From 239c25b1a03cf57193b9a52623deb918adf6132e Mon Sep 17 00:00:00 2001 From: Sonic Zhang Date: Wed, 16 May 2012 14:22:24 +0800 Subject: serial: bfin_uart: narrow the reboot condition in DMA tx interrupt Check if xmit buffer pointers are set to zero. Signed-off-by: Sonic Zhang Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/bfin_uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c index 9acab114d804..56b95b0447d9 100644 --- a/drivers/tty/serial/bfin_uart.c +++ b/drivers/tty/serial/bfin_uart.c @@ -532,7 +532,7 @@ static irqreturn_t bfin_serial_dma_tx_int(int irq, void *dev_id) */ UART_CLEAR_IER(uart, ETBEI); uart->port.icount.tx += uart->tx_count; - if (!uart_circ_empty(xmit)) { + if (!(xmit->tail == 0 && xmit->head == 0)) { xmit->tail = (xmit->tail + uart->tx_count) & (UART_XMIT_SIZE - 1); if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) -- cgit v1.2.3-70-g09d2