Re: [PATCH v2] usb hub: send clear_tt_buffer_complete events whencanceling TT clear work

[Alan Stern]

On Mon, 1 Oct 2012, Octavian Purdila wrote:

> There is a race condition in the USB hub code with regard to handling
> TT clear requests that can get the HCD driver in a deadlock. Usually
> when an TT clear request is scheduled it will be executed immediately:

...

> This patch changes hub_quiesce behavior to flush the TT clear work
> instead of canceling it, to make sure that no TT clear request remains
> uncompleted before suspend.
> 
> Signed-off-by: Octavian Purdila <octavian.purdila@xxxxxxxxx>

Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>

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