[PATCH libdrm] amdgpu: only add DRM_RDWR when kernel accept it

[Qiang Yu]

For kernel < 4.6 drm_prime_handle_to_fd_ioctl won't
accept DRM_RDWR.

Sigend-off-by: Qiang Yu <Qiang.Yu at amd.com>
---
 amdgpu/amdgpu_bo.c       | 8 ++++++--
 amdgpu/amdgpu_internal.h | 2 ++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/amdgpu/amdgpu_bo.c b/amdgpu/amdgpu_bo.c
index 9e37b14..17f848f 100644
--- a/amdgpu/amdgpu_bo.c
+++ b/amdgpu/amdgpu_bo.c
@@ -229,6 +229,7 @@ int amdgpu_bo_export(amdgpu_bo_handle bo,
 		     uint32_t *shared_handle)
 {
 	int r;
+	uint32_t flags;
 
 	switch (type) {
 	case amdgpu_bo_handle_type_gem_flink_name:
@@ -246,8 +247,11 @@ int amdgpu_bo_export(amdgpu_bo_handle bo,
 
 	case amdgpu_bo_handle_type_dma_buf_fd:
 		amdgpu_add_handle_to_table(bo);
-		return drmPrimeHandleToFD(bo->dev->fd, bo->handle,
-					  DRM_CLOEXEC | DRM_RDWR,
+		flags = DRM_CLOEXEC;
+		if (AMDGPU_VERSION(bo->dev->major_version, bo->dev->minor_version) >=
+		    AMDGPU_VERSION(3, 1))
+			flags |= DRM_RDWR;
+		return drmPrimeHandleToFD(bo->dev->fd, bo->handle, flags,
 					  (int*)shared_handle);
 	}
 	return -EINVAL;
diff --git a/amdgpu/amdgpu_internal.h b/amdgpu/amdgpu_internal.h
index 99b8ce0..09f5036 100644
--- a/amdgpu/amdgpu_internal.h
+++ b/amdgpu/amdgpu_internal.h
@@ -39,6 +39,8 @@
 #define ROUND_UP(x, y) ((((x)-1) | __round_mask(x, y))+1)
 #define ROUND_DOWN(x, y) ((x) & ~__round_mask(x, y))
 
+#define AMDGPU_VERSION(major, minor) ((major << 16) | minor)
+
 #define AMDGPU_INVALID_VA_ADDRESS	0xffffffffffffffff
 #define AMDGPU_NULL_SUBMIT_SEQ		0
 
-- 
1.9.1