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, 10 insertions, 4 deletions

diff --git a/drivers/media/dvb/dvb-usb/dibusb-mb.c b/drivers/media/dvb/dvb-usb/dibusb-mb.c
index 043cadae0859..eeef50bff4f9 100644
--- a/drivers/media/dvb/dvb-usb/dibusb-mb.c
+++ b/drivers/media/dvb/dvb-usb/dibusb-mb.c
@@ -14,6 +14,8 @@
  */
 #include "dibusb.h"
 
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
 static int dib3000mb_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
 {
         struct dvb_usb_adapter *adap = fe->dvb->priv;
@@ -107,10 +109,14 @@ static struct dvb_usb_device_properties artec_t1_usb2_properties;
 static int dibusb_probe(struct usb_interface *intf,
                 const struct usb_device_id *id)
 {
-        if (dvb_usb_device_init(intf,&dibusb1_1_properties,THIS_MODULE,NULL) == 0 ||
-                dvb_usb_device_init(intf,&dibusb1_1_an2235_properties,THIS_MODULE,NULL) == 0 ||
-                dvb_usb_device_init(intf,&dibusb2_0b_properties,THIS_MODULE,NULL) == 0 ||
-                dvb_usb_device_init(intf,&artec_t1_usb2_properties,THIS_MODULE,NULL) == 0)
+        if (0 == dvb_usb_device_init(intf, &dibusb1_1_properties,
+                                     THIS_MODULE, NULL, adapter_nr) ||
+            0 == dvb_usb_device_init(intf, &dibusb1_1_an2235_properties,
+                                     THIS_MODULE, NULL, adapter_nr) ||
+            0 == dvb_usb_device_init(intf, &dibusb2_0b_properties,
+                                     THIS_MODULE, NULL, adapter_nr) ||
+            0 == dvb_usb_device_init(intf, &artec_t1_usb2_properties,
+                                     THIS_MODULE, NULL, adapter_nr))
                 return 0;
 
         return -EINVAL;