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, 4 insertions, 1 deletions

diff --git a/drivers/media/dvb/dvb-usb/af9005.c b/drivers/media/dvb/dvb-usb/af9005.c
index e7f76f515b4f..cfe71feefcad 100644
--- a/drivers/media/dvb/dvb-usb/af9005.c
+++ b/drivers/media/dvb/dvb-usb/af9005.c
@@ -39,6 +39,8 @@ int dvb_usb_af9005_dump_eeprom = 0;
 module_param_named(dump_eeprom, dvb_usb_af9005_dump_eeprom, int, 0);
 MODULE_PARM_DESC(dump_eeprom, "dump contents of the eeprom.");
 
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
 /* remote control decoder */
 int (*rc_decode) (struct dvb_usb_device * d, u8 * data, int len, u32 * event,
                   int *state);
@@ -1020,7 +1022,8 @@ static struct dvb_usb_device_properties af9005_properties;
 static int af9005_usb_probe(struct usb_interface *intf,
                             const struct usb_device_id *id)
 {
-        return dvb_usb_device_init(intf, &af9005_properties, THIS_MODULE, NULL);
+        return dvb_usb_device_init(intf, &af9005_properties,
+                                   THIS_MODULE, NULL, adapter_nr);
 }
 
 static struct usb_device_id af9005_usb_table[] = {