cx8802_dev *dev)
 		printk(KERN_ERR
 		       "%s/2: frontend initialization failed\n",
 		       core->name);
-		return -EINVAL;
+		goto frontend_detach;
 	}
 	/* define general-purpose callback pointer */
 	fe0->dvb.frontend->callback = cx88_tuner_callback;