Am Montag, 8. März 2010 16:15:14 schrieb Harrison Metzger:
> Also, the old logic would call usb_autopm_put_interface() if
> shadow_power == 1 and the user requested the display to be off ("echo
> 0 > /sys/$DEVICE/powered"). If usb autosuspend was disabled the
> suspend() function would never be called, and the shadow_power
> variable would still be 1. So the user could "echo 0" multiple times
> (even though the display is already off) and this would really screw
> up the reference count (it would be negative from calling
> usb_autopm_put_interface() multiple times).
>
> This is why there is a separate variable to track if we have called
> usb_autopm_get/put_interface().
OK, why not remove shadow_power?
Regards
Oliver
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