[PATCH] dvb: usb: add module parm to disable remote control polling

Add module parameter to deactive remote control polling.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 12 insertions, 1 deletions

diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-common.h b/drivers/media/dvb/dvb-usb/dvb-usb-common.h
index abf7d2f562b8..7300489d3e24 100644
--- a/drivers/media/dvb/dvb-usb/dvb-usb-common.h
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-common.h
@@ -12,6 +12,7 @@
 #include "dvb-usb.h"
 
 extern int dvb_usb_debug;
+extern int dvb_usb_disable_rc_polling;
 
 #define deb_info(args...) dprintk(dvb_usb_debug,0x01,args)
 #define deb_xfer(args...) dprintk(dvb_usb_debug,0x02,args)
diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-init.c b/drivers/media/dvb/dvb-usb/dvb-usb-init.c
index 3aadec974cf1..c3b3ae4f3ec7 100644
--- a/drivers/media/dvb/dvb-usb/dvb-usb-init.c
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-init.c
@@ -18,6 +18,10 @@ int dvb_usb_debug;
 module_param_named(debug,dvb_usb_debug, int, 0644);
 MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,pll=4,ts=8,err=16,rc=32,fw=64 (or-able))." DVB_USB_DEBUG_STATUS);
 
+int dvb_usb_disable_rc_polling;
+module_param_named(disable_rc_polling, dvb_usb_disable_rc_polling, int, 0644);
+MODULE_PARM_DESC(disable_rc_polling, "disable remote control polling (default: 0).");
+
 /* general initialization functions */
 int dvb_usb_exit(struct dvb_usb_device *d)
 {
diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-remote.c b/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
index 9f1e23f82bae..f4038bf21c91 100644
--- a/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
@@ -21,6 +21,10 @@ static void dvb_usb_read_remote_control(void *data)
         /* TODO: need a lock here.  We can simply skip checking for the remote control
            if we're busy. */
 
+        /* when the parameter has been set to 1 via sysfs while the driver was running */
+        if (dvb_usb_disable_rc_polling)
+                return;
+
         if (d->props.rc_query(d,&event,&state)) {
                 err("error while querying for an remote control event.");
                 goto schedule;
@@ -85,7 +89,9 @@ schedule:
 int dvb_usb_remote_init(struct dvb_usb_device *d)
 {
         int i;
-        if (d->props.rc_key_map == NULL)
+        if (d->props.rc_key_map == NULL ||
+                d->props.rc_query == NULL ||
+                dvb_usb_disable_rc_polling)
                 return 0;
 
         /* Initialise the remote-control structures.*/