+ struct nci_spi_dev *ndev = nci_get_drvdata(nci_dev);
+ unsigned int payload_len = skb->len;
+ unsigned char *hdr;
+ int ret;
+ long completion_rc;
+
+ ndev->ops->deassert_int(ndev);
+
+ /* add the NCI SPI header to the start of the buffer */
+ hdr = skb_push(skb, NCI_SPI_HDR_LEN);
+ hdr[0] = NCI_SPI_DIRECT_WRITE;
+ hdr[1] = ndev->acknowledge_mode;
+ hdr[2] = payload_len >> 8;
+ hdr[3] = payload_len & 0xFF;
+
+ if (ndev->acknowledge_mode == NCI_SPI_CRC_ENABLED) {
+ u16 crc;
+
+ crc = crc_ccitt(CRC_INIT, skb->data, skb->len);
+ *skb_put(skb, 1) = crc >> 8;
+ *skb_put(skb, 1) = crc & 0xFF;
+ }
+
+ ret = __nci_spi_send(ndev, skb);
+
+ kfree_skb(skb);
+ ndev->ops->assert_int(ndev);
+
+ if (ret != 0 || ndev->acknowledge_mode == NCI_SPI_CRC_DISABLED)
+ goto done;
+
+ init_completion(&ndev->req_completion);
+ completion_rc =
+ wait_for_completion_interruptible_timeout(&ndev->req_completion,
+ NCI_SPI_SEND_TIMEOUT);
+
+ if (completion_rc <= 0 || ndev->req_result == ACKNOWLEDGE_NACK)
+ ret = -EIO;
+
+done:
+ return ret;