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TTY fixes for 3.4-rc4

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Here are 3 tiny bugfixes for 3.4-rc4.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.4-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull 3 tiny tty bugfixes from Greg Kroah-Hartman.

* tag 'tty-3.4-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  drivers/tty/amiserial.c: add missing tty_unlock
  pch_uart: Fix dma channel unallocated issue
  ARM: clps711x: serial driver hungs are a result of call disable_irq within ISR
This commit is contained in:
Linus Torvalds 2012-04-20 11:40:43 -07:00
commit 3a53743039
3 changed files with 14 additions and 8 deletions
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4
drivers/tty/amiserial.c
View File

@ -1073,8 +1073,10 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state,
(new_serial.close_delay != port->close_delay) ||
(new_serial.xmit_fifo_size != state->xmit_fifo_size) ||
((new_serial.flags & ~ASYNC_USR_MASK) !=
(port->flags & ~ASYNC_USR_MASK)))
(port->flags & ~ASYNC_USR_MASK))) {
tty_unlock();
return -EPERM;
}
port->flags = ((port->flags & ~ASYNC_USR_MASK) |
(new_serial.flags & ASYNC_USR_MASK));
state->custom_divisor = new_serial.custom_divisor;

14
drivers/tty/serial/clps711x.c
View File

@ -154,10 +154,9 @@ static irqreturn_t clps711xuart_int_tx(int irq, void *dev_id)
port->x_char = 0;
return IRQ_HANDLED;
}
if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
clps711xuart_stop_tx(port);
return IRQ_HANDLED;
}
if (uart_circ_empty(xmit) || uart_tx_stopped(port))
goto disable_tx_irq;
count = port->fifosize >> 1;
do {
@ -171,8 +170,11 @@ static irqreturn_t clps711xuart_int_tx(int irq, void *dev_id)
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
if (uart_circ_empty(xmit))
clps711xuart_stop_tx(port);
if (uart_circ_empty(xmit)) {
disable_tx_irq:
disable_irq_nosync(TX_IRQ(port));
tx_enabled(port) = 0;
}
return IRQ_HANDLED;
}

4
drivers/tty/serial/pch_uart.c
View File

@ -1447,9 +1447,11 @@ static int pch_uart_verify_port(struct uart_port *port,
__func__);
return -EOPNOTSUPP;
#endif
priv->use_dma = 1;
priv->use_dma_flag = 1;
dev_info(priv->port.dev, "PCH UART : Use DMA Mode\n");
if (!priv->use_dma)
pch_request_dma(port);
priv->use_dma = 1;
}
return 0;