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From:   Felipe Balbi <balbi@kernel.org>
To:     Zeng Tao <prime.zeng@hisilicon.com>
Cc:     liangshengjun@hisilicon.com, Zeng Tao <prime.zeng@hisilicon.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] usb: dwc3: gadget: fix miss isoc issue introduced by IRQ latency
In-Reply-To: <1544805179-2248-1-git-send-email-prime.zeng@hisilicon.com>
References: <1544805179-2248-1-git-send-email-prime.zeng@hisilicon.com>
Date:   Fri, 14 Dec 2018 10:51:54 +0200
Message-ID: <87efaklcd1.fsf@linux.intel.com>
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Zeng Tao <prime.zeng@hisilicon.com> writes:

> If it's a busy system, some times when we start an isoc transfer, the
> framenumber get from the event buffer may be already elasped, in this
>  case, we will get all the packets dropped due to miss isoc. And we turn
> into transfer nothing, to fix this issue, we need to fix the framenumber
> to make sure that it's not out of date.
>
> Signed-off-by: Liang Shengjun <liangshengjun@hisilicon.com>
> Signed-off-by: Zeng Tao <prime.zeng@hisilicon.com>

There's a patch going upstream already doing this:

https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git/commit/?h=3Dn=
ext&id=3Dd53701067f048b8b11635e964b6d3bd9a248c622

=2D-=20
balbi

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