drm/radeon: fix semaphore value init

commit f229407da79315c18a2f25f485e1a1b9fdda1e92 upstream.

Semaphore values have 64 bits, not 32. This fixes a very subtle bug
that disables synchronization when the upper 32bits wasn't zero.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-By: Grigori Goronzy <greg@chown.ath.cx>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/radeon/radeon_semaphore.c b/drivers/gpu/drm/radeon/radeon_semaphore.c
index 9006b32..eb7b600 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_semaphore.c
+++ b/drivers/gpu/drm/radeon/radeon_semaphore.c
@@ -34,7 +34,7 @@
 int radeon_semaphore_create(struct radeon_device *rdev,
                            struct radeon_semaphore **semaphore)
 {
-       uint32_t *cpu_addr;
+       uint64_t *cpu_addr;
        int i, r;
 
        *semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL);