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Re: [PATCH v3 02/10] drivers/char: reset XHCI ports when initializing dbc
- To: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 4 Aug 2022 15:14:58 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 04 Aug 2022 13:15:05 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 26.07.2022 05:23, Marek Marczykowski-Górecki wrote:
> Reset ports, to force host system to re-enumerate devices. Otheriwse it
> will require the cable to be re-plugged, or will wait in the
> "configuring" state indefinitely.
>
> Trick and code copied from Linux:
> drivers/usb/early/xhci-dbc.c:xdbc_start()->xdbc_reset_debug_port()
>
> Signed-off-by: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
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