On Tue, 30 Mar 2010, Bruno Prémont wrote:

Add suspend/resume hooks for HID drivers so these can do some
additional state adjustment when device gets suspended/resumed.

This patch calls these hooks from usbhid suspend/resume functions,
only calling suspend on plain suspend, not autosuspend.
(it might be worth adding an autosuspend parameter to suspend
hook and calling suspend in both cases)

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
---

Note:
  this patch needs improvements as mentionned by Olivier Neukum:
  - suspend hook for both system suspend and autosuspend
  - no call of hook on USB-HID-resume failure

I agree with Oliver's comments.

We should also consider putting the hook calls into bluetooth 
implementation as well (though there is currently no driver using it, but 
I don't know, maybe Wacom could benefit from it as well).

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.