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drm/amd/display: Fix potential memory leak in DMUB hw_init

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[Why]
On resume we perform DMUB hw_init which allocates memory:
dm_resume->dm_dmub_hw_init->dc_dmub_srv_create->kzalloc
That results in memory leak in suspend/resume scenarios.

[How]
Allocate memory for the DC wrapper to DMUB only if it was not
allocated before.
No need to reallocate it on suspend/resume.

Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Roman Li 2021-05-10 11:58:54 -04:00 committed by Alex Deucher
parent dce3d8e1d0
commit c5699e2d86
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -925,7 +925,8 @@ static int dm_dmub_hw_init(struct amdgpu_device *adev)
abm->dmcu_is_running = dmcu->funcs->is_dmcu_initialized(dmcu);
}
adev->dm.dc->ctx->dmub_srv = dc_dmub_srv_create(adev->dm.dc, dmub_srv);
if (!adev->dm.dc->ctx->dmub_srv)
adev->dm.dc->ctx->dmub_srv = dc_dmub_srv_create(adev->dm.dc, dmub_srv);
if (!adev->dm.dc->ctx->dmub_srv) {
DRM_ERROR("Couldn't allocate DC DMUB server!\n");
return -ENOMEM;
@ -1954,7 +1955,6 @@ static int dm_suspend(void *handle)
amdgpu_dm_irq_suspend(adev);
dc_set_power_state(dm->dc, DC_ACPI_CM_POWER_STATE_D3);
return 0;