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Re: [PATCH v4 10/11] drivers/char: add RX support to the XHCI driver
- To: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 17 Aug 2022 16:42:56 +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: Wed, 17 Aug 2022 14:43:05 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 13.08.2022 03:39, Marek Marczykowski-Górecki wrote:
> Add another work ring buffer for received data, and point IN TRB at it.
> Ensure there is always at least one pending IN TRB, so the controller
> has a way to send incoming data to the driver.
> Note that both "success" and "short packet" completion codes are okay -
> in fact it will be "short packet" most of the time, as the TRB length is
> about maximum size, not required size.
>
> Signed-off-by: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
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