+/* This function flushes the TX buffer descriptor ring
+ * This function defined as handler is also called while cleaning TXRX
+ * during disconnect/ bss stop.
+ */
+static int mwifiex_clean_pcie_ring_buf(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ u32 rdptr;
+
+ /* Read the TX ring read pointer set by firmware */
+ if (mwifiex_read_reg(adapter, REG_TXBD_RDPTR, &rdptr)) {
+ dev_err(adapter->dev,
+ "Flush TXBD: failed to read REG_TXBD_RDPTR\n");
+ return -1;
+ }
+
+ if (!mwifiex_pcie_txbd_empty(card, rdptr)) {
+ card->txbd_flush = 1;
+ /* write pointer already set at last send
+ * send dnld-rdy intr again, wait for completion.
+ */
+ if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT,
+ CPU_INTR_DNLD_RDY)) {
+ dev_err(adapter->dev,
+ "failed to assert dnld-rdy interrupt.\n");
+ return -1;
+ }
+ }
+ return 0;
+}
+