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drm/amdgpu:fix virtual dce bug
[ Upstream commit 129d65c18e
]
this fix the issue that access memory after freed
after driver unloaded.
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
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commit
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1 changed files with 3 additions and 1 deletions
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@ -437,6 +437,8 @@ static int dce_virtual_sw_fini(void *handle)
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drm_kms_helper_poll_fini(adev->ddev);
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drm_mode_config_cleanup(adev->ddev);
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/* clear crtcs pointer to avoid dce irq finish routine access freed data */
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memset(adev->mode_info.crtcs, 0, sizeof(adev->mode_info.crtcs[0]) * AMDGPU_MAX_CRTCS);
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adev->mode_info.mode_config_initialized = false;
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return 0;
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}
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@ -723,7 +725,7 @@ static void dce_virtual_set_crtc_vblank_interrupt_state(struct amdgpu_device *ad
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int crtc,
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enum amdgpu_interrupt_state state)
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{
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if (crtc >= adev->mode_info.num_crtc) {
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if (crtc >= adev->mode_info.num_crtc || !adev->mode_info.crtcs[crtc]) {
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DRM_DEBUG("invalid crtc %d\n", crtc);
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return;
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}
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