[U-Boot] [PATCH] usb: ehci: remember init mode

[Stephen Warren <swarren@wwwdotorg.org>]

On 08/20/2015 11:34 PM, Marek Vasut wrote:
> On Friday, August 21, 2015 at 01:38:05 AM, Stephen Warren wrote:
>> From: Stephen Warren <swarren@nvidia.com>
>>
>> When an EHCI device is registered in device mode, the HW isn't actually
>> initialized at all, and hence isn't left in a running state. Consequently,
>> when the device is deregistered, ehci_shutdown() will fail, since the HW
>> bits it expects to see set in response to its shutdown requests will not
>> be sent, and the message "EHCI failed to shut down host controller." will
>> be printed.
>>
>> Fix ehci-hcd.c to remember whether the device was registered in host or
>> device mode, and only call ehci_shutdown() for host mode registrations.
>
> Hi,
>
> Shouldn't you instead check if the controller is running or not and shut
> it down based on that ?

Why would the two states be different? How can the code check if the 
controller is running; is there some HW bit that should be checked for that?