linux-kernel - [PATCH 3.12 083/170] drm/radeon: don't allow RADEON_GEM_DOMAIN

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Date:	Fri, 18 Jul 2014 14:11:28 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Marek Olšák <marek.olsak@....com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 083/170] drm/radeon: don't allow RADEON_GEM_DOMAIN_CPU for command submission

From: Marek Olšák <marek.olsak@....com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit ec65da385d46f63740c1c9230b891a6dcbd64c71 upstream.

It hangs the hardware.

Signed-off-by: Marek Olšák <marek.olsak@....com>
Reviewed-by: Christian König <christian.koenig@....com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/gpu/drm/radeon/radeon_cs.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
index b2b8b38f0319..ed9a997c99a3 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -97,6 +97,12 @@ static int radeon_cs_parser_relocs(struct radeon_cs_parser *p)
 			uint32_t domain = r->write_domain ?
 				r->write_domain : r->read_domains;
 
+			if (domain & RADEON_GEM_DOMAIN_CPU) {
+				DRM_ERROR("RADEON_GEM_DOMAIN_CPU is not valid "
+					  "for command submission\n");
+				return -EINVAL;
+			}
+
 			p->relocs[i].lobj.domain = domain;
 			if (domain == RADEON_GEM_DOMAIN_VRAM)
 				domain |= RADEON_GEM_DOMAIN_GTT;
-- 
2.0.0

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