From: Marek Olšák <marek.olsak@amd.com>
Date: Tue, 27 May 2014 00:56:36 +0000 (+0200)
Subject: drm/radeon: don't allow RADEON_GEM_DOMAIN_CPU for command submission
X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=9ca04cfc664d6c7c9c23101da763d5ba871dd63b;p=linux-edison.git

drm/radeon: don't allow RADEON_GEM_DOMAIN_CPU for command submission

commit ec65da385d46f63740c1c9230b891a6dcbd64c71 upstream.

It hangs the hardware.

Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
index fe36f1d9496..60af3cda587 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -96,6 +96,12 @@ 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;