Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=933e3187d0042d9381d932757dc1f931d984e56d
Commit: 933e3187d0042d9381d932757dc1f931d984e56d
Parent: 1fe8736da695c2b14961438c73d5600538bd92d9
Author: Oliver Neukum <[EMAIL PROTECTED]>
AuthorDate: Wed Jul 11 14:48:58 2007 +0200
Committer: Jiri Kosina <[EMAIL PROTECTED]>
CommitDate: Sun Oct 14 13:40:00 2007 +0200
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 <[EMAIL PROTECTED]>
Signed-off-by: Jiri Kosina <[EMAIL PROTECTED]>
---
drivers/hid/usbhid/hid-core.c | 16 ++++++++++++++--
1 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 0a1f2b5..a34e0f0 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -512,7 +512,16 @@ static int hid_get_class_descriptor(struct usb_device
*dev, int ifnum,
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;
@@ -522,8 +531,10 @@ 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);
+ }
}
/*
@@ -1048,6 +1059,7 @@ 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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