commit: http://blackfin.uclinux.org/git/?p=linux-kernel;a=commitdiff;h=4b5c54d313c4408f9bd84059dd4609e2d2cce5b8 branch: http://blackfin.uclinux.org/git/?p=linux-kernel;a=shortlog;h=refs/heads/trunk
Check if xmit buffer pointers are set to zero. Signed-off-by: Sonic Zhang <[email protected]> --- drivers/tty/serial/bfin_uart.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c index b33c9d5..b8377fa 100644 --- a/drivers/tty/serial/bfin_uart.c +++ b/drivers/tty/serial/bfin_uart.c @@ -536,7 +536,7 @@ 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)
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