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HID: minimal autosuspend support for USB HID devices 

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.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Oliver Neukum 2007-07-11 14:48:58 +02:00 committed by Jiri Kosina
parent 1fe8736da6
commit 933e3187d0
1 changed files with 14 additions and 2 deletions
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16
drivers/hid/usbhid/hid-core.c
View File

@ -512,7 +512,16 @@ static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
int usbhid_open(struct hid_device *hid) 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)) if (hid_start_in(hid))
hid_io_error(hid); hid_io_error(hid);
return 0; return 0;
@ -522,8 +531,10 @@ void usbhid_close(struct hid_device *hid)
{ {
struct usbhid_device *usbhid = hid->driver_data; struct usbhid_device *usbhid = hid->driver_data;
if (!--hid->open) if (!--hid->open) {
usb_kill_urb(usbhid->urbin); usb_kill_urb(usbhid->urbin);
usb_autopm_put_interface(usbhid->intf);
}
} }
/* /*
@ -1048,6 +1059,7 @@ static struct usb_driver hid_driver = {
.pre_reset = hid_pre_reset, .pre_reset = hid_pre_reset,
.post_reset = hid_post_reset, .post_reset = hid_post_reset,
.id_table = hid_usb_ids, .id_table = hid_usb_ids,
.supports_autosuspend = 1,
}; };
static int __init hid_init(void) static int __init hid_init(void)