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/pluto2/pluto2.c b/drivers/media/dvb/pluto2/pluto2.c
index 08a2599ed74a..960ed5763ae1 100644
--- a/drivers/media/dvb/pluto2/pluto2.c
+++ b/drivers/media/dvb/pluto2/pluto2.c
@@ -39,6 +39,8 @@
 #include "dvbdev.h"
 #include "tda1004x.h"
 
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
 #define DRIVER_NAME             "pluto2"
 
 #define REG_PIDn(n)             ((n) << 2)      /* PID n pattern registers */
@@ -662,7 +664,8 @@ static int __devinit pluto2_probe(struct pci_dev *pdev,
                 goto err_pluto_hw_exit;
 
         /* dvb */
-        ret = dvb_register_adapter(&pluto->dvb_adapter, DRIVER_NAME, THIS_MODULE, &pdev->dev);
+        ret = dvb_register_adapter(&pluto->dvb_adapter, DRIVER_NAME,
+                                   THIS_MODULE, &pdev->dev, adapter_nr);
         if (ret < 0)
                 goto err_i2c_del_adapter;