Merge tag 'tty-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty / serial updates from Greg KH:
 "Here is the "big" set of tty/serial driver patches for 5.15-rc1

  Nothing major in here at all, just some driver updates and more
  cleanups on old tty apis and code that needed it that includes:

   - tty.h cleanup of things that didn't belong in it

   - other tty cleanups by Jiri

   - driver cleanups

   - rs485 support added to amba-pl011 driver

   - dts updates

   - stm32 serial driver updates

   - other minor fixes and driver updates

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

* tag 'tty-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (83 commits)
  tty: serial: uartlite: Use read_poll_timeout for a polling loop
  tty: serial: uartlite: Use constants in early_uartlite_putc
  tty: Fix data race between tiocsti() and flush_to_ldisc()
  serial: vt8500: Use of_device_get_match_data
  serial: tegra: Use of_device_get_match_data
  serial: 8250_ingenic: Use of_device_get_match_data
  tty: serial: linflexuart: Remove redundant check to simplify the code
  tty: serial: fsl_lpuart: do software reset for imx7ulp and imx8qxp
  tty: serial: fsl_lpuart: enable two stop bits for lpuart32
  tty: serial: fsl_lpuart: fix the wrong mapbase value
  mxser: use semi-colons instead of commas
  tty: moxa: use semi-colons instead of commas
  tty: serial: fsl_lpuart: check dma_tx_in_progress in tx dma callback
  tty: replace in_irq() with in_hardirq()
  serial: sh-sci: fix break handling for sysrq
  serial: stm32: use devm_platform_get_and_ioremap_resource()
  serial: stm32: use the defined variable to simplify code
  Revert "arm pl011 serial: support multi-irq request"
  tty: serial: samsung: Add Exynos850 SoC data
  tty: serial: samsung: Fix driver data macros style
  ...

5 files changed, 74 insertions, 56 deletions

diff --git a/arch/alpha/kernel/srmcons.c b/arch/alpha/kernel/srmcons.c
index fc03471a0b0f..90635ef5dafa 100644
--- a/arch/alpha/kernel/srmcons.c
+++ b/arch/alpha/kernel/srmcons.c
@@ -204,9 +204,9 @@ srmcons_init(void)
 		struct tty_driver *driver;
 		int err;
 
-		driver = alloc_tty_driver(MAX_SRM_CONSOLE_DEVICES);
-		if (!driver)
-			return -ENOMEM;
+		driver = tty_alloc_driver(MAX_SRM_CONSOLE_DEVICES, 0);
+		if (IS_ERR(driver))
+			return PTR_ERR(driver);
 
 		tty_port_init(&srmcons_singleton.port);
 
@@ -221,7 +221,7 @@ srmcons_init(void)
 		tty_port_link_device(&srmcons_singleton.port, driver, 0);
 		err = tty_register_driver(driver);
 		if (err) {
-			put_tty_driver(driver);
+			tty_driver_kref_put(driver);
 			tty_port_destroy(&srmcons_singleton.port);
 			return err;
 		}
diff --git a/arch/m68k/emu/nfcon.c b/arch/m68k/emu/nfcon.c
index 92636c89d65b..557d60867f98 100644
--- a/arch/m68k/emu/nfcon.c
+++ b/arch/m68k/emu/nfcon.c
@@ -120,35 +120,37 @@ early_param("debug", nf_debug_setup);
 
 static int __init nfcon_init(void)
 {
+	struct tty_driver *driver;
 	int res;
 
 	stderr_id = nf_get_id("NF_STDERR");
 	if (!stderr_id)
 		return -ENODEV;
 
-	nfcon_tty_driver = alloc_tty_driver(1);
-	if (!nfcon_tty_driver)
-		return -ENOMEM;
+	driver = tty_alloc_driver(1, TTY_DRIVER_REAL_RAW);
+	if (IS_ERR(driver))
+		return PTR_ERR(driver);
 
 	tty_port_init(&nfcon_tty_port);
 
-	nfcon_tty_driver->driver_name = "nfcon";
-	nfcon_tty_driver->name = "nfcon";
-	nfcon_tty_driver->type = TTY_DRIVER_TYPE_SYSTEM;
-	nfcon_tty_driver->subtype = SYSTEM_TYPE_TTY;
-	nfcon_tty_driver->init_termios = tty_std_termios;
-	nfcon_tty_driver->flags = TTY_DRIVER_REAL_RAW;
+	driver->driver_name = "nfcon";
+	driver->name = "nfcon";
+	driver->type = TTY_DRIVER_TYPE_SYSTEM;
+	driver->subtype = SYSTEM_TYPE_TTY;
+	driver->init_termios = tty_std_termios;
 
