[media] ngene: Clean-up driver initialisation (part 1)

If tuner initialisation failed, the frontend node was not removed.
When the frontend was opened, a kernel oops occurred...

This is the first step to improve error handling during initialisation.

Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/dvb/ngene/ngene-cards.c b/drivers/media/dvb/ngene/ngene-cards.c
index 5e6b85c..fc93d10 100644 (file)
--- a/drivers/media/dvb/ngene/ngene-cards.c
+++ b/drivers/media/dvb/ngene/ngene-cards.c
@@ -113,6 +113,7 @@ static int demod_attach_stv0900(struct ngene_channel *chan)
                        0, chan->dev->card_info->lnb[chan->number])) {
                printk(KERN_ERR DEVICE_NAME ": No LNBH24 found!\n");
                dvb_frontend_detach(chan->fe);
+               chan->fe = NULL;
                return -ENODEV;
        }
 

diff --git a/drivers/media/dvb/ngene/ngene-core.c b/drivers/media/dvb/ngene/ngene-core.c
index 8764647..831b758 100644 (file)
--- a/drivers/media/dvb/ngene/ngene-core.c
+++ b/drivers/media/dvb/ngene/ngene-core.c
@@ -1482,23 +1482,32 @@ static int init_channel(struct ngene_channel *chan)
 
        if (io & NGENE_IO_TSIN) {
                chan->fe = NULL;
-               if (ni->demod_attach[nr])
-                       ni->demod_attach[nr](chan);
+               if (ni->demod_attach[nr]) {
+                       ret = ni->demod_attach[nr](chan);
+                       if (ret < 0)
+                               goto err_fe;
+               }
+               if (chan->fe && ni->tuner_attach[nr]) {
+                       ret = ni->tuner_attach[nr](chan);
+                       if (ret < 0)
+                               goto err_fe;
+               }
                if (chan->fe) {
-                       if (dvb_register_frontend(adapter, chan->fe) < 0) {
-                               if (chan->fe->ops.release)
-                                       chan->fe->ops.release(chan->fe);
-                               chan->fe = NULL;
-                       }
+                       if (dvb_register_frontend(adapter, chan->fe) < 0)
+                               goto err_fe;
                }
-               if (chan->fe && ni->tuner_attach[nr])
-                       if (ni->tuner_attach[nr] (chan) < 0) {
-                               printk(KERN_ERR DEVICE_NAME
-                                      ": Tuner attach failed on channel %d!\n",
-                                      nr);
-                       }
        }
        return ret;
+
+err_fe:
+       if (chan->fe) {
+               dvb_frontend_detach(chan->fe);
+               chan->fe = NULL;
+       }
+/*     FIXME: this causes an oops... */
+/*     release_channel(chan);        */
+/*     return ret;                   */
+       return 0;
 }
 
 static int init_channels(struct ngene *dev)