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 Reviewed-by: Matthew Wilcox (Oracle) willy@infradead.org ---

Changes from v2: Drop file name from the Subject. Cc'ed all maintainers. Changes from v1: Removed unnecessary braces around single statement block.

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 671ec1002230..adfeec2b17c0 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1439,17 +1439,15 @@ 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) { - if (crtc->state->active) { + drm_modeset_lock(&crtc->mutex, NULL); + if (crtc->state->active) ret = -EBUSY; + 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;