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path: root/drivers/tty/serial/serial-tegra.c
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Diffstat (limited to 'drivers/tty/serial/serial-tegra.c')
-rw-r--r--drivers/tty/serial/serial-tegra.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c
index ee7c8123c374..d0d972f7e43e 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 |
@@ -1206,7 +1212,7 @@ 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 +1243,13 @@ 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,