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drm/amd/display: Fix memleaks when atomic check fails. 

While checking plane states for updates during atomic check, we create
dc_plane_states in preparation. These dc states should be freed if
something errors.

Although the input transfer function is also freed by
dc_plane_state_release(), we should free it (on error) under the same
scope as where it is created.

Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Leo (Sunpeng) Li 2018-02-20 15:46:09 -05:00 committed by Alex Deucher
parent d179664a2a
commit 8c45c5db84
1 changed files with 28 additions and 12 deletions
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40
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -1982,6 +1982,10 @@ static int fill_plane_attributes(struct amdgpu_device *adev,
* every time.
*/
ret = amdgpu_dm_set_degamma_lut(crtc_state, dc_plane_state);
if (ret) {
dc_transfer_func_release(dc_plane_state->in_transfer_func);
dc_plane_state->in_transfer_func = NULL;
}
return ret;
}
@ -4737,6 +4741,7 @@ static int dm_update_planes_state(struct dc *dc,
*lock_and_validation_needed = true;
} else { /* Add new planes */
struct dc_plane_state *dc_new_plane_state;
if (drm_atomic_plane_disabling(plane->state, new_plane_state))
continue;
@ -4755,34 +4760,45 @@ static int dm_update_planes_state(struct dc *dc,
WARN_ON(dm_new_plane_state->dc_state);
dm_new_plane_state->dc_state = dc_create_plane_state(dc);
dc_new_plane_state = dc_create_plane_state(dc);
if (!dc_new_plane_state) {
ret = -EINVAL;
return ret;
}
DRM_DEBUG_DRIVER("Enabling DRM plane: %d on DRM crtc %d\n",
plane->base.id, new_plane_crtc->base.id);
if (!dm_new_plane_state->dc_state) {
ret = -EINVAL;
ret = fill_plane_attributes(
new_plane_crtc->dev->dev_private,
dc_new_plane_state,
new_plane_state,
new_crtc_state);
if (ret) {
dc_plane_state_release(dc_new_plane_state);
return ret;
}
ret = fill_plane_attributes(
new_plane_crtc->dev->dev_private,
dm_new_plane_state->dc_state,
new_plane_state,
new_crtc_state);
if (ret)
return ret;
/*
* Any atomic check errors that occur after this will
* not need a release. The plane state will be attached
* to the stream, and therefore part of the atomic
* state. It'll be released when the atomic state is
* cleaned.
*/
if (!dc_add_plane_to_context(
dc,
dm_new_crtc_state->stream,
dm_new_plane_state->dc_state,
dc_new_plane_state,
dm_state->context)) {
dc_plane_state_release(dc_new_plane_state);
ret = -EINVAL;
return ret;
}
dm_new_plane_state->dc_state = dc_new_plane_state;
/* Tell DC to do a full surface update every time there
* is a plane change. Inefficient, but works for now.
*/