V4L/DVB (7538): Adds selectable adapter numbers as per module option

The adapter_nr module options can be used to allocate static adapter
numbers on a driver level. It avoids problems with changing DVB apapter
numbers after warm/cold boot or device unplugging and repluging.

Each driver holds DVB_MAX_ADAPTER long array of the preferred order of
adapter numbers.

options dvb-usb-dib0700 adapter_nr=7,6,5,4,3,2,1,0 would result in a
reversed allocation of adapter numbers.

With adapter_nr=2,5 it tries first to get adapter number 2 and 5. If
both are already in use it will allocate the lowest free adapter number.

Signed-off-by: Janne Grunau <janne-dvb@grunau.be>
Acked-by: Hermann Pitton <hermann.pitton@arcor.de>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 12 insertions, 5 deletions

diff --git a/drivers/media/dvb/dvb-usb/dtt200u.c b/drivers/media/dvb/dvb-usb/dtt200u.c
index d86cf9bee91c..81a6cbf60160 100644
--- a/drivers/media/dvb/dvb-usb/dtt200u.c
+++ b/drivers/media/dvb/dvb-usb/dtt200u.c
@@ -18,6 +18,8 @@ int dvb_usb_dtt200u_debug;
 module_param_named(debug,dvb_usb_dtt200u_debug, int, 0644);
 MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2 (or-able))." DVB_USB_DEBUG_STATUS);
 
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
 static int dtt200u_power_ctrl(struct dvb_usb_device *d, int onoff)
 {
         u8 b = SET_INIT;
@@ -101,11 +103,16 @@ static struct dvb_usb_device_properties wt220u_miglia_properties;
 static int dtt200u_usb_probe(struct usb_interface *intf,
                 const struct usb_device_id *id)
 {
-        if (dvb_usb_device_init(intf,&dtt200u_properties,THIS_MODULE,NULL) == 0 ||
-                dvb_usb_device_init(intf,&wt220u_properties,THIS_MODULE,NULL) == 0 ||
-                dvb_usb_device_init(intf,&wt220u_fc_properties,THIS_MODULE,NULL) == 0 ||
-                dvb_usb_device_init(intf,&wt220u_zl0353_properties,THIS_MODULE,NULL) == 0 ||
-                dvb_usb_device_init(intf,&wt220u_miglia_properties,THIS_MODULE,NULL) == 0)
+        if (0 == dvb_usb_device_init(intf, &dtt200u_properties,
+                                     THIS_MODULE, NULL, adapter_nr) ||
+            0 == dvb_usb_device_init(intf, &wt220u_properties,
+                                     THIS_MODULE, NULL, adapter_nr) ||
+            0 == dvb_usb_device_init(intf, &wt220u_fc_properties,
+                                     THIS_MODULE, NULL, adapter_nr) ||
+            0 == dvb_usb_device_init(intf, &wt220u_zl0353_properties,
+                                     THIS_MODULE, NULL, adapter_nr) ||
+            0 == dvb_usb_device_init(intf, &wt220u_miglia_properties,
+                                     THIS_MODULE, NULL, adapter_nr))
                 return 0;
 
         return -ENODEV;