[PATCH 4.9 34/38] drm/amd/pp: fix typecast error in powerplay.

From: Greg Kroah-Hartman
Date: Mon Dec 04 2017 - 11:03:08 EST


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

------------------

From: Rex Zhu <Rex.Zhu@xxxxxxx>

commit 8d8258bdab735d9f3c4b78e091ecfbb2b2b1f2ca upstream.

resulted in unexpected data truncation

Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Rex Zhu <Rex.Zhu@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/gpu/drm/amd/powerplay/hwmgr/process_pptables_v1_0.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/powerplay/hwmgr/process_pptables_v1_0.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/process_pptables_v1_0.c
@@ -850,9 +850,9 @@ static int init_over_drive_limits(
const ATOM_Tonga_POWERPLAYTABLE *powerplay_table)
{
hwmgr->platform_descriptor.overdriveLimit.engineClock =
- le16_to_cpu(powerplay_table->ulMaxODEngineClock);
+ le32_to_cpu(powerplay_table->ulMaxODEngineClock);
hwmgr->platform_descriptor.overdriveLimit.memoryClock =
- le16_to_cpu(powerplay_table->ulMaxODMemoryClock);
+ le32_to_cpu(powerplay_table->ulMaxODMemoryClock);

hwmgr->platform_descriptor.minOverdriveVDDC = 0;
hwmgr->platform_descriptor.maxOverdriveVDDC = 0;