[PATCH 4/5] drm/radeon/r5xx-r7xx: don't use radeon_crtc for vblank callback (v2)

[alexdeuc...@gmail.com]

From: Alex Deucher <alexander.deuc...@amd.com>

This might be called before we've allocated the radeon_crtcs

v2: fix typo in array size

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/radeon/rs600.c |   16 ++++++++++++----
 1 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c
index 5301b3d..31b84b6 100644
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -46,19 +46,27 @@
 void rs600_gpu_init(struct radeon_device *rdev);
 int rs600_mc_wait_for_idle(struct radeon_device *rdev);

+static const u32 crtc_offsets[2] =
+{
+       0,
+       AVIVO_D2CRTC_H_TOTAL - AVIVO_D1CRTC_H_TOTAL
+};
+
 void avivo_wait_for_vblank(struct radeon_device *rdev, int crtc)
 {
-       struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc];
        int i;

-       if (RREG32(AVIVO_D1CRTC_CONTROL + radeon_crtc->crtc_offset) & 
AVIVO_CRTC_EN) {
+       if (crtc >= rdev->num_crtc)
+               return;
+
+       if (RREG32(AVIVO_D1CRTC_CONTROL + crtc_offsets[crtc]) & AVIVO_CRTC_EN) {
                for (i = 0; i < rdev->usec_timeout; i++) {
-                       if (!(RREG32(AVIVO_D1CRTC_STATUS + 
radeon_crtc->crtc_offset) & AVIVO_D1CRTC_V_BLANK))
+                       if (!(RREG32(AVIVO_D1CRTC_STATUS + crtc_offsets[crtc]) 
& AVIVO_D1CRTC_V_BLANK))
                                break;
                        udelay(1);
                }
                for (i = 0; i < rdev->usec_timeout; i++) {
-                       if (RREG32(AVIVO_D1CRTC_STATUS + 
radeon_crtc->crtc_offset) & AVIVO_D1CRTC_V_BLANK)
+                       if (RREG32(AVIVO_D1CRTC_STATUS + crtc_offsets[crtc]) & 
AVIVO_D1CRTC_V_BLANK)
                                break;
                        udelay(1);
                }
-- 
1.7.7.5