drm_modeset_lock_all() is not needed here, so it is replaced with drm_modeset_lock(). The crtc list around which we are looping never changes, therefore the only lock we need is to protect access to crtc->state.

Suggested-by: Daniel Vetter daniel@ffwll.ch Suggested-by: Matthew Wilcox willy@infradead.org Signed-off-by: Fabio M. De Francesco fmdefrancesco@gmail.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 671ec1002230..bce8f6793d8e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1439,17 +1439,16 @@ static int amdgpu_pmops_runtime_idle(struct device *dev) if (amdgpu_device_has_dc_support(adev)) { struct drm_crtc *crtc;

- drm_modeset_lock_all(drm_dev); - drm_for_each_crtc(crtc, drm_dev) { + drm_modeset_lock(&crtc->mutex, NULL); if (crtc->state->active) { ret = -EBUSY; - break; } + drm_modeset_unlock(&crtc->mutex); + if (ret < 0) + break; }

- drm_modeset_unlock_all(drm_dev); - } else { struct drm_connector *list_connector; struct drm_connector_list_iter iter;