diff options
| -rw-r--r-- | drivers/serial/altera_uart.c | 19 |
1 files changed, 4 insertions, 15 deletions
diff --git a/drivers/serial/altera_uart.c b/drivers/serial/altera_uart.c index bcee156d2f2e..b1609cca0ec4 100644 --- a/drivers/serial/altera_uart.c +++ b/drivers/serial/altera_uart.c @@ -89,15 +89,12 @@ static unsigned int altera_uart_tx_empty(struct uart_port *port) static unsigned int altera_uart_get_mctrl(struct uart_port *port) { struct altera_uart *pp = container_of(port, struct altera_uart, port); - unsigned long flags; unsigned int sigs; - spin_lock_irqsave(&port->lock, flags); sigs = (readl(port->membase + ALTERA_UART_STATUS_REG) & ALTERA_UART_STATUS_CTS_MSK) ? TIOCM_CTS : 0; sigs |= (pp->sigs & TIOCM_RTS); - spin_unlock_irqrestore(&port->lock, flags); return sigs; } @@ -105,49 +102,37 @@ static unsigned int altera_uart_get_mctrl(struct uart_port *port) static void altera_uart_set_mctrl(struct uart_port *port, unsigned int sigs) { struct altera_uart *pp = container_of(port, struct altera_uart, port); - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); pp->sigs = sigs; if (sigs & TIOCM_RTS) pp->imr |= ALTERA_UART_CONTROL_RTS_MSK; else pp->imr &= ~ALTERA_UART_CONTROL_RTS_MSK; writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); - spin_unlock_irqrestore(&port->lock, flags); } static void altera_uart_start_tx(struct uart_port *port) { struct altera_uart *pp = container_of(port, struct altera_uart, port); - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); pp->imr |= ALTERA_UART_CONTROL_TRDY_MSK; writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); - spin_unlock_irqrestore(&port->lock, flags); } static void altera_uart_stop_tx(struct uart_port *port) { struct altera_uart *pp = container_of(port, struct altera_uart, port); - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK; writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); - spin_unlock_irqrestore(&port->lock, flags); } static void altera_uart_stop_rx(struct uart_port *port) { struct altera_uart *pp = container_of(port, struct altera_uart, port); - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); pp->imr &= ~ALTERA_UART_CONTROL_RRDY_MSK; writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); - spin_unlock_irqrestore(&port->lock, flags); } static void altera_uart_break_ctl(struct uart_port *port, int break_state) @@ -272,10 +257,14 @@ static irqreturn_t altera_uart_interrupt(int irq, void *data) unsigned int isr; isr = readl(port->membase + ALTERA_UART_STATUS_REG) & pp->imr; + + spin_lock(&port->lock); if (isr & ALTERA_UART_STATUS_RRDY_MSK) altera_uart_rx_chars(pp); if (isr & ALTERA_UART_STATUS_TRDY_MSK) altera_uart_tx_chars(pp); + spin_unlock(&port->lock); + return IRQ_RETVAL(isr); } |