[PATCH 1/3] amdkfd: Don't clear *kfd2kgd on kfd_module_init

[Oded Gabbay]

When amdkfd and radeon are compiled inside the kernel image (not as modules),
radeon will load before amdkfd and will set *kfd2kgd to its interface
structure. Therefore, we must not set *kfd2kgd to NULL when amdkfd is loaded
because it will override radeon's initialization and cause kernel BUG.

Signed-off-by: Oded Gabbay <oded.gabbay at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_module.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_module.c 
b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
index 95d5af1..236562f 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_module.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
@@ -34,7 +34,7 @@
 #define KFD_DRIVER_MINOR       7
 #define KFD_DRIVER_PATCHLEVEL  0

-const struct kfd2kgd_calls *kfd2kgd;
+const struct kfd2kgd_calls *kfd2kgd = NULL;
 static const struct kgd2kfd_calls kgd2kfd = {
        .exit           = kgd2kfd_exit,
        .probe          = kgd2kfd_probe,
@@ -84,14 +84,13 @@ EXPORT_SYMBOL(kgd2kfd_init);

 void kgd2kfd_exit(void)
 {
+       kfd2kgd = NULL;
 }

 static int __init kfd_module_init(void)
 {
        int err;

-       kfd2kgd = NULL;
-
        /* Verify module parameters */
        if ((sched_policy < KFD_SCHED_POLICY_HWS) ||
                (sched_policy > KFD_SCHED_POLICY_NO_HWS)) {
-- 
2.1.0