linux-kernel - Re: [PATCH v6] usb: xhci-mtk: fix unreleased bandwidth data

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Date:   Tue, 26 Jan 2021 16:27:28 +0200
From:   Mathias Nyman <mathias.nyman@...el.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ikjoon Jang <ikjn@...omium.org>
Cc:     linux-mediatek@...ts.infradead.org, linux-usb@...r.kernel.org,
        Zhanyong Wang <zhanyong.wang@...iatek.com>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Tianping Fang <tianping.fang@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6] usb: xhci-mtk: fix unreleased bandwidth data

On 26.1.2021 16.13, Greg Kroah-Hartman wrote:
> On Wed, Jan 13, 2021 at 06:05:11PM +0800, Ikjoon Jang wrote:
>> xhci-mtk needs XHCI_MTK_HOST quirk functions in add_endpoint() and
>> drop_endpoint() to handle its own sw bandwidth management.
>>
>> It stores bandwidth data into an internal table every time
>> add_endpoint() is called, and drops those in drop_endpoint().
>> But when bandwidth allocation fails at one endpoint, all earlier
>> allocation from the same interface could still remain at the table.
>>
>> This patch moves bandwidth management codes to check_bandwidth() and
>> reset_bandwidth() path. To do so, this patch also adds those functions
>> to xhci_driver_overrides and lets mtk-xhci to release all failed
>> endpoints in reset_bandwidth() path.
>>
>> Fixes: 08e469de87a2 ("usb: xhci-mtk: supports bandwidth scheduling with multi-TT")
>> Signed-off-by: Ikjoon Jang <ikjn@...omium.org>
> 
> Mathias, any objection to me taking this patch, or do you have others
> being queued up for 5.11-final?
> 

No objections, haven't tried it out but it looks good to me.

If I finish some additional small fix for 5.11-final I can make it on top of this

-Mathias