-	tty_set_operations(nfcon_tty_driver, &nfcon_tty_ops);
-	tty_port_link_device(&nfcon_tty_port, nfcon_tty_driver, 0);
-	res = tty_register_driver(nfcon_tty_driver);
+	tty_set_operations(driver, &nfcon_tty_ops);
+	tty_port_link_device(&nfcon_tty_port, driver, 0);
+	res = tty_register_driver(driver);
 	if (res) {
 		pr_err("failed to register nfcon tty driver\n");
-		put_tty_driver(nfcon_tty_driver);
+		tty_driver_kref_put(driver);
 		tty_port_destroy(&nfcon_tty_port);
 		return res;
 	}
 
+	nfcon_tty_driver = driver;
+
 	if (!(nf_console.flags & CON_ENABLED))
 		register_console(&nf_console);
 
@@ -159,7 +161,7 @@ static void __exit nfcon_exit(void)
 {
 	unregister_console(&nf_console);
 	tty_unregister_driver(nfcon_tty_driver);
-	put_tty_driver(nfcon_tty_driver);
+	tty_driver_kref_put(nfcon_tty_driver);
 	tty_port_destroy(&nfcon_tty_port);
 }
 
diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c
index 39ccad063533..2661cdd256ae 100644
--- a/arch/parisc/kernel/pdc_cons.c
+++ b/arch/parisc/kernel/pdc_cons.c
@@ -138,6 +138,7 @@ static struct tty_driver *pdc_console_tty_driver;
 
 static int __init pdc_console_tty_driver_init(void)
 {
+	struct tty_driver *driver;
 	int err;
 
 	/* Check if the console driver is still registered.
@@ -160,31 +161,32 @@ static int __init pdc_console_tty_driver_init(void)
 	printk(KERN_INFO "The PDC console driver is still registered, removing CON_BOOT flag\n");
 	pdc_cons.flags &= ~CON_BOOT;
 
-	pdc_console_tty_driver = alloc_tty_driver(1);
-
-	if (!pdc_console_tty_driver)
-		return -ENOMEM;
+	driver = tty_alloc_driver(1, TTY_DRIVER_REAL_RAW |
+			TTY_DRIVER_RESET_TERMIOS);
+	if (IS_ERR(driver))
+		return PTR_ERR(driver);
 
 	tty_port_init(&tty_port);
 
-	pdc_console_tty_driver->driver_name = "pdc_cons";
-	pdc_console_tty_driver->name = "ttyB";
-	pdc_console_tty_driver->major = MUX_MAJOR;
-	pdc_console_tty_driver->minor_start = 0;
-	pdc_console_tty_driver->type = TTY_DRIVER_TYPE_SYSTEM;
-	pdc_console_tty_driver->init_termios = tty_std_termios;
-	pdc_console_tty_driver->flags = TTY_DRIVER_REAL_RAW |
-		TTY_DRIVER_RESET_TERMIOS;
-	tty_set_operations(pdc_console_tty_driver, &pdc_console_tty_ops);
-	tty_port_link_device(&tty_port, pdc_console_tty_driver, 0);
-
-	err = tty_register_driver(pdc_console_tty_driver);
+	driver->driver_name = "pdc_cons";
+	driver->name = "ttyB";
+	driver->major = MUX_MAJOR;
+	driver->minor_start = 0;
+	driver->type = TTY_DRIVER_TYPE_SYSTEM;
+	driver->init_termios = tty_std_termios;
+	tty_set_operations(driver, &pdc_console_tty_ops);
+	tty_port_link_device(&tty_port, driver, 0);
+
+	err = tty_register_driver(driver);
 	if (err) {
 		printk(KERN_ERR "Unable to register the PDC console TTY driver\n");
 		tty_port_destroy(&tty_port);
+		tty_driver_kref_put(driver);
 		return err;
 	}
 
