From: Maíra Canal Date: Mon, 15 May 2023 13:52:03 +0000 (-0300) Subject: drm/vkms: Reduce critical section X-Git-Tag: v6.6-rc1~136^2~21^2~126 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6c494ca6fd820ca6f4329bfbdcd048466dc752e2;p=thirdparty%2Fkernel%2Flinux.git drm/vkms: Reduce critical section The spinlock composer_lock protects the variables crc_pending, wb_pending, frame_start and frame_end, which are variables that are used by the composer worker. There is no need to protect the wb_frame_info information with a spinlock. Therefore, reduce the critical section of the lock by removing the assignments to the wb_frame_info from the critical section. Signed-off-by: Maíra Canal Reviewed-by: Arthur Grillo Signed-off-by: Maíra Canal Link: https://patchwork.freedesktop.org/patch/msgid/20230515135204.115393-2-mcanal@igalia.com --- diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c index 84a51cd281b9c..9a126f678d738 100644 --- a/drivers/gpu/drm/vkms/vkms_writeback.c +++ b/drivers/gpu/drm/vkms/vkms_writeback.c @@ -142,11 +142,13 @@ static void vkms_wb_atomic_commit(struct drm_connector *conn, spin_lock_irq(&output->composer_lock); crtc_state->active_writeback = active_wb; + crtc_state->wb_pending = true; + spin_unlock_irq(&output->composer_lock); + wb_frame_info->offset = fb->offsets[0]; wb_frame_info->pitch = fb->pitches[0]; wb_frame_info->cpp = fb->format->cpp[0]; - crtc_state->wb_pending = true; - spin_unlock_irq(&output->composer_lock); + drm_writeback_queue_job(wb_conn, connector_state); active_wb->wb_write = get_line_to_frame_function(wb_format); drm_rect_init(&wb_frame_info->src, 0, 0, crtc_width, crtc_height);