…
> +++ b/drivers/accel/amdxdna/amdxdna_mailbox.c
> @@ -0,0 +1,582 @@
…
> +int xdna_mailbox_send_msg(struct mailbox_channel *mb_chann,
> +                       const struct xdna_mailbox_msg *msg, u64 tx_timeout)
> +{
> +     struct xdna_msg_header *header;
> +     struct mailbox_msg *mb_msg;

I propose to take another software design option better into account
also according to the application of scope-based resource management.

* You may reduce the scopes of such local variables.

* Would you like to use the attribute “__free(kfree)” accordingly?
  https://elixir.bootlin.com/linux/v6.10/source/include/linux/slab.h#L282

…
> +     mb_msg = kzalloc(sizeof(*mb_msg) + pkg_size, GFP_KERNEL);
…


Regards,
Markus

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