linux-kernel - [PATCH 25/83] hsa/radeon: fix the OEMID assignment in kfd

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Date:	Fri, 11 Jul 2014 00:50:25 +0300
From:	Oded Gabbay <oded.gabbay@...il.com>
To:	David Airlie <airlied@...ux.ie>,
	Alex Deucher <alexander.deucher@....com>,
	Jerome Glisse <j.glisse@...il.com>
Cc:	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	John Bridgman <John.Bridgman@....com>,
	Andrew Lewycky <Andrew.Lewycky@....com>,
	Joerg Roedel <joro@...tes.org>,
	Evgeny Pinchuk <evgeny.pinchuk@....com>,
	Oded Gabbay <oded.gabbay@....com>
Subject: [PATCH 25/83] hsa/radeon: fix the OEMID assignment in kfd_topology

From: Evgeny Pinchuk <evgeny.pinchuk@....com>

The assignment of OEMID from the CRAT table is into a 64 variable. The OEMID is 48bit wide in the CRAT.
This fix makes sure that only 48bit are assigned for the OEMID value from the CRAT table.

Signed-off-by: Evgeny Pinchuk <evgeny.pinchuk@....com>
Signed-off-by: Oded Gabbay <oded.gabbay@....com>
---
 drivers/gpu/hsa/radeon/kfd_crat.h     | 2 ++
 drivers/gpu/hsa/radeon/kfd_topology.c | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/hsa/radeon/kfd_crat.h b/drivers/gpu/hsa/radeon/kfd_crat.h
index 587455d..a374fa3 100644
--- a/drivers/gpu/hsa/radeon/kfd_crat.h
+++ b/drivers/gpu/hsa/radeon/kfd_crat.h
@@ -42,6 +42,8 @@
 #define CRAT_OEMTABLEID_LENGTH	8
 #define CRAT_RESERVED_LENGTH	6
 
+#define CRAT_OEMID_64BIT_MASK ((1ULL << (CRAT_OEMID_LENGTH * 8)) - 1)
+
 struct crat_header {
 	uint32_t	signature;
 	uint32_t	length;
diff --git a/drivers/gpu/hsa/radeon/kfd_topology.c b/drivers/gpu/hsa/radeon/kfd_topology.c
index 6acac25..2ee5444 100644
--- a/drivers/gpu/hsa/radeon/kfd_topology.c
+++ b/drivers/gpu/hsa/radeon/kfd_topology.c
@@ -467,10 +467,10 @@ static int kfd_parse_crat_table(void *crat_image)
 		if (!top_dev) {
 			kfd_release_live_view();
 			return -ENOMEM;
+		}
 	}
-}
 
-	sys_props.platform_id = *((uint64_t *)crat_table->oem_id);
+	sys_props.platform_id = (*((uint64_t *)crat_table->oem_id)) & CRAT_OEMID_64BIT_MASK;
 	sys_props.platform_oem = *((uint64_t *)crat_table->oem_table_id);
 	sys_props.platform_rev = crat_table->revision;
 
-- 
1.9.1

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