linux-kernel - Re: [PATCH] usb: xhci: make XHCI_STOP_EP_CMD

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Message-ID: <YiIfZFPl9ZqPBKvj@kroah.com>
Date:   Fri, 4 Mar 2022 15:17:08 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Martin Kepplinger <martin.kepplinger@...i.sm>
Cc:     mathias.nyman@...el.com, kernel@...i.sm, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: xhci: make XHCI_STOP_EP_CMD_TIMEOUT a module
 parameter

On Fri, Mar 04, 2022 at 12:30:57PM +0100, Martin Kepplinger wrote:
> On the Librem 5 imx8mq system we've seen the stop endpoint command
> time out regularly which results in the hub dying.
> 
> While on the one hand we see "Port resume timed out, port 1-1: 0xfe3"
> before this and on the other hand driver-comments suggest that the driver
> might be able to recover instead of dying here, Sarah seemed to have a
> workaround for this particulator problem in mind already:
> 
> Make it a module parameter. So while it might not be the root cause for
> the problem, do this to give users a workaround.

This is not the 1990's, sorry, please do not add new module parameters.
They modify code, when you want to modify an individual device.

thanks,

greg k-h