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Date: Tue, 28 May 2024 13:51:18 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: Harry Wentland <harry.wentland@....com>,
Leo Li <sunpeng.li@....com>,
Rodrigo Siqueira <Rodrigo.Siqueira@....com>
Cc: Arnd Bergmann <arnd@...db.de>,
Alex Deucher <alexander.deucher@....com>,
Christian König <christian.koenig@....com>,
"Pan, Xinhui" <Xinhui.Pan@....com>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Wenjing Liu <wenjing.liu@....com>,
Alvin Lee <alvin.lee2@....com>,
Jun Lei <jun.lei@....com>,
Hamza Mahfooz <hamza.mahfooz@....com>,
Aurabindo Pillai <aurabindo.pillai@....com>,
Dillon Varone <dillon.varone@....com>,
Qingqing Zhuo <Qingqing.Zhuo@....com>,
Roman Li <roman.li@....com>,
Aric Cyr <aric.cyr@....com>,
Joshua Aberback <joshua.aberback@....com>,
amd-gfx@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] [RESEND] drm/amd/display: dynamically allocate dml2_configuration_options structures
From: Arnd Bergmann <arnd@...db.de>
This structure is too large to fit on a stack, as shown by the
newly introduced warnings from a recent code change:
drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn32/dcn32_resource.c: In function 'dcn32_update_bw_bounding_box':
drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn32/dcn32_resource.c:2019:1: error: the frame size of 1180 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn321/dcn321_resource.c: In function 'dcn321_update_bw_bounding_box':
drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn321/dcn321_resource.c:1597:1: error: the frame size of 1180 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_state.c: In function 'dc_state_create':
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_state.c:219:1: error: the frame size of 1184 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
Instead of open-coding the assignment of a large structure to a stack
variable, use an explicit kmemdup() in each case to move it off the stack.
Fixes: e779f4587f61 ("drm/amd/display: Add handling for DC power mode")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
Originally sent as https://lore.kernel.org/all/20240418083421.3956461-1-arnd@kernel.org/
---
.../display/dc/resource/dcn32/dcn32_resource.c | 16 +++++++++++-----
.../display/dc/resource/dcn321/dcn321_resource.c | 16 +++++++++++-----
2 files changed, 22 insertions(+), 10 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 022d320be1d5..0f11d7c8791c 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
@@ -2007,21 +2007,27 @@ 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 = dc->dml2_options;
+ struct dml2_configuration_options *dml2_opt;
+
+ dml2_opt = kmemdup(&dc->dml2_options, sizeof(dc->dml2_options), GFP_KERNEL);
+ if (!dml2_opt)
+ return;
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 e4b360d89b3b..07ca6f58447d 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
@@ -1581,21 +1581,27 @@ 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 = dc->dml2_options;
+ struct dml2_configuration_options *dml2_opt;
+
+ dml2_opt = kmemdup(&dc->dml2_options, sizeof(dc->dml2_options), GFP_KERNEL);
+ if (!dml2_opt)
+ return;
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 = {
--
2.39.2
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