staging: nvec: Reject incomplete messages

Reject incomplete messages, causing the request to be
transmitted again. This should fix various problems
out there.
Signed-off-by: Julian Andres Klode <jak@jak-linux.org>
Acked-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/nvec/nvec.c

@@ -439,11 +439,16 @@ static void nvec_tx_completed(struct nvec_chip *nvec)
  */
 static void nvec_rx_completed(struct nvec_chip *nvec)
 {
-	if (nvec->rx->pos != nvec_msg_size(nvec->rx))
+	if (nvec->rx->pos != nvec_msg_size(nvec->rx)) {
 		dev_err(nvec->dev, "RX incomplete: Expected %u bytes, got %u\n",
 			   (uint) nvec_msg_size(nvec->rx),
 			   (uint) nvec->rx->pos);
 
+		nvec_msg_free(nvec, nvec->rx);
+		nvec->state = 0;
+		return;
+	}
+
 	spin_lock(&nvec->rx_lock);
 
 	/* add the received data to the work list