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

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Date:   Tue, 26 Jan 2021 15:13:34 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Ikjoon Jang <ikjn@...omium.org>,
        Mathias Nyman <mathias.nyman@...el.com>
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 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?

thanks,

greg k-h