linux-kernel - Regression in Linux next with dma cma changes

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Date:   Tue, 26 Feb 2019 12:01:55 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     Nicolin Chen <nicoleotsuka@...il.com>,
        Christoph Hellwig <hch@....de>
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sebastian Reichel <sre@...nel.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-omap@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Regression in Linux next with dma cma changes

Hi,

Looks like commit d222e42e8816 ("dma-contiguous: do not allocate a
single page from CMA area") caused a regression at least for
omap dss where we now get the following error on init:

omapdss_dispc 58001000.dispc:
dispc_errata_i734_wa_init: dma_alloc_writecombine failed

Any ideas what might be going wrong?

Regards,

Tony