+	pdc_console_tty_driver = driver;
+
 	return 0;
 }
 device_initcall(pdc_console_tty_driver_init);
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index fbc623d2cc07..8febf95da96e 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -538,12 +538,14 @@ int register_lines(struct line_driver *line_driver,
 		   const struct tty_operations *ops,
 		   struct line *lines, int nlines)
 {
-	struct tty_driver *driver = alloc_tty_driver(nlines);
+	struct tty_driver *driver;
 	int err;
 	int i;
 
-	if (!driver)
-		return -ENOMEM;
+	driver = tty_alloc_driver(nlines, TTY_DRIVER_REAL_RAW |
+			TTY_DRIVER_DYNAMIC_DEV);
+	if (IS_ERR(driver))
+		return PTR_ERR(driver);
 
 	driver->driver_name = line_driver->name;
 	driver->name = line_driver->device_name;
@@ -551,9 +553,8 @@ int register_lines(struct line_driver *line_driver,
 	driver->minor_start = line_driver->minor_start;
 	driver->type = line_driver->type;
 	driver->subtype = line_driver->subtype;
-	driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
 	driver->init_termios = tty_std_termios;
-	
+
 	for (i = 0; i < nlines; i++) {
 		tty_port_init(&lines[i].port);
 		lines[i].port.ops = &line_port_ops;
@@ -567,7 +568,7 @@ int register_lines(struct line_driver *line_driver,
 	if (err) {
 		printk(KERN_ERR "register_lines : can't register %s driver\n",
 		       line_driver->name);
-		put_tty_driver(driver);
+		tty_driver_kref_put(driver);
 		for (i = 0; i < nlines; i++)
 			tty_port_destroy(&lines[i].port);
 		return err;
diff --git a/arch/xtensa/platforms/iss/console.c b/arch/xtensa/platforms/iss/console.c
index 21184488c277..81f988914d9a 100644
--- a/arch/xtensa/platforms/iss/console.c
+++ b/arch/xtensa/platforms/iss/console.c
@@ -136,28 +136,41 @@ static const struct tty_operations serial_ops = {
 
 static int __init rs_init(void)
 {
-	tty_port_init(&serial_port);
+	struct tty_driver *driver;
+	int ret;
+
+	driver = tty_alloc_driver(SERIAL_MAX_NUM_LINES, TTY_DRIVER_REAL_RAW);
+	if (IS_ERR(driver))
+		return PTR_ERR(driver);
 
-	serial_driver = alloc_tty_driver(SERIAL_MAX_NUM_LINES);
+	tty_port_init(&serial_port);
 
 	/* Initialize the tty_driver structure */
 
-	serial_driver->driver_name = "iss_serial";
-	serial_driver->name = "ttyS";
-	serial_driver->major = TTY_MAJOR;
-	serial_driver->minor_start = 64;
-	serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
-	serial_driver->subtype = SERIAL_TYPE_NORMAL;
-	serial_driver->init_termios = tty_std_termios;
-	serial_driver->init_termios.c_cflag =
+	driver->driver_name = "iss_serial";
+	driver->name = "ttyS";
+	driver->major = TTY_MAJOR;
+	driver->minor_start = 64;
+	driver->type = TTY_DRIVER_TYPE_SERIAL;
+	driver->subtype = SERIAL_TYPE_NORMAL;
+	driver->init_termios = tty_std_termios;
+	driver->init_termios.c_cflag =
 		B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-	serial_driver->flags = TTY_DRIVER_REAL_RAW;
 
-	tty_set_operations(serial_driver, &serial_ops);
-	tty_port_link_device(&serial_port, serial_driver, 0);
+	tty_set_operations(driver, &serial_ops);
+	tty_port_link_device(&serial_port, driver, 0);
+
+	ret = tty_register_driver(driver);
+	if (ret) {
+		pr_err("Couldn't register serial driver\n");
+		tty_driver_kref_put(driver);
+		tty_port_destroy(&serial_port);
+
+		return ret;
+	}
+
+	serial_driver = driver;
 
-	if (tty_register_driver(serial_driver))
-		panic("Couldn't register serial driver\n");
 	return 0;
 }
 
@@ -165,7 +178,7 @@ static int __init rs_init(void)
 static __exit void rs_exit(void)
 {
 	tty_unregister_driver(serial_driver);
-	put_tty_driver(serial_driver);
+	tty_driver_kref_put(serial_driver);
 	tty_port_destroy(&serial_port);
 }