X-Git-Url: http://git.cascardo.eti.br/?a=blobdiff_plain;f=drivers%2Ftty%2Fserial%2Ffsl_lpuart.c;h=76103f2c4a8001e36e10fffc7581ee2ee4c885b6;hb=c636e176d8e5afe2f3b3e3f1de33ec13f1cee308;hp=de9d5107c00a0e1430b9ad8f8dfb99b7d4b2c9b3;hpb=b56061b04e0264f3b24f7450a3d5790437bb912a;p=cascardo%2Flinux.git

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index de9d5107c00a..76103f2c4a80 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -328,7 +328,7 @@ static void lpuart_dma_tx(struct lpuart_port *sport)
 
 	sport->dma_tx_bytes = uart_circ_chars_pending(xmit);
 
-	if (xmit->tail < xmit->head) {
+	if (xmit->tail < xmit->head || xmit->head == 0) {
 		sport->dma_tx_nents = 1;
 		sg_init_one(sgl, xmit->buf + xmit->tail, sport->dma_tx_bytes);
 	} else {
@@ -359,7 +359,6 @@ static void lpuart_dma_tx(struct lpuart_port *sport)
 	sport->dma_tx_in_progress = true;
 	sport->dma_tx_cookie = dmaengine_submit(sport->dma_tx_desc);
 	dma_async_issue_pending(sport->dma_tx_chan);
-
 }
 
 static void lpuart_dma_tx_complete(void *arg)