V4L/DVB (7893): xc5000: bug-fix: allow multiple devices in a single system

The current code passes a context pointer in the xc5000_config struct.
This context pointer is used in the tuner_callback function, used to
reset the device after firmware download.

The xc5000_config struct is a static structure, whose .priv member was
being assigned before calling xc5000_attach().  If there are more than
one of the same device type installed on a single system, the last one
to assign xc5000_config.priv will "win", and all others will cease to
function properly.

This patch passes the context pointer in xc5000_attach() rather that
storing it within the static struct xc5000_config.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

4 files changed, 10 insertions, 16 deletions

diff --git a/drivers/media/video/au0828/au0828-dvb.c b/drivers/media/video/au0828/au0828-dvb.c
index 1371b4e4b5f1..c86a5f17eca8 100644
--- a/drivers/media/video/au0828/au0828-dvb.c
+++ b/drivers/media/video/au0828/au0828-dvb.c
@@ -337,12 +337,10 @@ int au0828_dvb_register(struct au0828_dev *dev)
                 dvb->frontend = dvb_attach(au8522_attach,
                                 &hauppauge_hvr950q_config,
                                 &dev->i2c_adap);
-                if (dvb->frontend != NULL) {
-                        hauppauge_hvr950q_tunerconfig.priv = dev;
+                if (dvb->frontend != NULL)
                         dvb_attach(xc5000_attach, dvb->frontend,
                                 &dev->i2c_adap,
-                                &hauppauge_hvr950q_tunerconfig);
-                }
+                                &hauppauge_hvr950q_tunerconfig, dev);
                 break;
         default:
                 printk(KERN_WARNING "The frontend of your DVB/ATSC card "
diff --git a/drivers/media/video/cx23885/cx23885-dvb.c b/drivers/media/video/cx23885/cx23885-dvb.c
index 47e3f9e035f9..022aa391937a 100644
--- a/drivers/media/video/cx23885/cx23885-dvb.c
+++ b/drivers/media/video/cx23885/cx23885-dvb.c
@@ -384,12 +384,10 @@ static int dvb_register(struct cx23885_tsport *port)
                 port->dvb.frontend = dvb_attach(s5h1409_attach,
                                                 &hauppauge_hvr1500q_config,
                                                 &dev->i2c_bus[0].i2c_adap);
-                if (port->dvb.frontend != NULL) {
-                        hauppauge_hvr1500q_tunerconfig.priv = i2c_bus;
+                if (port->dvb.frontend != NULL)
                         dvb_attach(xc5000_attach, port->dvb.frontend,
                                 &i2c_bus->i2c_adap,
-                                &hauppauge_hvr1500q_tunerconfig);
-                }
+                                &hauppauge_hvr1500q_tunerconfig, i2c_bus);
                 break;
         case CX23885_BOARD_HAUPPAUGE_HVR1500:
                 i2c_bus = &dev->i2c_bus[1];
diff --git a/drivers/media/video/cx88/cx88-dvb.c b/drivers/media/video/cx88/cx88-dvb.c
index 75e2e58349ef..d96173ff1dba 100644
--- a/drivers/media/video/cx88/cx88-dvb.c
+++ b/drivers/media/video/cx88/cx88-dvb.c
@@ -816,11 +816,10 @@ static int dvb_register(struct cx8802_dev *dev)
                         /* tuner_config.video_dev must point to
                          * i2c_adap.algo_data
                          */
-                        pinnacle_pctv_hd_800i_tuner_config.priv =
-                                                core->i2c_adap.algo_data;
                         if (!dvb_attach(xc5000_attach, dev->dvb.frontend,
                                         &core->i2c_adap,
-                                        &pinnacle_pctv_hd_800i_tuner_config))
+                                        &pinnacle_pctv_hd_800i_tuner_config,
+                                        core->i2c_adap.algo_data))
                                 goto frontend_detach;
                 }
                 break;
@@ -878,11 +877,10 @@ static int dvb_register(struct cx8802_dev *dev)
                         /* tuner_config.video_dev must point to
                          * i2c_adap.algo_data
                          */
-                        dvico_fusionhdtv7_tuner_config.priv =
-                                                core->i2c_adap.algo_data;
                         if (!dvb_attach(xc5000_attach, dev->dvb.frontend,
                                         &core->i2c_adap,
-                                        &dvico_fusionhdtv7_tuner_config))
+                                        &dvico_fusionhdtv7_tuner_config,
+                                        core->i2c_adap.algo_data))
                                 goto frontend_detach;
                 }
                 break;
diff --git a/drivers/media/video/tuner-core.c b/drivers/media/video/tuner-core.c
index 4ca686fad557..5a75788b92ae 100644
--- a/drivers/media/video/tuner-core.c
+++ b/drivers/media/video/tuner-core.c
@@ -448,10 +448,10 @@ static void set_type(struct i2c_client *c, unsigned int type,
 
                 xc5000_cfg.i2c_address    = t->i2c->addr;
                 xc5000_cfg.if_khz         = 5380;
-                xc5000_cfg.priv           = c->adapter->algo_data;
                 xc5000_cfg.tuner_callback = t->tuner_callback;
                 if (!dvb_attach(xc5000_attach,
-                                &t->fe, t->i2c->adapter, &xc5000_cfg))
+                                &t->fe, t->i2c->adapter, &xc5000_cfg,
+                                c->adapter->algo_data))
                         goto attach_failed;
 
                 xc_tuner_ops = &t->fe.ops.tuner_ops;