From: Alex Hung <alex.h...@amd.com>
dc_state_get_stream_status dc_state_get_paired_subvp_stream and other
functions can return null, and therefore null must be checked before
status can be used.
This fixes 21 NULL_RETURNS issues reported by Coverity.
Reviewed-by: Harry Wentland <harry.wentl...@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahf...@amd.com>
Signed-off-by: Alex Hung <alex.h...@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 17 +++++++++----
.../gpu/drm/amd/display/dc/core/dc_state.c | 24 ++++++++++++-------
drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c | 20 ++++++++++++++--
.../drm/amd/display/dc/dml/dcn32/dcn32_fpu.c | 8 +++----
.../amd/display/dc/dml2/dml21/dml21_utils.c | 12 +++++++++-
.../display/dc/dml2/dml2_dc_resource_mgmt.c | 6 +++--
.../amd/display/dc/hwss/dcn20/dcn20_hwseq.c | 9 ++++---
.../dc/resource/dcn32/dcn32_resource.c | 2 ++
8 files changed, 74 insertions(+), 24 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c
b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 25a498f65c1c..fce1c3e03094 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1233,11 +1233,14 @@ static void disable_dangling_plane(struct dc *dc,
struct dc_state *context)
*/
if (is_phantom) {
if (tg->funcs->enable_crtc) {
- int main_pipe_width, main_pipe_height;
+ int main_pipe_width = 0,
main_pipe_height = 0;
struct dc_stream_state
*old_paired_stream = dc_state_get_paired_subvp_stream(dc->current_state,
old_stream);
- main_pipe_width =
old_paired_stream->dst.width;
- main_pipe_height =
old_paired_stream->dst.height;
+ if (old_paired_stream) {
+ main_pipe_width =
old_paired_stream->dst.width;
+ main_pipe_height =
old_paired_stream->dst.height;
+ }
+
if (dc->hwss.blank_phantom)
dc->hwss.blank_phantom(dc, tg,
main_pipe_width, main_pipe_height);
tg->funcs->enable_crtc(tg);
@@ -1628,6 +1631,9 @@ static void program_timing_sync(
for (k = 0; k < group_size; k++) {
struct dc_stream_status *status =
dc_state_get_stream_status(ctx, pipe_set[k]->stream);
+ if (!status)
+ continue;
+
status->timing_sync_info.group_id = num_group;
status->timing_sync_info.group_size = group_size;
if (k == 0)
@@ -2225,6 +2231,9 @@ enum dc_status dc_commit_streams(struct dc *dc, struct
dc_commit_streams_params
if (dc_is_embedded_signal(params->streams[i]->signal)) {
struct dc_stream_status *status =
dc_state_get_stream_status(context, params->streams[i]);
+ if (!status)
+ continue;
+
if (dc->hwss.is_abm_supported)
status->is_abm_supported =
dc->hwss.is_abm_supported(dc, context, params->streams[i]);
else
@@ -4023,7 +4032,7 @@ static void commit_planes_for_stream(struct dc *dc,
stream_status =
stream_get_status(context, pipe_ctx->stream);
- if (dc->hwss.apply_ctx_for_surface)
+ if (dc->hwss.apply_ctx_for_surface && stream_status)
dc->hwss.apply_ctx_for_surface(
dc, pipe_ctx->stream,
stream_status->plane_count, context);
}
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_state.c
b/drivers/gpu/drm/amd/display/dc/core/dc_state.c
index c75dcdc20428..e990346e51f6 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_state.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_state.c
@@ -794,11 +794,16 @@ enum dc_status dc_state_add_phantom_stream(const struct
dc *dc,
/* setup subvp meta */
main_stream_status = dc_state_get_stream_status(state, main_stream);
+ if (main_stream_status) {
+ main_stream_status->mall_stream_config.type = SUBVP_MAIN;
+ main_stream_status->mall_stream_config.paired_stream =
phantom_stream;
+ }
+
phantom_stream_status = dc_state_get_stream_status(state,
phantom_stream);
- phantom_stream_status->mall_stream_config.type = SUBVP_PHANTOM;
- phantom_stream_status->mall_stream_config.paired_stream = main_stream;
- main_stream_status->mall_stream_config.type = SUBVP_MAIN;
- main_stream_status->mall_stream_config.paired_stream = phantom_stream;
+ if (phantom_stream_status) {
+ phantom_stream_status->mall_stream_config.type = SUBVP_PHANTOM;
+ phantom_stream_status->mall_stream_config.paired_stream =
