linux-kernel - Re: [PATCH v2] drm: omapdrm: Improve check for contiguous buffers

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Date:   Fri, 9 Sep 2022 16:08:46 +0300
From:   Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To:     Andrew Davis <afd@...com>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] drm: omapdrm: Improve check for contiguous buffers

On 25/08/2022 19:26, Andrew Davis wrote:
> While a scatter-gather table having only 1 entry does imply it is
> contiguous, it is a logic error to assume the inverse. Tables can have
> more than 1 entry and still be contiguous. Use a proper check here.
> 
> Signed-off-by: Andrew Davis <afd@...com>
> ---
> 
> Changes from v1:
>   - Sent correct version of patch :)

Looks fine to me. But where do you need this? Are contiguous buffers 
with multiple sgt entries handled correctly elsewhere in the driver, 
i.e. do they work? =)

  Tomi