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Commit a93f66dc authored by Linus Torvalds's avatar Linus Torvalds
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Merge tag 'tty-3.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty 

Pull tty/serial driver fixes from Greg KH:
 "Here are 4 tiny tty and serial driver fixes for 3.11-rc4.

  Nothing big, a refcount leak, a module alias fix, and two fixes to the
  mxs-auart serial driver"

* tag 'tty-3.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: arc_uart: Fix module alias
  tty_port: Fix refcounting leak in tty_port_tty_hangup()
  serial/mxs-auart: increase time to wait for transmitter to become idle
  serial/mxs-auart: fix race condition in interrupt handler
parents 36f571e9 d5a12ea7

drivers/tty/serial/arc_uart.c

+1 −1
Original line number Diff line number Diff line
@@ -773,6 +773,6 @@ module_init(arc_serial_init); 
module_exit(arc_serial_exit);



MODULE_LICENSE("GPL");

MODULE_ALIAS("plat-arcfpga/uart");

MODULE_ALIAS("platform:" DRIVER_NAME);

MODULE_AUTHOR("Vineet Gupta");

MODULE_DESCRIPTION("ARC(Synopsys) On-Chip(fpga) serial driver");

drivers/tty/serial/mxs-auart.c

+22 −16
Original line number Diff line number Diff line
@@ -678,11 +678,18 @@ static void mxs_auart_settermios(struct uart_port *u, 


static irqreturn_t mxs_auart_irq_handle(int irq, void *context)

{

	u32 istatus, istat;

	u32 istat;

	struct mxs_auart_port *s = context;

	u32 stat = readl(s->port.membase + AUART_STAT);



	istatus = istat = readl(s->port.membase + AUART_INTR);

	istat = readl(s->port.membase + AUART_INTR);



	/* ack irq */

	writel(istat & (AUART_INTR_RTIS

		| AUART_INTR_TXIS

		| AUART_INTR_RXIS

		| AUART_INTR_CTSMIS),

			s->port.membase + AUART_INTR_CLR);



	if (istat & AUART_INTR_CTSMIS) {

		uart_handle_cts_change(&s->port, stat & AUART_STAT_CTS);
@@ -702,12 +709,6 @@ static irqreturn_t mxs_auart_irq_handle(int irq, void *context) 
		istat &= ~AUART_INTR_TXIS;

	}



	writel(istatus & (AUART_INTR_RTIS

		| AUART_INTR_TXIS

		| AUART_INTR_RXIS

		| AUART_INTR_CTSMIS),

			s->port.membase + AUART_INTR_CLR);



	return IRQ_HANDLED;

}
@@ -850,7 +851,7 @@ auart_console_write(struct console *co, const char *str, unsigned int count) 
	struct mxs_auart_port *s;

	struct uart_port *port;

	unsigned int old_ctrl0, old_ctrl2;

	unsigned int to = 1000;

	unsigned int to = 20000;



	if (co->index >= MXS_AUART_PORTS || co->index < 0)

		return;
@@ -871,18 +872,23 @@ auart_console_write(struct console *co, const char *str, unsigned int count) 


	uart_console_write(port, str, count, mxs_auart_console_putchar);



	/*

	 * Finally, wait for transmitter to become empty

	 * and restore the TCR

	 */

	/* Finally, wait for transmitter to become empty ... */

	while (readl(port->membase + AUART_STAT) & AUART_STAT_BUSY) {

		udelay(1);

		if (!to--)

			break;

		udelay(1);

	}



	/*

	 * ... and restore the TCR if we waited long enough for the transmitter

	 * to be idle. This might keep the transmitter enabled although it is

	 * unused, but that is better than to disable it while it is still

	 * transmitting.

	 */

	if (!(readl(port->membase + AUART_STAT) & AUART_STAT_BUSY)) {

		writel(old_ctrl0, port->membase + AUART_CTRL0);

		writel(old_ctrl2, port->membase + AUART_CTRL2);

	}



	clk_disable(s->clk);

}

drivers/tty/tty_port.c

+2 −3
Original line number Diff line number Diff line
@@ -256,11 +256,10 @@ void tty_port_tty_hangup(struct tty_port *port, bool check_clocal) 
{

	struct tty_struct *tty = tty_port_tty_get(port);



	if (tty && (!check_clocal || !C_CLOCAL(tty))) {

	if (tty && (!check_clocal || !C_CLOCAL(tty)))

		tty_hangup(tty);

	tty_kref_put(tty);

}

}

EXPORT_SYMBOL_GPL(tty_port_tty_hangup);



/**