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, 5 insertions, 1 deletions

diff --git a/drivers/media/dvb/dvb-usb/opera1.c b/drivers/media/dvb/dvb-usb/opera1.c
index 302cc67407c3..0eef5fe094e1 100644
--- a/drivers/media/dvb/dvb-usb/opera1.c
+++ b/drivers/media/dvb/dvb-usb/opera1.c
@@ -46,6 +46,9 @@ MODULE_PARM_DESC(debug,
                  "set debugging level (1=info,xfer=2,pll=4,ts=8,err=16,rc=32,fw=64 (or-able))."
                  DVB_USB_DEBUG_STATUS);
 
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
+
 static int opera1_xilinx_rw(struct usb_device *dev, u8 request, u16 value,
                             u8 * data, u16 len, int flags)
 {
@@ -548,7 +551,8 @@ static int opera1_probe(struct usb_interface *intf,
                 return -EINVAL;
         }
 
-        if (dvb_usb_device_init(intf, &opera1_properties, THIS_MODULE, NULL) != 0)
+        if (0 != dvb_usb_device_init(intf, &opera1_properties,
+                                     THIS_MODULE, NULL, adapter_nr))
                 return -EINVAL;
         return 0;
 }