On 2023-08-08 16:57, Atul Raut wrote:
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))
You have a typo in the variable name here. Did you at least compile-test
the patch?
+ return ERR_PTR(queue_ids);
I think it should just return queue_ids here. That's already an ERR_PTR
in case of errors. So you don't even need the "if". Just this should do
the job:
return memdup_user(usr_queue_id_array, array_size);
The error checking is done by the caller.
Regards,
Felix
return queue_ids;
}
