Messages in this thread | | | Subject | Re: [PATCH] drm: Fix wrong use of connector in vop_get_edp_connector | From | He Ying <> | Date | Tue, 9 Nov 2021 10:06:07 +0800 |
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kindly ping...
在 2021/10/25 9:55, He Ying 写道: > >From the comments of drm_for_each_connector_iter(), we know > that "connector is only valid within the list body, if you > want to use connector after calling drm_connector_list_iter_end() > then you need to grab your own reference first using > drm_connector_get()". So fix the wrong use of connector > according to the comments and then call drm_connector_put() > after using connector finishes. > > Signed-off-by: He Ying <heying24@huawei.com> > Fixes: 2cbeb64f6c70 ("drm/rockchip: use drm_for_each_connector_iter()") > --- > drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 9 +++++---- > 1 file changed, 5 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c > index a25b98b7f5bd..469922ad29fa 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c > @@ -1581,19 +1581,19 @@ static void vop_crtc_reset(struct drm_crtc *crtc) > #ifdef CONFIG_DRM_ANALOGIX_DP > static struct drm_connector *vop_get_edp_connector(struct vop *vop) > { > - struct drm_connector *connector; > + struct drm_connector *connector = NULL; > struct drm_connector_list_iter conn_iter; > > drm_connector_list_iter_begin(vop->drm_dev, &conn_iter); > drm_for_each_connector_iter(connector, &conn_iter) { > if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) { > - drm_connector_list_iter_end(&conn_iter); > - return connector; > + drm_connector_get(connector); > + break; > } > } > drm_connector_list_iter_end(&conn_iter); > > - return NULL; > + return connector; > } > > static int vop_crtc_set_crc_source(struct drm_crtc *crtc, > @@ -1614,6 +1614,7 @@ static int vop_crtc_set_crc_source(struct drm_crtc *crtc, > else > ret = -EINVAL; > > + drm_connector_put(connector); > return ret; > } >
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