main_stream;
+ }
return res;
}
@@ -807,14 +812,17 @@ enum dc_status dc_state_remove_phantom_stream(const
struct dc *dc,
struct dc_state *state,
struct dc_stream_state *phantom_stream)
{
- struct dc_stream_status *main_stream_status;
+ struct dc_stream_status *main_stream_status = NULL;
struct dc_stream_status *phantom_stream_status;
/* reset subvp meta */
phantom_stream_status = dc_state_get_stream_status(state,
phantom_stream);
- main_stream_status = dc_state_get_stream_status(state,
phantom_stream_status->mall_stream_config.paired_stream);
- phantom_stream_status->mall_stream_config.type = SUBVP_NONE;
- phantom_stream_status->mall_stream_config.paired_stream = NULL;
+ if (phantom_stream_status) {
+ main_stream_status = dc_state_get_stream_status(state,
phantom_stream_status->mall_stream_config.paired_stream);
+ phantom_stream_status->mall_stream_config.type = SUBVP_NONE;
+ phantom_stream_status->mall_stream_config.paired_stream = NULL;
+ }
+
if (main_stream_status) {
main_stream_status->mall_stream_config.type = SUBVP_NONE;
main_stream_status->mall_stream_config.paired_stream = NULL;
diff --git a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
index 6ff87b023081..b2051c4dd7b6 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
+++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
@@ -562,7 +562,7 @@ static void populate_subvp_cmd_drr_info(struct dc *dc,
{
struct dc_stream_state *phantom_stream =
dc_state_get_paired_subvp_stream(context, subvp_pipe->stream);
struct dc_crtc_timing *main_timing = &subvp_pipe->stream->timing;
- struct dc_crtc_timing *phantom_timing = &phantom_stream->timing;
+ struct dc_crtc_timing *phantom_timing;
struct dc_crtc_timing *drr_timing = &vblank_pipe->stream->timing;
uint16_t drr_frame_us = 0;
uint16_t min_drr_supported_us = 0;
@@ -576,6 +576,11 @@ static void populate_subvp_cmd_drr_info(struct dc *dc,
uint16_t min_vtotal_supported = 0;
uint16_t max_vtotal_supported = 0;
+ if (!phantom_stream)
+ return;
+
+ phantom_timing = &phantom_stream->timing;
+
pipe_data->pipe_config.vblank_data.drr_info.drr_in_use = true;
pipe_data->pipe_config.vblank_data.drr_info.use_ramping = false; // for
now don't use ramping
pipe_data->pipe_config.vblank_data.drr_info.drr_window_size_ms = 4; //
hardcode 4ms DRR window for now
@@ -699,7 +704,13 @@ static void update_subvp_prefetch_end_to_mall_start(struct
dc *dc,
struct dmub_cmd_fw_assisted_mclk_switch_pipe_data_v2 *pipe_data = NULL;
phantom_stream0 = dc_state_get_paired_subvp_stream(context,
subvp_pipes[0]->stream);
+ if (!phantom_stream0)
+ return;
+
phantom_stream1 = dc_state_get_paired_subvp_stream(context,
subvp_pipes[1]->stream);
+ if (!phantom_stream1)
+ return;
+
phantom_timing0 = &phantom_stream0->timing;
phantom_timing1 = &phantom_stream1->timing;
@@ -754,9 +765,14 @@ static void populate_subvp_cmd_pipe_info(struct dc *dc,
&cmd->fw_assisted_mclk_switch_v2.config_data.pipe_data[cmd_pipe_index];
struct dc_stream_state *phantom_stream =
dc_state_get_paired_subvp_stream(context, subvp_pipe->stream);
struct dc_crtc_timing *main_timing = &subvp_pipe->stream->timing;
- struct dc_crtc_timing *phantom_timing = &phantom_stream->timing;
+ struct dc_crtc_timing *phantom_timing;
uint32_t out_num_stream, out_den_stream, out_num_plane, out_den_plane,
out_num, out_den;
+ if (!phantom_stream)
+ return;
+
+ phantom_timing = &phantom_stream->timing;
+
pipe_data->mode = SUBVP;
pipe_data->pipe_config.subvp_data.pix_clk_100hz =
subvp_pipe->stream->timing.pix_clk_100hz;
pipe_data->pipe_config.subvp_data.htotal =
subvp_pipe->stream->timing.h_total;
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
index 5ef10e2b9443..a63b5dcba3f5 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
@@ -738,9 +738,9 @@ static bool subvp_subvp_schedulable(struct dc *dc, struct
dc_state *context)
/* Loop to calculate the maximum microschedule time between the
two SubVP pipes,
* and also to store the two main SubVP pipe pointers in
subvp_pipes[2].
