Hi,
autosuspend for USB HID devices remains problematic as far as mice
and keyboards are concerned. While I am working on a grand solution,
here's a minimalist patch that works for those devices not continously
in use. It'll work for joystick and some other devices.
Regards
Oliver
Signed-off-by: Oliver Neukum <[EMAIL PROTECTED]>
----
--- a/drivers/hid/usbhid/hid-core.c 2007-07-11 10:02:44.000000000 +0200
+++ b/drivers/hid/usbhid/hid-core.c 2007-07-11 10:02:54.000000000 +0200
@@ -506,7 +506,16 @@ static int hid_get_class_descriptor(stru
int usbhid_open(struct hid_device *hid)
{
- ++hid->open;
+ struct usbhid_device *usbhid = hid->driver_data;
+ int res;
+
+ if (!hid->open++) {
+ res = usb_autopm_get_interface(usbhid->intf);
+ if (res < 0) {
+ hid->open--;
+ return -EIO;
+ }
+ }
if (hid_start_in(hid))
hid_io_error(hid);
return 0;
@@ -516,8 +525,10 @@ void usbhid_close(struct hid_device *hid
{
struct usbhid_device *usbhid = hid->driver_data;
- if (!--hid->open)
+ if (!--hid->open) {
usb_kill_urb(usbhid->urbin);
+ usb_autopm_put_interface(usbhid->intf);
+ }
}
/*
@@ -1097,6 +1108,7 @@ static struct usb_driver hid_driver = {
.pre_reset = hid_pre_reset,
.post_reset = hid_post_reset,
.id_table = hid_usb_ids,
+ .supports_autosuspend = 1,
};
static int __init hid_init(void)
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