+ /*
+ * Wait for current transmit operation to complete.
+ * Otherwise if some data still exists in Tx FIFO it can be
+ * silently flushed, i.e. dropped on disabling of the controller,
+ * which happens when writing 0 to DW_SPI_SSIENR which happens
+ * in the beginning of new transfer.
+ */
+ if (readl_poll_timeout(priv->regs + DW_SPI_SR, val,
+ (val & SR_TF_EMPT) && !(val & SR_BUSY),
+ RX_TIMEOUT * 1000)) {
+ ret = -ETIMEDOUT;
+ }
+
+ /* Stop the transaction if necessary */
+ if (flags & SPI_XFER_END)
+ external_cs_manage(dev, true);
+