[PATCH 5.8 049/124] drm/amd/display: fix return value check for hdcp_work

[Greg Kroah-Hartman]

From: Flora Cui <flora....@amd.com>

[ Upstream commit 898c7302f4de1d91065e80fc46552b3ec70894ff ]

max_caps might be 0, thus hdcp_work might be ZERO_SIZE_PTR

Signed-off-by: Flora Cui <flora....@amd.com>
Reviewed-by: Feifei Xu <feifei...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c 
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
index 949d10ef83040..6dd1f3f8d9903 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
@@ -568,7 +568,7 @@ struct hdcp_workqueue *hdcp_create_workqueue(struct 
amdgpu_device *adev, struct
        int i = 0;
 
        hdcp_work = kcalloc(max_caps, sizeof(*hdcp_work), GFP_KERNEL);
-       if (hdcp_work == NULL)
+       if (ZERO_OR_NULL_PTR(hdcp_work))
                return NULL;
 
        hdcp_work->srm = kcalloc(PSP_HDCP_SRM_FIRST_GEN_MAX_SIZE, 
sizeof(*hdcp_work->srm), GFP_KERNEL);
-- 
2.25.1