drm/radeon: disable CIK CP semaphores for now

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Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=99b4f25122f43210278cde17a9d100906235a074
Commit:     99b4f25122f43210278cde17a9d100906235a074
Parent:     1654b817d8f5f1c27ebc98773fe0e517b0ba2f1e
Author:     Christian König <christian.koenig at amd.com>
AuthorDate: Tue Nov 12 12:58:06 2013 +0100
Committer:  Alex Deucher <alexander.deucher at amd.com>
CommitDate: Fri Nov 15 15:56:16 2013 -0500

    drm/radeon: disable CIK CP semaphores for now
    
    Signed-off-by: Christian König <christian.koenig at amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
    Cc: stable at vger.kernel.org
---
 drivers/gpu/drm/radeon/cik.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index 811fc1b..c169897 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -3561,6 +3561,8 @@ bool cik_semaphore_ring_emit(struct radeon_device *rdev,
 			     struct radeon_semaphore *semaphore,
 			     bool emit_wait)
 {
+/* TODO: figure out why semaphore cause lockups */
+#if 0
 	uint64_t addr = semaphore->gpu_addr;
 	unsigned sel = emit_wait ? PACKET3_SEM_SEL_WAIT : PACKET3_SEM_SEL_SIGNAL;
 
@@ -3569,6 +3571,9 @@ bool cik_semaphore_ring_emit(struct radeon_device *rdev,
 	radeon_ring_write(ring, (upper_32_bits(addr) & 0xffff) | sel);
 
 	return true;
+#else
+	return false;
+#endif
 }
 
 /**