linux-kernel - Re: [PATCH] usb: xhci-mtk: set the dma max_seg

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Message-ID: <2023062942-thumb-giddily-f0e0@gregkh>
Date:   Thu, 29 Jun 2023 10:40:09 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Ricardo Ribalda <ribalda@...omium.org>
Cc:     Zubin Mithra <zsm@...omium.org>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        linux-usb@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: xhci-mtk: set the dma max_seg_size

On Thu, Jun 29, 2023 at 09:13:23AM +0200, Ricardo Ribalda wrote:
> Hi Zubin
> 
> On Wed, 28 Jun 2023 at 23:57, Zubin Mithra <zsm@...omium.org> wrote:
> >
> > On Wed, Jun 28, 2023 at 11:04:20PM +0200, Ricardo Ribalda wrote:
> > > On Wed, 28 Jun 2023 at 23:00, Ricardo Ribalda <ribalda@...omium.org> wrote:
> > > >
> > > > Allow devices to have dma operations beyond 64K, and avoid warnings such
> > > > as:
> > > >
> > > > DMA-API: xhci-mtk 11200000.usb: mapping sg segment longer than device claims to support [len=98304] [max=65536]
> > > >
> > > > Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
> > > Reported-by: Zubin Mithra <zsm@...omium.org>
> >
> > Should this be cc'd to stable@ as well?
> 
> Not sure, in most of the cases this is "just" a warning fix. Let the
> maintainer decide:

Warnings can cause reboots as the majority of the linux systems in the
world run panic-on-warn, so yes, it should be backported.

thanks,

greg k-h