diff options
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 0e56fa64b4ce..0718c9f48d21 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1286,13 +1286,19 @@ static void lpuart_dma_rx_complete(void *arg) static void lpuart_timer_func(struct timer_list *t) { struct lpuart_port *sport = from_timer(sport, t, lpuart_timer); + enum dma_status dmastat; struct dma_chan *chan = sport->dma_rx_chan; struct circ_buf *ring = &sport->rx_ring; struct dma_tx_state state; unsigned long flags; int count; - dmaengine_tx_status(chan, sport->dma_rx_cookie, &state); + dmastat = dmaengine_tx_status(chan, sport->dma_rx_cookie, &state); + if (dmastat == DMA_ERROR) { + dev_err(sport->port.dev, "Rx DMA transfer failed!\n"); + return; + } + ring->head = sport->rx_sgl.length - state.residue; count = CIRC_CNT(ring->head, ring->tail, sport->rx_sgl.length); |