diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/serial-tegra.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index 83cc8dca58d4..82a8d5130cbc 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -294,6 +294,7 @@ static int tegra_set_baudrate(struct tegra_uart_port *tup, unsigned int baud) unsigned long rate; unsigned int divisor; unsigned long lcr; + unsigned long flags; int ret; if (tup->current_baud == baud) @@ -313,6 +314,7 @@ static int tegra_set_baudrate(struct tegra_uart_port *tup, unsigned int baud) divisor = DIV_ROUND_CLOSEST(rate, baud * 16); } + spin_lock_irqsave(&tup->uport.lock, flags); lcr = tup->lcr_shadow; lcr |= UART_LCR_DLAB; tegra_uart_write(tup, lcr, UART_LCR); @@ -325,6 +327,7 @@ static int tegra_set_baudrate(struct tegra_uart_port *tup, unsigned int baud) /* Dummy read to ensure the write is posted */ tegra_uart_read(tup, UART_SCR); + spin_unlock_irqrestore(&tup->uport.lock, flags); tup->current_baud = baud; |