linux-kernel - Re: [PATCH] usb: host: xhci-plat: Fix timeout on removal of hot pluggable xhci controllers

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Message-ID: <58C116A3.7080909@linux.intel.com>
Date:   Thu, 9 Mar 2017 10:47:31 +0200
From:   Mathias Nyman <mathias.nyman@...ux.intel.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Mathias Nyman <mathias.nyman@...el.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: host: xhci-plat: Fix timeout on removal of hot
 pluggable xhci controllers

On 08.03.2017 21:49, Guenter Roeck wrote:
> Upstream commit 98d74f9ceaef ("xhci: fix 10 second timeout on removal of
> PCI hotpluggable xhci controllers") fixes a problem with hot pluggable PCI
> xhci controllers which can result in excessive timeouts, to the point where
> the system reports a deadlock.
>
> The same problem is seen with hot pluggable xhci controllers using the
> xhci-plat driver, such as the driver used for Type-C ports on rk3399.
> Similar to hot-pluggable PCI controllers, the driver for this chip
> removes the xhci controller from the system when the Type-C cable is
> disconnected.
>
> The solution for PCI devices works just as well for non-PCI devices
> and avoids the problem.
>
> Signed-off-by: Guenter Roeck <linux@...ck-us.net>
> ---


Thanks, adding to queue

-Mathias