linux-kernel - Re: [PATCH v3] usb: cdnsp: Fix wrong transmission direction of EP0

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Date:   Tue, 1 Nov 2022 10:43:21 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Jing Leng <jleng@...arella.com>
Cc:     pawell@...ence.com, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH v3] usb: cdnsp: Fix wrong transmission direction of EP0

On Tue, Nov 01, 2022 at 02:17:30PM +0800, Jing Leng wrote:
> EP0 transfer is bi-directional, but in the cdnsp gadget, the
> transmission direction of EP0 is not changed after it is
> initialized to IN, so the OUT data from EP0 received by the host
> is invalid.
> 
> The value of ep0_expect_in will change according to the value of
> bRequestType in the SETUP transaction of control transfer, so we
> can use it as the transmission direction of EP0.
> 
> Signed-off-by: Jing Leng <jleng@...arella.com>
> ---
> ChangeLog v2->v3:
> - Repair my email address.

Yes, it works, and it's validated!

Nice job, thanks.  I'll let the cdns3 maintainer review it first, but
just wanted to say thanks for fixing this up, it makes my life a lot
easier when accepting patches.

greg k-h