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/gp8psk.c b/drivers/media/dvb/dvb-usb/gp8psk.c
index 83e8535014c6..9a942afaf0af 100644
--- a/drivers/media/dvb/dvb-usb/gp8psk.c
+++ b/drivers/media/dvb/dvb-usb/gp8psk.c
@@ -22,6 +22,8 @@ int dvb_usb_gp8psk_debug;
 module_param_named(debug,dvb_usb_gp8psk_debug, int, 0644);
 MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,rc=4 (or-able))." DVB_USB_DEBUG_STATUS);
 
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
 int gp8psk_usb_in_op(struct dvb_usb_device *d, u8 req, u16 value, u16 index, u8 *b, int blen)
 {
         int ret = 0,try = 0;
@@ -190,7 +192,8 @@ static int gp8psk_usb_probe(struct usb_interface *intf,
 {
         int ret;
         struct usb_device *udev = interface_to_usbdev(intf);
-        ret =  dvb_usb_device_init(intf,&gp8psk_properties,THIS_MODULE,NULL);
+        ret = dvb_usb_device_init(intf, &gp8psk_properties,
+                                  THIS_MODULE, NULL, adapter_nr);
         if (ret == 0) {
                 info("found Genpix USB device pID = %x (hex)",
                         le16_to_cpu(udev->descriptor.idProduct));