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authorAlan Stern <stern@rowland.harvard.edu>2007-02-08 16:40:43 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2007-02-16 15:32:21 -0800
commit3f141e2aed586c41c2666d49c70c1c1bbb6d6abd (patch)
treed7308c465ec658fd09b5f6969ccf8a8e9b48f131 /include
parentd1bbb60007597b920beca72cd0b413d10290310a (diff)
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USB: unconfigure devices which have config 0
Some USB devices do have a configuration 0, in contravention of the USB spec. Normally 0 is supposed to indicate that a device is unconfigured. While we can't change what the device is doing, we can change usbcore. This patch (as852) allows usb_set_configuration() to accept a config value of -1 as indicating that the device should be unconfigured. The request actually sent to the device will still contain 0 as the value. But even if the device does have a configuration 0, dev->actconfig will be set to NULL and dev->state will be set to USB_STATE_ADDRESS. Without some sort of special-case handling like this, there is no way to unconfigure these non-compliant devices. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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