On Sat, 2024-08-31 at 18:29 +0800, Jinjie Ruan wrote:
> Switching to memdup_user(), which combines kmalloc() and copy_from_user(),
> and it can simplfy code.
>
Reviewed-by: Frank Binns <frank.bi...@imgtec.com>
> Signed-off-by: Jinjie Ruan <ruanjin...@huawei.com>
> ---
> drivers/gpu/drm/imagination/pvr_job.c | 13 +++----------
> 1 file changed, 3 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/imagination/pvr_job.c
> b/drivers/gpu/drm/imagination/pvr_job.c
> index 78c2f3c6dce0..618503a212a7 100644
> --- a/drivers/gpu/drm/imagination/pvr_job.c
> +++ b/drivers/gpu/drm/imagination/pvr_job.c
> @@ -90,20 +90,13 @@ static int pvr_fw_cmd_init(struct pvr_device *pvr_dev,
> struct pvr_job *job,
> void *stream;
> int err;
>
> - stream = kzalloc(stream_len, GFP_KERNEL);
> - if (!stream)
> - return -ENOMEM;
> -
> - if (copy_from_user(stream, u64_to_user_ptr(stream_userptr),
> stream_len)) {
> - err = -EFAULT;
> - goto err_free_stream;
> - }
> + stream = memdup_user(u64_to_user_ptr(stream_userptr), stream_len);
> + if (IS_ERR(stream))
> + return PTR_ERR(stream);
>
> err = pvr_job_process_stream(pvr_dev, stream_def, stream, stream_len,
> job);
>
> -err_free_stream:
> kfree(stream);
> -
> return err;
> }
>
