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serial: tegra: fix tty-kref leak 

Fix potential tty-kref leak in stop_rx path.

Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2013-09-10 12:50:48 +02:00 committed by Greg Kroah-Hartman
parent 272b98c645
commit cfd29aa0e8
1 changed files with 3 additions and 1 deletions
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4
drivers/tty/serial/serial-tegra.c
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@ -732,7 +732,7 @@ static irqreturn_t tegra_uart_isr(int irq, void *data)
static void tegra_uart_stop_rx(struct uart_port *u) static void tegra_uart_stop_rx(struct uart_port *u)
{ {
struct tegra_uart_port *tup = to_tegra_uport(u); struct tegra_uart_port *tup = to_tegra_uport(u);
struct tty_struct *tty = tty_port_tty_get(&tup->uport.state->port); struct tty_struct *tty;
struct tty_port *port = &u->state->port; struct tty_port *port = &u->state->port;
struct dma_tx_state state; struct dma_tx_state state;
unsigned long ier; unsigned long ier;
@ -744,6 +744,8 @@ static void tegra_uart_stop_rx(struct uart_port *u)
if (!tup->rx_in_progress) if (!tup->rx_in_progress)
return; return;
tty = tty_port_tty_get(&tup->uport.state->port);
tegra_uart_wait_sym_time(tup, 1); /* wait a character interval */ tegra_uart_wait_sym_time(tup, 1); /* wait a character interval */
ier = tup->ier_shadow; ier = tup->ier_shadow;