linux-kernel - Re: [PATCH] usb: core: stop USB enumeration if too many retries

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Message-ID: <Yw4GH4U5ULV3VFSY@kroah.com>
Date:   Tue, 30 Aug 2022 14:44:15 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Ray Chi <raychi@...gle.com>
Cc:     mathias.nyman@...ux.intel.com, stern@...land.harvard.edu,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        albertccwang@...gle.com, badhri@...gle.com, pumahsu@...gle.com
Subject: Re: [PATCH] usb: core: stop USB enumeration if too many retries

On Fri, Aug 26, 2022 at 03:58:39PM +0800, Ray Chi wrote:
> If a broken accessory connected to a USB host, usbcore might
> keep doing enumeration retries and it will take a long time to
> cause system unstable.
> 
> This patch provides a quirk to specific USB ports of the hub to
> stop USB enumeration if needed.

Where does it ever allow the port to handle new devices in the future if
the device is removed and then a new one is added back?  Or is the port
just now dead for forever?

thanks,

greg k-h