Commit cc14086f authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'tty-5.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty 

Pull tty/serial fixes from Greg KH:
 "Here are some small tty and serial driver fixes to resolve some
  reported problems:

   - led tty trigger fixes based on review and were acked by the led
     maintainer

   - revert a max310x serial driver patch as it was causing problems

   - revert a pty change as it was also causing problems

  All of these have been in linux-next for a while with no reported
  problems"

* tag 'tty-5.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  Revert "drivers:tty:pty: Fix a race causing data loss on close"
  Revert "serial: max310x: rework RX interrupt handling"
  leds: trigger/tty: Use led_set_brightness_sync() from workqueue
  leds: trigger: Fix error path to not unlock the unlocked mutex
parents 5c7bdbf8 c776b77a

drivers/leds/trigger/ledtrig-tty.c

+4 −7
Original line number Diff line number Diff line
@@ -51,10 +51,8 @@ static ssize_t ttyname_store(struct device *dev, 


	if (size) {

		ttyname = kmemdup_nul(buf, size, GFP_KERNEL);

		if (!ttyname) {

			ret = -ENOMEM;

			goto out_unlock;

		}

		if (!ttyname)

			return -ENOMEM;

	} else {

		ttyname = NULL;

	}
@@ -69,7 +67,6 @@ static ssize_t ttyname_store(struct device *dev, 


	trigger_data->ttyname = ttyname;



out_unlock:

	mutex_unlock(&trigger_data->mutex);



	if (ttyname && !running)
@@ -125,12 +122,12 @@ static void ledtrig_tty_work(struct work_struct *work) 


	if (icount.rx != trigger_data->rx ||

	    icount.tx != trigger_data->tx) {

		led_set_brightness(trigger_data->led_cdev, LED_ON);

		led_set_brightness_sync(trigger_data->led_cdev, LED_ON);



		trigger_data->rx = icount.rx;

		trigger_data->tx = icount.tx;

	} else {

		led_set_brightness(trigger_data->led_cdev, LED_OFF);

		led_set_brightness_sync(trigger_data->led_cdev, LED_OFF);

	}



out:

drivers/tty/pty.c

+2 −13
Original line number Diff line number Diff line
@@ -66,8 +66,7 @@ static void pty_close(struct tty_struct *tty, struct file *filp) 
	wake_up_interruptible(&tty->link->read_wait);

	wake_up_interruptible(&tty->link->write_wait);

	if (tty->driver->subtype == PTY_TYPE_MASTER) {

		struct file *f;



		set_bit(TTY_OTHER_CLOSED, &tty->flags);

#ifdef CONFIG_UNIX98_PTYS

		if (tty->driver == ptm_driver) {

			mutex_lock(&devpts_mutex);
@@ -76,17 +75,7 @@ static void pty_close(struct tty_struct *tty, struct file *filp) 
			mutex_unlock(&devpts_mutex);

		}

#endif



		/*

		 * This hack is required because a program can open a

		 * pty and redirect a console to it, but if the pty is

		 * closed and the console is not released, then the

		 * slave side will never close.  So release the

		 * redirect when the master closes.

		 */

		f = tty_release_redirect(tty->link);

		if (f)

			fput(f);

		tty_vhangup(tty->link);

	}

}

drivers/tty/serial/max310x.c

+5 −24
Original line number Diff line number Diff line
@@ -1056,9 +1056,9 @@ static int max310x_startup(struct uart_port *port) 
	max310x_port_update(port, MAX310X_MODE1_REG,

			    MAX310X_MODE1_TRNSCVCTRL_BIT, 0);



	/* Reset FIFOs */

	max310x_port_write(port, MAX310X_MODE2_REG,

			   MAX310X_MODE2_FIFORST_BIT);

	/* Configure MODE2 register & Reset FIFOs*/

	val = MAX310X_MODE2_RXEMPTINV_BIT | MAX310X_MODE2_FIFORST_BIT;

	max310x_port_write(port, MAX310X_MODE2_REG, val);

	max310x_port_update(port, MAX310X_MODE2_REG,

			    MAX310X_MODE2_FIFORST_BIT, 0);
@@ -1086,27 +1086,8 @@ static int max310x_startup(struct uart_port *port) 
	/* Clear IRQ status register */

	max310x_port_read(port, MAX310X_IRQSTS_REG);



	/*

	 * Let's ask for an interrupt after a timeout equivalent to

	 * the receiving time of 4 characters after the last character

	 * has been received.

	 */

	max310x_port_write(port, MAX310X_RXTO_REG, 4);



	/*

	 * Make sure we also get RX interrupts when the RX FIFO is

	 * filling up quickly, so get an interrupt when half of the RX

	 * FIFO has been filled in.

	 */

	max310x_port_write(port, MAX310X_FIFOTRIGLVL_REG,

			   MAX310X_FIFOTRIGLVL_RX(MAX310X_FIFO_SIZE / 2));



	/* Enable RX timeout interrupt in LSR */

	max310x_port_write(port, MAX310X_LSR_IRQEN_REG,

			   MAX310X_LSR_RXTO_BIT);



	/* Enable LSR, RX FIFO trigger, CTS change interrupts */

	val = MAX310X_IRQ_LSR_BIT  | MAX310X_IRQ_RXFIFO_BIT | MAX310X_IRQ_TXEMPTY_BIT;

	/* Enable RX, TX, CTS change interrupts */

	val = MAX310X_IRQ_RXEMPTY_BIT | MAX310X_IRQ_TXEMPTY_BIT;

	max310x_port_write(port, MAX310X_IRQEN_REG, val | MAX310X_IRQ_CTS_BIT);



	return 0;

drivers/tty/tty_io.c

+2 −3
Original line number Diff line number Diff line
@@ -544,9 +544,7 @@ EXPORT_SYMBOL_GPL(tty_wakeup); 
 *	@tty: tty device

 *

 *	This is available to the pty code so if the master closes, if the

 *	slave is a redirect it can release the redirect.  It returns the

 *	filp for the redirect, which must be fput when the operations on

 *	the tty are completed.

 *	slave is a redirect it can release the redirect.

 */

struct file *tty_release_redirect(struct tty_struct *tty)

{
@@ -561,6 +559,7 @@ struct file *tty_release_redirect(struct tty_struct *tty) 


	return f;

}

EXPORT_SYMBOL_GPL(tty_release_redirect);



/**

 *	__tty_hangup		-	actual handler for hangup events