[PATCH] drm/radeon: Only call drm_vblank_on/off between drm_vblank_init/cleanup

[Michel Dänzer]

From: Michel Dänzer <michel.daen...@amd.com>

Prevents the

        if (WARN_ON(pipe >= dev->num_crtcs))

in drm_vblank_on/off from triggering if acceleration fails to
initialize, in which case we call drm_vblank_cleanup.

Reported-and-Tested-by: Julian Margetson <runaway at candw.ms>
Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
---
 drivers/gpu/drm/radeon/atombios_crtc.c      | 6 ++++--
 drivers/gpu/drm/radeon/radeon_legacy_crtc.c | 6 ++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c 
b/drivers/gpu/drm/radeon/atombios_crtc.c
index cf61e08..b80b08f 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -275,13 +275,15 @@ void atombios_crtc_dpms(struct drm_crtc *crtc, int mode)
                if (ASIC_IS_DCE3(rdev) && !ASIC_IS_DCE6(rdev))
                        atombios_enable_crtc_memreq(crtc, ATOM_ENABLE);
                atombios_blank_crtc(crtc, ATOM_DISABLE);
-               drm_vblank_on(dev, radeon_crtc->crtc_id);
+               if (dev->num_crtcs > radeon_crtc->crtc_id)
+                       drm_vblank_on(dev, radeon_crtc->crtc_id);
                radeon_crtc_load_lut(crtc);
                break;
        case DRM_MODE_DPMS_STANDBY:
        case DRM_MODE_DPMS_SUSPEND:
        case DRM_MODE_DPMS_OFF:
-               drm_vblank_off(dev, radeon_crtc->crtc_id);
+               if (dev->num_crtcs > radeon_crtc->crtc_id)
+                       drm_vblank_off(dev, radeon_crtc->crtc_id);
                if (radeon_crtc->enabled)
                        atombios_blank_crtc(crtc, ATOM_ENABLE);
                if (ASIC_IS_DCE3(rdev) && !ASIC_IS_DCE6(rdev))
diff --git a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c 
b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
index 24152df..478d409 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
@@ -331,13 +331,15 @@ static void radeon_crtc_dpms(struct drm_crtc *crtc, int 
mode)
                                                                         
RADEON_CRTC_DISP_REQ_EN_B));
                        WREG32_P(RADEON_CRTC_EXT_CNTL, crtc_ext_cntl, ~(mask | 
crtc_ext_cntl));
                }
-               drm_vblank_on(dev, radeon_crtc->crtc_id);
+               if (dev->num_crtcs > radeon_crtc->crtc_id)
+                       drm_vblank_on(dev, radeon_crtc->crtc_id);
                radeon_crtc_load_lut(crtc);
                break;
        case DRM_MODE_DPMS_STANDBY:
        case DRM_MODE_DPMS_SUSPEND:
        case DRM_MODE_DPMS_OFF:
-               drm_vblank_off(dev, radeon_crtc->crtc_id);
+               if (dev->num_crtcs > radeon_crtc->crtc_id)
+                       drm_vblank_off(dev, radeon_crtc->crtc_id);
                if (radeon_crtc->crtc_id)
                        WREG32_P(RADEON_CRTC2_GEN_CNTL, mask, ~(RADEON_CRTC2_EN 
| mask));
                else {
-- 
2.8.0.rc3