[PATCH] radeon: Fix KMS CP writeback on big endian machines.

[Cédric Cano]

Hi,

The following patch fixes interrupt acknowledge when write-back is 
enabled on big endian platform.

The same should be applied on evergreen.

Cedric

Signed-off-by: Cedric Cano<ccano at interfaceconcept.com>
---
diff -Naur linux-2.6.38.2/drivers/gpu/drm/radeon/r600.c 
linux-2.6.38.2/drivers/gpu/drm/radeon/r600.c
--- linux-2.6.38.2/drivers/gpu/drm/radeon/r600.c    2011-04-19 
09:52:13.000000000 +0200
+++ linux-2.6.38.2/drivers/gpu/drm/radeon/r600.c    2011-03-27 
20:37:20.000000000 +0200
@@ -3227,7 +3227,7 @@
      u32 wptr, tmp;

      if (rdev->wb.enabled)
-        wptr = le32_to_cpu(rdev->wb.wb[R600_WB_IH_WPTR_OFFSET/4]);
+        wptr = rdev->wb.wb[R600_WB_IH_WPTR_OFFSET/4];
      else
          wptr = RREG32(IH_RB_WPTR);