linux-kernel - [PATCH 12/16] staging/comedi: mark as broken

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Date:   Fri, 14 Jun 2019 15:47:22 +0200
From:   Christoph Hellwig <hch@....de>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Ian Abbott <abbotti@....co.uk>,
        H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc:     Intel Linux Wireless <linuxwifi@...el.com>,
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM PORT),
        dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        linux-rdma@...r.kernel.org, linux-media@...r.kernel.org,
        netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
        linux-s390@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-mm@...ck.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 12/16] staging/comedi: mark as broken

comedi_buf.c abuse the DMA API in gravely broken ways, as it assumes it
can call virt_to_page on the result, and the just remap it as uncached
using vmap.  Disable the driver until this API abuse has been fixed.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 drivers/staging/comedi/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/comedi/Kconfig b/drivers/staging/comedi/Kconfig
index 049b659fa6ad..e7c021d76cfa 100644
--- a/drivers/staging/comedi/Kconfig
+++ b/drivers/staging/comedi/Kconfig
@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 config COMEDI
 	tristate "Data acquisition support (comedi)"
+	depends on BROKEN
 	help
 	  Enable support for a wide range of data acquisition devices
 	  for Linux.
-- 
2.20.1