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>
diff --git a/drivers/media/dvb/dvb-core/dvbdev.h b/drivers/media/dvb/dvb-core/dvbdev.h
index 6dff10e..5f9a737 100644
--- a/drivers/media/dvb/dvb-core/dvbdev.h
+++ b/drivers/media/dvb/dvb-core/dvbdev.h
@@ -31,6 +31,10 @@
#define DVB_MAJOR 212
+#define DVB_MAX_ADAPTERS 8
+
+#define DVB_UNSET (-1)
+
#define DVB_DEVICE_VIDEO 0
#define DVB_DEVICE_AUDIO 1
#define DVB_DEVICE_SEC 2
@@ -41,6 +45,11 @@
#define DVB_DEVICE_NET 7
#define DVB_DEVICE_OSD 8
+#define DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr) \
+ static short adapter_nr[] = \
+ {[0 ... (DVB_MAX_ADAPTERS - 1)] = DVB_UNSET }; \
+ module_param_array(adapter_nr, short, NULL, 0444); \
+ MODULE_PARM_DESC(adapter_nr, "DVB adapter numbers")
struct dvb_adapter {
int num;
@@ -78,7 +87,9 @@
};
-extern int dvb_register_adapter (struct dvb_adapter *adap, const char *name, struct module *module, struct device *device);
+extern int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
+ struct module *module, struct device *device,
+ short *adapter_nums);
extern int dvb_unregister_adapter (struct dvb_adapter *adap);
extern int dvb_register_device (struct dvb_adapter *adap,
