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

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Date:   Wed, 2 Nov 2022 07:35:01 +0000
From:   Pawel Laszczak <pawell@...ence.com>
To:     Greg KH <gregkh@...uxfoundation.org>,
        Jing Leng <jleng@...arella.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-usb@...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>

Acked-by: Pawel Laszczak <pawell@...ence.com>

Thanks,
Pawel Laaszczak

>> ---
>> 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