linux-kernel - [68/70] radeon: Fix KMS CP writeback on big endian machines.

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Date:	Tue, 19 Apr 2011 13:09:17 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Michel DÃ€nzer <daenzer@...are.com>,
	Dave Airlie <airlied@...hat.com>
Subject: [68/70] radeon: Fix KMS CP writeback on big endian machines.

2.6.38-stable review patch.  If anyone has any objections, please let us know.

------------------

From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <daenzer@...are.com>

commit dc66b325f161bb651493c7d96ad44876b629cf6a upstream.

This is necessary even with PCI(e) GART, and it makes writeback work even with
AGP on my PowerBook. Might still be unreliable with older revisions of UniNorth
and other AGP bridges though.

Signed-off-by: Michel Dänzer <daenzer@...are.com>
Reviewed-by: Alex Deucher <alex.deucher@...il.com>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/gpu/drm/radeon/radeon_fence.c |    2 +-
 drivers/gpu/drm/radeon/radeon_ring.c  |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -80,7 +80,7 @@ static bool radeon_fence_poll_locked(str
 			scratch_index = R600_WB_EVENT_OFFSET + rdev->fence_drv.scratch_reg - rdev->scratch.reg_base;
 		else
 			scratch_index = RADEON_WB_SCRATCH_OFFSET + rdev->fence_drv.scratch_reg - rdev->scratch.reg_base;
-		seq = rdev->wb.wb[scratch_index/4];
+		seq = le32_to_cpu(rdev->wb.wb[scratch_index/4]);
 	} else
 		seq = RREG32(rdev->fence_drv.scratch_reg);
 	if (seq != rdev->fence_drv.last_seq) {
--- a/drivers/gpu/drm/radeon/radeon_ring.c
+++ b/drivers/gpu/drm/radeon/radeon_ring.c
@@ -248,7 +248,7 @@ void radeon_ib_pool_fini(struct radeon_d
 void radeon_ring_free_size(struct radeon_device *rdev)
 {
 	if (rdev->wb.enabled)
-		rdev->cp.rptr = rdev->wb.wb[RADEON_WB_CP_RPTR_OFFSET/4];
+		rdev->cp.rptr = le32_to_cpu(rdev->wb.wb[RADEON_WB_CP_RPTR_OFFSET/4]);
 	else {
 		if (rdev->family >= CHIP_R600)
 			rdev->cp.rptr = RREG32(R600_CP_RB_RPTR);


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