diff options
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 29932b73c004..e95c4971327b 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -755,18 +755,18 @@ out: static irqreturn_t lpuart_int(int irq, void *dev_id) { struct lpuart_port *sport = dev_id; - unsigned char sts; + unsigned char sts, crdma; sts = readb(sport->port.membase + UARTSR1); + crdma = readb(sport->port.membase + UARTCR5); - if (sts & UARTSR1_RDRF) { + if (sts & UARTSR1_RDRF && !(crdma & UARTCR5_RDMAS)) { if (sport->lpuart_dma_use) lpuart_prepare_rx(sport); else lpuart_rxint(irq, dev_id); } - if (sts & UARTSR1_TDRE && - !(readb(sport->port.membase + UARTCR5) & UARTCR5_TDMAS)) { + if (sts & UARTSR1_TDRE && !(crdma & UARTCR5_TDMAS)) { if (sport->lpuart_dma_use) lpuart_pio_tx(sport); else @@ -1106,6 +1106,7 @@ static int lpuart_startup(struct uart_port *port) setup_timer(&sport->lpuart_timer, lpuart_timer_func, (unsigned long)sport); temp = readb(port->membase + UARTCR5); + temp &= ~UARTCR5_RDMAS; writeb(temp | UARTCR5_TDMAS, port->membase + UARTCR5); } |