linux-kernel - Re: [PATCH v2] drm/sun4i: Fix dsi dcs long write function

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Message-ID: <20200831124148.wxklchu3bygnumt4@gilmour.lan>
Date:   Mon, 31 Aug 2020 14:41:48 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Ondrej Jirman <megous@...ous.com>
Cc:     linux-sunxi@...glegroups.com,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Chen-Yu Tsai <wens@...e.org>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        "open list:DRM DRIVERS FOR ALLWINNER A10" 
        <dri-devel@...ts.freedesktop.org>,
        "moderated list:ARM/Allwinner sunXi SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] drm/sun4i: Fix dsi dcs long write function

On Fri, Aug 28, 2020 at 02:50:32PM +0200, Ondrej Jirman wrote:
> It's writing too much data. regmap_bulk_write expects number of
> register sized chunks to write, not a byte sized length of the
> bounce buffer. Bounce buffer needs to be padded too, so that
> regmap_bulk_write will not read past the end of the buffer.
> 
> Fixes: 133add5b5ad4 ("drm/sun4i: Add Allwinner A31 MIPI-DSI controller support")
> Signed-off-by: Ondrej Jirman <megous@...ous.com>
> Reviewed-by: Jernej Skrabec <jernej.skrabec@...l.net>

Applied, thanks
Maxime

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