*/
- if (pipe->stream && pipe->plane_state && !pipe->top_pipe &&
+ phantom = dc_state_get_paired_subvp_stream(context,
pipe->stream);
+ if (phantom && pipe->stream && pipe->plane_state &&
!pipe->top_pipe &&
dc_state_get_pipe_subvp_type(context, pipe) ==
SUBVP_MAIN) {
- phantom = dc_state_get_paired_subvp_stream(context,
pipe->stream);
microschedule_lines = (phantom->timing.v_total -
phantom->timing.v_front_porch) +
phantom->timing.v_addressable;
@@ -845,8 +845,8 @@ static bool subvp_drr_schedulable(struct dc *dc, struct
dc_state *context)
}
}
- if (subvp_found && drr_found) {
- phantom_stream = dc_state_get_paired_subvp_stream(context,
pipe->stream);
+ phantom_stream = dc_state_get_paired_subvp_stream(context,
pipe->stream);
+ if (phantom_stream && subvp_found && drr_found) {
main_timing = &pipe->stream->timing;
phantom_timing = &phantom_stream->timing;
drr_timing = &drr_pipe->stream->timing;
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 b97d9abfdbc6..87c7b13391bc 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
@@ -108,6 +108,8 @@ int dml21_find_dc_pipes_for_plane(const struct dc *in_dc,
dc_main_stream = dml_ctx->config.callbacks.get_stream_from_id(context,
main_stream_id);
dc_main_stream_status =
dml_ctx->config.callbacks.get_stream_status(context, dc_main_stream);
+ if (!dc_main_stream_status)
+ return num_pipes;
/* find main plane based on id */
dc_plane_index =
dml21_get_dc_plane_idx_from_plane_id(dml_ctx->v21.dml_to_dc_pipe_mapping.dml_pipe_idx_to_plane_id[dml_plane_idx]);
@@ -325,6 +327,8 @@ static struct dc_stream_state
*dml21_add_phantom_stream(struct dml2_context *dml
struct dml2_stream_parameters *phantom_stream_descriptor =
&stream_programming->phantom_stream.descriptor;
phantom_stream =
dml_ctx->config.svp_pstate.callbacks.create_phantom_stream(dc, context,
main_stream);
+ if (!phantom_stream)
+ return NULL;
/* copy details of phantom stream from main */
memcpy(&phantom_stream->timing, &main_stream->timing,
sizeof(phantom_stream->timing));
@@ -411,7 +415,7 @@ void dml21_handle_phantom_streams_planes(const struct dc
*dc, struct dc_state *c
main_stream_status =
dml_ctx->config.callbacks.get_stream_status(context, main_stream);
- if (main_stream_status->plane_count == 0)
+ if (!main_stream_status ||
main_stream_status->plane_count == 0)
continue;
/* create phantom stream for subvp enabled stream */
@@ -421,6 +425,9 @@ void dml21_handle_phantom_streams_planes(const struct dc
*dc, struct dc_state *c
main_stream,
&dml_ctx->v21.mode_programming.programming->stream_programming[dml_stream_index]);
+ if (!phantom_stream)
+ continue;
+
/* iterate through DML planes associated with this
stream */
for (dml_plane_index = 0; dml_plane_index <
dml_ctx->v21.mode_programming.programming->display_config.num_planes;
dml_plane_index++) {
if
(dml_ctx->v21.mode_programming.programming->plane_programming[dml_plane_index].plane_descriptor->stream_index
== dml_stream_index) {
@@ -509,6 +516,9 @@ void dml21_build_fams2_programming(const struct dc *dc,
