[PATCH AUTOSEL 5.6 076/149] drm/amd/display: dc_get_vmid_use_vector() crashes when get called

[Sasha Levin]

From: Peikang Zhang <peikang.zhang@xxxxxxx>

[ Upstream commit 68bbca15e7062f4ae16531e29893f78d0b4840b6 ]

[Why]
int i can go out of boundary which will cause crash

[How]
Fixed the maximum value of i to avoid i going out of boundary

Signed-off-by: Peikang Zhang <peikang.zhang@xxxxxxx>
Reviewed-by: Jun Lei <Jun.Lei@xxxxxxx>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/amd/display/dc/core/dc_vm_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_vm_helper.c b/drivers/gpu/drm/amd/display/dc/core/dc_vm_helper.c
index a96d8de9380e6..f2b39ec35c898 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_vm_helper.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_vm_helper.c
@@ -62,7 +62,7 @@ int dc_get_vmid_use_vector(struct dc *dc)
 	int i;
 	int in_use = 0;
 
-	for (i = 0; i < dc->vm_helper->num_vmid; i++)
+	for (i = 0; i < MAX_HUBP; i++)
 		in_use |= dc->vm_helper->hubp_vmid_usage[i].vmid_usage[0]
 			| dc->vm_helper->hubp_vmid_usage[i].vmid_usage[1];
 	return in_use;
-- 
2.20.1