diff options
| -rw-r--r-- | drivers/tty/serial/serial-tegra.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index 0d9d7ceb1dbb..a53899c47e60 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -554,6 +554,10 @@ static void tegra_uart_copy_rx_to_tty(struct tegra_uart_port *tup, { int copied; + /* If count is zero, then there is no data to be copied */ + if (!count) + return; + tup->uport.icount.rx += count; if (!tty) { dev_err(tup->uport.dev, "No tty port\n"); @@ -588,8 +592,7 @@ static void tegra_uart_rx_dma_complete(void *args) set_rts(tup, false); /* If we are here, DMA is stopped */ - if (count) - tegra_uart_copy_rx_to_tty(tup, port, count); + tegra_uart_copy_rx_to_tty(tup, port, count); tegra_uart_handle_rx_pio(tup, port); if (tty) { @@ -626,8 +629,7 @@ static void tegra_uart_handle_rx_dma(struct tegra_uart_port *tup, count = tup->rx_bytes_requested - state.residue; /* If we are here, DMA is stopped */ - if (count) - tegra_uart_copy_rx_to_tty(tup, port, count); + tegra_uart_copy_rx_to_tty(tup, port, count); tegra_uart_handle_rx_pio(tup, port); if (tty) { |