drm/nv04-nv40: Fix NULL dereference when we fail to find an LVDS native mode.

Reported-by: Alex Buell <alex.buell@munted.org.uk>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nv04_dfp.c b/drivers/gpu/drm/nouveau/nv04_dfp.c
index ef23550..c82db37 100644 (file)
--- a/drivers/gpu/drm/nouveau/nv04_dfp.c
+++ b/drivers/gpu/drm/nouveau/nv04_dfp.c
@@ -342,8 +342,8 @@ static void nv04_dfp_mode_set(struct drm_encoder *encoder,
        if (nv_encoder->dcb->type == OUTPUT_LVDS) {
                bool duallink, dummy;
 
-               nouveau_bios_parse_lvds_table(dev, nv_connector->native_mode->
-                                             clock, &duallink, &dummy);
+               nouveau_bios_parse_lvds_table(dev, output_mode->clock,
+                                             &duallink, &dummy);
                if (duallink)
                        regp->fp_control |= (8 << 28);
        } else
@@ -518,8 +518,6 @@ static void nv04_lvds_dpms(struct drm_encoder *encoder, int mode)
                return;
 
        if (nv_encoder->dcb->lvdsconf.use_power_scripts) {
-               struct nouveau_connector *nv_connector = nouveau_encoder_connector_get(nv_encoder);
-
                /* when removing an output, crtc may not be set, but PANEL_OFF
                 * must still be run
                 */
@@ -527,12 +525,8 @@ static void nv04_lvds_dpms(struct drm_encoder *encoder, int mode)
                           nv04_dfp_get_bound_head(dev, nv_encoder->dcb);
 
                if (mode == DRM_MODE_DPMS_ON) {
-                       if (!nv_connector->native_mode) {
-                               NV_ERROR(dev, "Not turning on LVDS without native mode\n");
-                               return;
-                       }
                        call_lvds_script(dev, nv_encoder->dcb, head,
-                                        LVDS_PANEL_ON, nv_connector->native_mode->clock);
+                                        LVDS_PANEL_ON, nv_encoder->mode.clock);
                } else
                        /* pxclk of 0 is fine for PANEL_OFF, and for a
                         * disconnected LVDS encoder there is no native_mode