drm/amdkfd: Use memdup_user() rather than duplicating its

[Atul Raut]

To prevent its redundant implementation and streamline
code, use memdup_user.

This fixes warnings reported by Coccinelle:
./drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c:2811:13-20: WARNING 
opportunity for memdup_user

Signed-off-by: Atul Raut <rauji.r...@gmail.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c 
b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
index 2df153828ff4..51740e007e89 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -2808,12 +2808,9 @@ static uint32_t *get_queue_ids(uint32_t num_queues, 
uint32_t *usr_queue_id_array
        if (!usr_queue_id_array)
                return NULL;
 
-       queue_ids = kzalloc(array_size, GFP_KERNEL);
-       if (!queue_ids)
-               return ERR_PTR(-ENOMEM);
-
-       if (copy_from_user(queue_ids, usr_queue_id_array, array_size))
-               return ERR_PTR(-EFAULT);
+       queue_ids = memdup_user(usr_queue_id_array, array_size);
+       if (IS_ERR(Iqueue_ids))
+               return ERR_PTR(queue_ids);
 
        return queue_ids;
 }
-- 
2.34.1