static int cxl_pmem_set_config_data()

in pmem.c [122:158]

• 25 lines of code
• 4 McCabe index (conditional complexity)

static int cxl_pmem_set_config_data(struct cxl_dev_state *cxlds,
				    struct nd_cmd_set_config_hdr *cmd,
				    unsigned int buf_len)
{
	struct cxl_mbox_set_lsa *set_lsa;
	int rc;

	if (sizeof(*cmd) > buf_len)
		return -EINVAL;

	/* 4-byte status follows the input data in the payload */
	if (struct_size(cmd, in_buf, cmd->in_length) + 4 > buf_len)
		return -EINVAL;

	set_lsa =
		kvzalloc(struct_size(set_lsa, data, cmd->in_length), GFP_KERNEL);
	if (!set_lsa)
		return -ENOMEM;

	*set_lsa = (struct cxl_mbox_set_lsa) {
		.offset = cmd->in_offset,
	};
	memcpy(set_lsa->data, cmd->in_buf, cmd->in_length);

	rc = cxl_mbox_send_cmd(cxlds, CXL_MBOX_OP_SET_LSA, set_lsa,
			       struct_size(set_lsa, data, cmd->in_length),
			       NULL, 0);

	/*
	 * Set "firmware" status (4-packed bytes at the end of the input
	 * payload.
	 */
	put_unaligned(0, (u32 *) &cmd->in_buf[cmd->in_length]);
	kvfree(set_lsa);

	return rc;
}