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path: root/drivers/nfc/trf7970a.c
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Diffstat (limited to 'drivers/nfc/trf7970a.c')
-rw-r--r--drivers/nfc/trf7970a.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index 6d2b06ddf191..8c00827893f1 100644
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c
@@ -648,6 +648,21 @@ static void trf7970a_drain_fifo(struct trf7970a *trf, u8 status)
status = TRF7970A_IRQ_STATUS_SRX;
} else {
trf->state = TRF7970A_ST_WAIT_FOR_RX_DATA_CONT;
+
+ ret = trf7970a_read(trf, TRF7970A_FIFO_STATUS, &fifo_bytes);
+ if (ret) {
+ trf7970a_send_err_upstream(trf, ret);
+ return;
+ }
+
+ fifo_bytes &= ~TRF7970A_FIFO_STATUS_OVERFLOW;
+
+ /* If there are bytes in the FIFO, set status to '0' so
+ * the if stmt below doesn't fire and the driver will wait
+ * for the trf7970a to generate another RX interrupt.
+ */
+ if (fifo_bytes)
+ status = 0;
}
no_rx_data: