diff options
Diffstat (limited to 'drivers/tty/serial/serial-tegra.c')
| -rw-r--r-- | drivers/tty/serial/serial-tegra.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index ee7c8123c374..0489a2bdcdf9 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -571,7 +571,9 @@ static void tegra_uart_rx_dma_complete(void *args) tegra_uart_handle_rx_pio(tup, port); if (tty) { + spin_unlock_irqrestore(&u->lock, flags); tty_flip_buffer_push(port); + spin_lock_irqsave(&u->lock, flags); tty_kref_put(tty); } tegra_uart_start_rx_dma(tup); @@ -583,11 +585,13 @@ static void tegra_uart_rx_dma_complete(void *args) spin_unlock_irqrestore(&u->lock, flags); } -static void tegra_uart_handle_rx_dma(struct tegra_uart_port *tup) +static void tegra_uart_handle_rx_dma(struct tegra_uart_port *tup, + unsigned long *flags) { struct dma_tx_state state; struct tty_struct *tty = tty_port_tty_get(&tup->uport.state->port); struct tty_port *port = &tup->uport.state->port; + struct uart_port *u = &tup->uport; int count; /* Deactivate flow control to stop sender */ @@ -604,7 +608,9 @@ static void tegra_uart_handle_rx_dma(struct tegra_uart_port *tup) tegra_uart_handle_rx_pio(tup, port); if (tty) { + spin_unlock_irqrestore(&u->lock, *flags); tty_flip_buffer_push(port); + spin_lock_irqsave(&u->lock, *flags); tty_kref_put(tty); } tegra_uart_start_rx_dma(tup); @@ -671,7 +677,7 @@ static irqreturn_t tegra_uart_isr(int irq, void *data) iir = tegra_uart_read(tup, UART_IIR); if (iir & UART_IIR_NO_INT) { if (is_rx_int) { - tegra_uart_handle_rx_dma(tup); + tegra_uart_handle_rx_dma(tup, &flags); if (tup->rx_in_progress) { ier = tup->ier_shadow; ier |= (UART_IER_RLSI | UART_IER_RTOIE | @@ -726,7 +732,7 @@ static irqreturn_t tegra_uart_isr(int irq, void *data) static void tegra_uart_stop_rx(struct uart_port *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 dma_tx_state state; unsigned long ier; @@ -738,6 +744,8 @@ static void tegra_uart_stop_rx(struct uart_port *u) if (!tup->rx_in_progress) return; + tty = tty_port_tty_get(&tup->uport.state->port); + tegra_uart_wait_sym_time(tup, 1); /* wait a character interval */ ier = tup->ier_shadow; @@ -1206,7 +1214,7 @@ static struct uart_driver tegra_uart_driver = { .owner = THIS_MODULE, .driver_name = "tegra_hsuart", .dev_name = "ttyTHS", - .cons = 0, + .cons = NULL, .nr = TEGRA_UART_MAXIMUM, }; @@ -1237,13 +1245,13 @@ static int tegra_uart_parse_dt(struct platform_device *pdev, return 0; } -struct tegra_uart_chip_data tegra20_uart_chip_data = { +static struct tegra_uart_chip_data tegra20_uart_chip_data = { .tx_fifo_full_status = false, .allow_txfifo_reset_fifo_mode = true, .support_clk_src_div = false, }; -struct tegra_uart_chip_data tegra30_uart_chip_data = { +static struct tegra_uart_chip_data tegra30_uart_chip_data = { .tx_fifo_full_status = true, .allow_txfifo_reset_fifo_mode = false, .support_clk_src_div = true, |