static int copy_ta_binary()

in amdtee/core.c [171:218]

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

static int copy_ta_binary(struct tee_context *ctx, void *ptr, void **ta,
			  size_t *ta_size)
{
	const struct firmware *fw;
	char fw_name[TA_PATH_MAX];
	struct {
		u32 lo;
		u16 mid;
		u16 hi_ver;
		u8 seq_n[8];
	} *uuid = ptr;
	int n, rc = 0;

	n = snprintf(fw_name, TA_PATH_MAX,
		     "%s/%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x.bin",
		     TA_LOAD_PATH, uuid->lo, uuid->mid, uuid->hi_ver,
		     uuid->seq_n[0], uuid->seq_n[1],
		     uuid->seq_n[2], uuid->seq_n[3],
		     uuid->seq_n[4], uuid->seq_n[5],
		     uuid->seq_n[6], uuid->seq_n[7]);
	if (n < 0 || n >= TA_PATH_MAX) {
		pr_err("failed to get firmware name\n");
		return -EINVAL;
	}

	mutex_lock(&drv_mutex);
	n = request_firmware(&fw, fw_name, &ctx->teedev->dev);
	if (n) {
		pr_err("failed to load firmware %s\n", fw_name);
		rc = -ENOMEM;
		goto unlock;
	}

	*ta_size = roundup(fw->size, PAGE_SIZE);
	*ta = (void *)__get_free_pages(GFP_KERNEL, get_order(*ta_size));
	if (!*ta) {
		pr_err("%s: get_free_pages failed\n", __func__);
		rc = -ENOMEM;
		goto rel_fw;
	}

	memcpy(*ta, fw->data, fw->size);
rel_fw:
	release_firmware(fw);
unlock:
	mutex_unlock(&drv_mutex);
	return rc;
}