6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michael Chen <michael.chen@xxxxxxx>
[ Upstream commit 10f624ef239bd136cdcc5bbc626157a57b938a31 ]
Currently oem_id is defined as uint8_t[6] and casted to uint64_t*
in some use case. This would lead code scanner to complain about
access beyond. Re-define it in union to enforce 8-byte size and
alignment to avoid potential issue.
Signed-off-by: Michael Chen <michael.chen@xxxxxxx>
Reviewed-by: Felix Kuehling <felix.kuehling@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/amd/amdkfd/kfd_crat.h | 2 --
drivers/gpu/drm/amd/amdkfd/kfd_topology.c | 3 +--
drivers/gpu/drm/amd/amdkfd/kfd_topology.h | 5 ++++-
3 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.h b/drivers/gpu/drm/amd/amdkfd/kfd_crat.h
index a8671061a175..bf90a6479867 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.h
@@ -43,8 +43,6 @@
#define CRAT_OEMTABLEID_LENGTH 8
#define CRAT_RESERVED_LENGTH 6
-#define CRAT_OEMID_64BIT_MASK ((1ULL << (CRAT_OEMID_LENGTH * 8)) - 1)
-
/* Compute Unit flags */
#define COMPUTE_UNIT_CPU (1 << 0) /* Create Virtual CRAT for CPU */
#define COMPUTE_UNIT_GPU (1 << 1) /* Create Virtual CRAT for GPU */
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
index 029916971bf6..d841200a405b 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
@@ -972,8 +972,7 @@ static void kfd_update_system_properties(void)
dev = list_last_entry(&topology_device_list,
struct kfd_topology_device, list);
if (dev) {
- sys_props.platform_id =
- (*((uint64_t *)dev->oem_id)) & CRAT_OEMID_64BIT_MASK;
+ sys_props.platform_id = dev->oem_id64;
sys_props.platform_oem = *((uint64_t *)dev->oem_table_id);
sys_props.platform_rev = dev->oem_revision;
}
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.h b/drivers/gpu/drm/amd/amdkfd/kfd_topology.h
index 19283b8b1688..00a78c2ce686 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.h
@@ -146,7 +146,10 @@ struct kfd_topology_device {
struct attribute attr_gpuid;
struct attribute attr_name;
struct attribute attr_props;
- uint8_t oem_id[CRAT_OEMID_LENGTH];
+ union {
+ uint8_t oem_id[CRAT_OEMID_LENGTH];
+ uint64_t oem_id64;
+ };
uint8_t oem_table_id[CRAT_OEMTABLEID_LENGTH];
uint32_t oem_revision;
};
--
2.43.0
