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>

2 files changed, 8 insertions, 3 deletions

diff --git a/drivers/media/dvb/ttpci/av7110.c b/drivers/media/dvb/ttpci/av7110.c
index 78919b9e14dc..747e7f1a6267 100644
--- a/drivers/media/dvb/ttpci/av7110.c
+++ b/drivers/media/dvb/ttpci/av7110.c
@@ -112,6 +112,8 @@ MODULE_PARM_DESC(wss_cfg_16_9, "WSS 16:9 - default 0x0007 - bit 15: disable, 14:
 module_param(tv_standard, int, 0444);
 MODULE_PARM_DESC(tv_standard, "TV standard: 0 PAL (default), 1 NTSC");
 
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
 static void restart_feeds(struct av7110 *av7110);
 
 static int av7110_num;
@@ -2461,7 +2463,7 @@ static int __devinit av7110_attach(struct saa7146_dev* dev,
                 goto err_kfree_0;
 
         ret = dvb_register_adapter(&av7110->dvb_adapter, av7110->card_name,
-                                   THIS_MODULE, &dev->pci->dev);
+                                   THIS_MODULE, &dev->pci->dev, adapter_nr);
         if (ret < 0)
                 goto err_put_firmware_1;
 
diff --git a/drivers/media/dvb/ttpci/budget-core.c b/drivers/media/dvb/ttpci/budget-core.c
index 06bbce42fcd7..18cac4b12ab2 100644
--- a/drivers/media/dvb/ttpci/budget-core.c
+++ b/drivers/media/dvb/ttpci/budget-core.c
@@ -57,6 +57,8 @@ module_param_named(bufsize, dma_buffer_size, int, 0444);
 MODULE_PARM_DESC(debug, "Turn on/off budget debugging (default:off).");
 MODULE_PARM_DESC(bufsize, "DMA buffer size in KB, default: 188, min: 188, max: 1410 (Activy: 564)");
 
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
 /****************************************************************************
  * TT budget / WinTV Nova
  ****************************************************************************/
@@ -471,9 +473,10 @@ int ttpci_budget_init(struct budget *budget, struct saa7146_dev *dev,
                 budget->buffer_width, budget->buffer_height);
         printk("%s: dma buffer size %u\n", budget->dev->name, budget->buffer_size);
 
-        if ((ret = dvb_register_adapter(&budget->dvb_adapter, budget->card->name, owner, &budget->dev->pci->dev)) < 0) {
+        ret = dvb_register_adapter(&budget->dvb_adapter, budget->card->name,
+                                   owner, &budget->dev->pci->dev, adapter_nr);
+        if (ret < 0)
                 return ret;
-        }
 
         /* set dd1 stream a & b */
         saa7146_write(dev, DD1_STREAM_B, 0x00000000);