diff options
| author |   Peichen Huang <PeiChen.Huang@amd.com> | 2025-06-12 16:06:41 +0800 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2025-06-30 11:58:29 -0400 |
| commit | 158b9201c17fc93ed4253c2f03b77fd2671669a1 (patch) | |
| tree | b42091b68c37116343b686a7196358699a4e2bdf | |
| parent | drm/amdgpu: move scheduler wqueue handling into callbacks (diff) | |
| download | wireguard-linux-158b9201c17fc93ed4253c2f03b77fd2671669a1.tar.xz wireguard-linux-158b9201c17fc93ed4253c2f03b77fd2671669a1.zip | |
drm/amd/display: add null check
[WHY]
Prevents null pointer dereferences to enhance function robustness
[HOW]
Adds early null check and return false if invalid.
Reviewed-by: Cruise Hung <cruise.hung@amd.com>
Signed-off-by: Peichen Huang <PeiChen.Huang@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 0146ad4e23c8..c744aa9d830f 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -6398,11 +6398,13 @@ unsigned int dc_get_det_buffer_size_from_state(const struct dc_state *context) */ bool dc_get_host_router_index(const struct dc_link *link, unsigned int *host_router_index) { - struct dc *dc = link->ctx->dc; + struct dc *dc; - if (link->ep_type != DISPLAY_ENDPOINT_USB4_DPIA) + if (!link || !host_router_index || link->ep_type != DISPLAY_ENDPOINT_USB4_DPIA) return false; + dc = link->ctx->dc; + if (link->link_index < dc->lowest_dpia_link_index) return false; |