break;
case FAMS2_STREAM_TYPE_SUBVP:
phantom_stream =
dml_ctx->config.svp_pstate.callbacks.get_paired_subvp_stream(context, stream);
+ if (!phantom_stream)
+ break;
+
phantom_status =
dml_ctx->config.callbacks.get_stream_status(context, phantom_stream);
/* phantom status should always be present */
diff --git a/drivers/gpu/drm/amd/display/dc/dml2/dml2_dc_resource_mgmt.c
b/drivers/gpu/drm/amd/display/dc/dml2/dml2_dc_resource_mgmt.c
index 23ffecfd70eb..486b222083e0 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2/dml2_dc_resource_mgmt.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2/dml2_dc_resource_mgmt.c
@@ -874,13 +874,14 @@ static unsigned int get_target_odm_factor(
default:
break;
}
- }
- else if (ctx->architecture == dml2_architecture_21) {
+ } else if (ctx->architecture == dml2_architecture_21) {
if
(ctx->config.svp_pstate.callbacks.get_stream_subvp_type(state, stream) ==
SUBVP_PHANTOM) {
struct dc_stream_state *main_stream;
/* get stream id of main stream */
main_stream =
ctx->config.svp_pstate.callbacks.get_paired_subvp_stream(state, stream);
+ if (!main_stream)
+ goto failed;
/* get cfg idx for associated main stream */
cfg_idx = find_disp_cfg_idx_by_stream_id(
@@ -893,6 +894,7 @@ static unsigned int get_target_odm_factor(
return
ctx->v21.mode_programming.programming->stream_programming[cfg_idx].num_odms_required;
}
+failed:
ASSERT(false);
return 1;
}
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c
b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c
index 09376c367c14..1b71cb365aa9 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c
@@ -2051,11 +2051,14 @@ void dcn20_program_front_end_for_ctx(
if (tg->funcs->enable_crtc) {
if (dc->hwss.blank_phantom) {
- int main_pipe_width, main_pipe_height;
+ int main_pipe_width = 0,
main_pipe_height = 0;
struct dc_stream_state *phantom_stream
= dc_state_get_paired_subvp_stream(dc->current_state,
dc->current_state->res_ctx.pipe_ctx[i].stream);
- main_pipe_width =
phantom_stream->dst.width;
- main_pipe_height =
phantom_stream->dst.height;
+ if (phantom_stream) {
+ main_pipe_width =
phantom_stream->dst.width;
+ main_pipe_height =
phantom_stream->dst.height;
+ }
+
dc->hwss.blank_phantom(dc, tg,
main_pipe_width, main_pipe_height);
}
tg->funcs->enable_crtc(tg);
diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c
b/drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c
index 2e1b30a33ea9..969658313fd6 100644
--- a/drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c
@@ -1687,6 +1687,8 @@ static struct dc_stream_state
*dcn32_enable_phantom_stream(struct dc *dc,
struct pipe_ctx *ref_pipe = &context->res_ctx.pipe_ctx[dc_pipe_idx];
phantom_stream = dc_state_create_phantom_stream(dc, context,
ref_pipe->stream);
+ if (!phantom_stream)
+ return phantom_stream;
/* stream has limited viewport and small timing */
memcpy(&phantom_stream->timing, &ref_pipe->stream->timing,
sizeof(phantom_stream->timing));
--
2.45.1
