From: Jeremy Kerr <jk@xxxxxxxxxx> Currently, the cx88-input code unconditionally establishes an input device for IR events. On some cards, this sets up a hrtimer to poll the IR status frequently - I get around 200 wakeups per second from this polling, and don't use the IR ports. Although the hrtimer is only run when the input device is opened, the device is actually unconditionally opened by kbd_connect, because we have the EV_KEY bit set in the input device descriptor. In effect, the IR device is always opened (and so polling) if CONFIG_VT. This change adds a module parameter, 'ir_disable' to disable the IR code, and not register this input device at all. This drastically reduces the number of wakeups per second for me. Signed-off-by: Jeremy Kerr <jk@xxxxxxxxxx> --- drivers/media/video/cx88/cx88-input.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/media/video/cx88/cx88-input.c b/drivers/media/video/cx88/cx88-input.c index fc777bc..d49af18 100644 --- a/drivers/media/video/cx88/cx88-input.c +++ b/drivers/media/video/cx88/cx88-input.c @@ -67,6 +67,10 @@ static int ir_debug; module_param(ir_debug, int, 0644); /* debug level [IR] */ MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]"); +static int ir_disable; +module_param(ir_disable, int, 0644); +MODULE_PARM_DESC(ir_disable, "disable IR support"); + #define ir_dprintk(fmt, arg...) if (ir_debug) \ printk(KERN_DEBUG "%s IR: " fmt , ir->core->name , ##arg) @@ -244,6 +248,9 @@ int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci) * used with a full-code IR table */ + if (ir_disable) + return 0; + ir = kzalloc(sizeof(*ir), GFP_KERNEL); input_dev = input_allocate_device(); if (!ir || !input_dev) -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
