From: Lukas Wunner Date: Wed, 8 Jun 2016 16:47:27 +0000 (+0200) Subject: drm/nouveau: Turn off CRTCs on driver unload X-Git-Tag: android-x86-7.1-r1~993^2~11^2~18 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=523872f6b0724ee93d4dad898219306c45c78553;p=android-x86%2Fkernel.git drm/nouveau: Turn off CRTCs on driver unload nouveau leaks a runtime pm ref if at least one CRTC is enabled on unload. The ref is taken by nouveau_crtc_set_config() and held as long as a CRTC is in use. nv04_display_destroy() should solve this by turning off all CRTCs, but (1) nv50_display_destroy() doesn't do the same and (2) it's broken since commit d6bf2f370703 ("drm/nouveau: run mode_config destructor before destroying internal display state") because the crtc structs are torn down by drm_mode_config_cleanup() before being turned off. Also, there's no locking. Move the code to turn off all CRTCs from nv04_display_destroy() to nouveau_display_destroy() so that it's called for both nv04 and nv50 and before drm_mode_config_cleanup(). Use drm_crtc_force_disable_all() helper to save on code and have proper locking. Cc: Ben Skeggs Signed-off-by: Lukas Wunner Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/66daa161322444bbde05d83cb0210b90a66988a4.1465392124.git.lukas@wunner.de --- diff --git a/drivers/gpu/drm/nouveau/dispnv04/disp.c b/drivers/gpu/drm/nouveau/dispnv04/disp.c index aea81a547e85..34c0f2f67548 100644 --- a/drivers/gpu/drm/nouveau/dispnv04/disp.c +++ b/drivers/gpu/drm/nouveau/dispnv04/disp.c @@ -125,18 +125,8 @@ nv04_display_destroy(struct drm_device *dev) struct nv04_display *disp = nv04_display(dev); struct nouveau_drm *drm = nouveau_drm(dev); struct nouveau_encoder *encoder; - struct drm_crtc *crtc; struct nouveau_crtc *nv_crtc; - /* Turn every CRTC off. */ - list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { - struct drm_mode_set modeset = { - .crtc = crtc, - }; - - drm_mode_set_config_internal(&modeset); - } - /* Restore state */ list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.base.head) encoder->enc_restore(&encoder->base.base); diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c index 6072fe292db8..bd8d5bb2c885 100644 --- a/drivers/gpu/drm/nouveau/nouveau_display.c +++ b/drivers/gpu/drm/nouveau/nouveau_display.c @@ -554,6 +554,7 @@ nouveau_display_destroy(struct drm_device *dev) nouveau_display_vblank_fini(dev); drm_kms_helper_poll_fini(dev); + drm_crtc_force_disable_all(dev); drm_mode_config_cleanup(dev); if (disp->dtor)