From: Alex Hung <alex.hung@xxxxxxx>
Checks null pointer before accessing various structs.
This fixes 5 NULL_RETURNS issues reported by Coverity.
Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>
Acked-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
Signed-off-by: Alex Hung <alex.hung@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dml2/dml21/dml21_utils.c | 2 ++
.../display/dc/dml2/dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c | 5 +++++
.../gpu/drm/amd/display/dc/resource/dcn20/dcn20_resource.c | 2 +-
.../gpu/drm/amd/display/dc/resource/dcn201/dcn201_resource.c | 4 +++-
4 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dml2/dml21/dml21_utils.c b/drivers/gpu/drm/amd/display/dc/dml2/dml21/dml21_utils.c
index 4166332b5b89..b97d9abfdbc6 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2/dml21/dml21_utils.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2/dml21/dml21_utils.c
@@ -360,6 +360,8 @@ static struct dc_plane_state *dml21_add_phantom_plane(struct dml2_context *dml_c
struct dc_plane_state *phantom_plane;
phantom_plane = dml_ctx->config.svp_pstate.callbacks.create_phantom_plane(dc, context, main_plane);
+ if (!phantom_plane)
+ return NULL;
phantom_plane->format = main_plane->format;
phantom_plane->rotation = main_plane->rotation;
diff --git a/drivers/gpu/drm/amd/display/dc/dml2/dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c b/drivers/gpu/drm/amd/display/dc/dml2/dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c
index 7272a04b9d1d..00fedc00a735 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2/dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2/dml21/src/dml2_pmo/dml2_pmo_dcn4_fams2.c
@@ -1082,12 +1082,17 @@ static bool is_timing_group_schedulable(
/* init allow start and end lines for timing group */
stream_method_fams2_meta = get_per_method_common_meta(pmo, per_stream_pstate_strategy[base_stream_idx], base_stream_idx);
+ if (!stream_method_fams2_meta)
+ return false;
+
group_fams2_meta->allow_start_otg_vline = stream_method_fams2_meta->allow_start_otg_vline;
group_fams2_meta->allow_end_otg_vline = stream_method_fams2_meta->allow_end_otg_vline;
group_fams2_meta->period_us = stream_method_fams2_meta->period_us;
for (i = base_stream_idx + 1; i < display_cfg->display_config.num_streams; i++) {
if (is_bit_set_in_bitfield(pmo->scratch.pmo_dcn4.synchronized_timing_group_masks[timing_group_idx], i)) {
stream_method_fams2_meta = get_per_method_common_meta(pmo, per_stream_pstate_strategy[i], i);
+ if (!stream_method_fams2_meta)
+ continue;
if (group_fams2_meta->allow_start_otg_vline < stream_method_fams2_meta->allow_start_otg_vline) {
/* set group allow start to larger otg vline */
diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn20/dcn20_resource.c
index f93853d434d2..e783afbbb397 100644
--- a/drivers/gpu/drm/amd/display/dc/resource/dcn20/dcn20_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/resource/dcn20/dcn20_resource.c
@@ -2628,7 +2628,7 @@ static bool dcn20_resource_construct(
ranges.writer_wm_sets[0].max_drain_clk_mhz = PP_SMU_WM_SET_RANGE_CLK_UNCONSTRAINED_MAX;
/* Notify PP Lib/SMU which Watermarks to use for which clock ranges */
- if (pool->base.pp_smu->nv_funcs.set_wm_ranges)
+ if (pool->base.pp_smu && pool->base.pp_smu->nv_funcs.set_wm_ranges)
pool->base.pp_smu->nv_funcs.set_wm_ranges(&pool->base.pp_smu->nv_funcs.pp_smu, &ranges);
}
diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn201/dcn201_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn201/dcn201_resource.c
index 070a4efb308b..131d98025bd4 100644
--- a/drivers/gpu/drm/amd/display/dc/resource/dcn201/dcn201_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/resource/dcn201/dcn201_resource.c
@@ -795,11 +795,13 @@ static struct link_encoder *dcn201_link_encoder_create(
{
struct dcn20_link_encoder *enc20 =
kzalloc(sizeof(struct dcn20_link_encoder), GFP_ATOMIC);
- struct dcn10_link_encoder *enc10 = &enc20->enc10;
+ struct dcn10_link_encoder *enc10;
if (!enc20)
return NULL;
+ enc10 = &enc20->enc10;
+
dcn201_link_encoder_construct(enc20,
enc_init_data,
&link_enc_feature,
--
2.45.1
