int cxl_mbox_send_cmd()

in core/mbox.c [152:184]

• 23 lines of code
• 6 McCabe index (conditional complexity)

int cxl_mbox_send_cmd(struct cxl_dev_state *cxlds, u16 opcode, void *in,
		      size_t in_size, void *out, size_t out_size)
{
	const struct cxl_mem_command *cmd = cxl_mem_find_command(opcode);
	struct cxl_mbox_cmd mbox_cmd = {
		.opcode = opcode,
		.payload_in = in,
		.size_in = in_size,
		.size_out = out_size,
		.payload_out = out,
	};
	int rc;

	if (out_size > cxlds->payload_size)
		return -E2BIG;

	rc = cxlds->mbox_send(cxlds, &mbox_cmd);
	if (rc)
		return rc;

	/* TODO: Map return code to proper kernel style errno */
	if (mbox_cmd.return_code != CXL_MBOX_SUCCESS)
		return -ENXIO;

	/*
	 * Variable sized commands can't be validated and so it's up to the
	 * caller to do that if they wish.
	 */
	if (cmd->info.size_out >= 0 && mbox_cmd.size_out != out_size)
		return -EIO;

	return 0;
}