[PATCH] Revert "drm/amd/display: dynamically allocate dml2_configuration_options structures"

[George Zhang]

This reverts commit 416b5c5eec9e708b31c68f00cb79130f2cfaf7ed.

This patch caused a regression on DCN 3.2 on the IGT test assr-links-suspend, with
the dmesg warning:

BUG: sleeping function called from invalid context at include/linux/sched/mm.h:306
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 449, name: kworker/u64:8
preempt_count: 2, expected: 0
RCU nest depth: 0, expected: 0
Preemption disabled at:
ffffffffc0ce1580>] dc_fpu_begin+0x30/0xd0 [amdgpu]
CPU: 5 PID: 449 Comm: kworker/u64:8 Tainted: G        W          6.8.0+ #35
Hardware name: System manufacturer System Product Name/ROG STRIX X570-E GAMING WIFI II, BIOS 4204 02/24/2022
Workqueue: events_unbound async_run_entry_fn

Reverting this patch will re-introduce stack size warnings.

Cc: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: George Zhang <george.zhang at amd.com>
---
 .../display/dc/resource/dcn32/dcn32_resource.c   | 16 +++++-----------
 .../display/dc/resource/dcn321/dcn321_resource.c | 16 +++++-----------
 2 files changed, 10 insertions(+), 22 deletions(-)

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 0f11d7c8791c..022d320be1d5 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
@@ -2007,27 +2007,21 @@ void dcn32_calculate_wm_and_dlg(struct dc *dc, struct dc_state *context,
 
 static void dcn32_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_params)
 {
-	struct dml2_configuration_options *dml2_opt;
-
-	dml2_opt = kmemdup(&dc->dml2_options, sizeof(dc->dml2_options), GFP_KERNEL);
-	if (!dml2_opt)
-		return;
+	struct dml2_configuration_options dml2_opt = dc->dml2_options;
 
 	DC_FP_START();
 
 	dcn32_update_bw_bounding_box_fpu(dc, bw_params);
 
-	dml2_opt->use_clock_dc_limits = false;
+	dml2_opt.use_clock_dc_limits = false;
 	if (dc->debug.using_dml2 && dc->current_state && dc->current_state->bw_ctx.dml2)
-		dml2_reinit(dc, dml2_opt, &dc->current_state->bw_ctx.dml2);
+		dml2_reinit(dc, &dml2_opt, &dc->current_state->bw_ctx.dml2);
 
-	dml2_opt->use_clock_dc_limits = true;
+	dml2_opt.use_clock_dc_limits = true;
 	if (dc->debug.using_dml2 && dc->current_state && dc->current_state->bw_ctx.dml2_dc_power_source)
-		dml2_reinit(dc, dml2_opt, &dc->current_state->bw_ctx.dml2_dc_power_source);
+		dml2_reinit(dc, &dml2_opt, &dc->current_state->bw_ctx.dml2_dc_power_source);
 
 	DC_FP_END();
-
-	kfree(dml2_opt);
 }
 
 static struct resource_funcs dcn32_res_pool_funcs = {
diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c
index 07ca6f58447d..e4b360d89b3b 100644
--- a/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c
@@ -1581,27 +1581,21 @@ static struct dc_cap_funcs cap_funcs = {
 
 static void dcn321_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_params)
 {
-	struct dml2_configuration_options *dml2_opt;
-
-	dml2_opt = kmemdup(&dc->dml2_options, sizeof(dc->dml2_options), GFP_KERNEL);
-	if (!dml2_opt)
-		return;
+	struct dml2_configuration_options dml2_opt = dc->dml2_options;
 
 	DC_FP_START();
 
 	dcn321_update_bw_bounding_box_fpu(dc, bw_params);
 
-	dml2_opt->use_clock_dc_limits = false;
+	dml2_opt.use_clock_dc_limits = false;
 	if (dc->debug.using_dml2 && dc->current_state && dc->current_state->bw_ctx.dml2)
-		dml2_reinit(dc, dml2_opt, &dc->current_state->bw_ctx.dml2);
+		dml2_reinit(dc, &dml2_opt, &dc->current_state->bw_ctx.dml2);
 
-	dml2_opt->use_clock_dc_limits = true;
+	dml2_opt.use_clock_dc_limits = true;
 	if (dc->debug.using_dml2 && dc->current_state && dc->current_state->bw_ctx.dml2_dc_power_source)
-		dml2_reinit(dc, dml2_opt, &dc->current_state->bw_ctx.dml2_dc_power_source);
+		dml2_reinit(dc, &dml2_opt, &dc->current_state->bw_ctx.dml2_dc_power_source);
 
 	DC_FP_END();
-
-	kfree(dml2_opt);
 }
 
 static struct resource_funcs dcn321_res_pool_funcs = {
-- 
2.34.1