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TTY/Serial driver fixes for 5.4-rc3

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Here are some small tty and serial driver fixes for 5.4-rc3 that resolve
 a number of reported issues and regressions.
 
 None of these are huge, full details are in the shortlog.  THere's also
 a MAINTAINERS update that I think you might have already taken in your
 tree already, but git should handle that merge easily.
 
 All have been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver fixes from Greg KH:
 "Here are some small tty and serial driver fixes for 5.4-rc3 that
  resolve a number of reported issues and regressions.

  None of these are huge, full details are in the shortlog. There's also
  a MAINTAINERS update that I think you might have already taken in your
  tree already, but git should handle that merge easily.

  All have been in linux-next with no reported issues"

* tag 'tty-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  MAINTAINERS: kgdb: Add myself as a reviewer for kgdb/kdb
  tty: serial: imx: Use platform_get_irq_optional() for optional IRQs
  serial: fix kernel-doc warning in comments
  serial: 8250_omap: Fix gpio check for auto RTS/CTS
  serial: mctrl_gpio: Check for NULL pointer
  tty: serial: fsl_lpuart: Fix lpuart_flush_buffer()
  tty: serial: Fix PORT_LINFLEXUART definition
  tty: n_hdlc: fix build on SPARC
  serial: uartps: Fix uartps_major handling
  serial: uartlite: fix exit path null pointer
  tty: serial: linflexuart: Fix magic SysRq handling
  serial: sh-sci: Use platform_get_irq_optional() for optional interrupts
  dt-bindings: serial: sh-sci: Document r8a774b1 bindings
  serial/sifive: select SERIAL_EARLYCON
  tty: serial: rda: Fix the link time qualifier of 'rda_uart_exit()'
  tty: serial: owl: Fix the link time qualifier of 'owl_uart_exit()'
This commit is contained in:
Linus Torvalds 2019-10-12 15:42:19 -07:00
commit 82c87e7d40
15 changed files with 51 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/devicetree/bindings/serial/renesas,sci-serial.txt
View File

@ -26,6 +26,8 @@ Required properties:
- "renesas,hscif-r8a77470" for R8A77470 (RZ/G1C) HSCIF compatible UART.
- "renesas,scif-r8a774a1" for R8A774A1 (RZ/G2M) SCIF compatible UART.
- "renesas,hscif-r8a774a1" for R8A774A1 (RZ/G2M) HSCIF compatible UART.
- "renesas,scif-r8a774b1" for R8A774B1 (RZ/G2N) SCIF compatible UART.
- "renesas,hscif-r8a774b1" for R8A774B1 (RZ/G2N) HSCIF compatible UART.
- "renesas,scif-r8a774c0" for R8A774C0 (RZ/G2E) SCIF compatible UART.
- "renesas,hscif-r8a774c0" for R8A774C0 (RZ/G2E) HSCIF compatible UART.
- "renesas,scif-r8a7778" for R8A7778 (R-Car M1) SCIF compatible UART.

5
drivers/tty/n_hdlc.c
View File

@ -968,6 +968,11 @@ static int __init n_hdlc_init(void)
} /* end of init_module() */
#ifdef CONFIG_SPARC
#undef __exitdata
#define __exitdata
#endif
static const char hdlc_unregister_ok[] __exitdata =
KERN_INFO "N_HDLC: line discipline unregistered\n";
static const char hdlc_unregister_fail[] __exitdata =

5
drivers/tty/serial/8250/8250_omap.c
View File

@ -141,7 +141,7 @@ static void omap8250_set_mctrl(struct uart_port *port, unsigned int mctrl)
serial8250_do_set_mctrl(port, mctrl);
if (!up->gpios) {
if (!mctrl_gpio_to_gpiod(up->gpios, UART_GPIO_RTS)) {
/*
* Turn off autoRTS if RTS is lowered and restore autoRTS
* setting if RTS is raised
@ -456,7 +456,8 @@ static void omap_8250_set_termios(struct uart_port *port,
up->port.status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS | UPSTAT_AUTOXOFF);
if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW &&
!up->gpios) {
!mctrl_gpio_to_gpiod(up->gpios, UART_GPIO_RTS) &&
!mctrl_gpio_to_gpiod(up->gpios, UART_GPIO_CTS)) {
/* Enable AUTOCTS (autoRTS is enabled when RTS is raised) */
up->port.status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS;
priv->efr |= UART_EFR_CTS;

1
drivers/tty/serial/Kconfig
View File

@ -1032,6 +1032,7 @@ config SERIAL_SIFIVE_CONSOLE
bool "Console on SiFive UART"
depends on SERIAL_SIFIVE=y
select SERIAL_CORE_CONSOLE
select SERIAL_EARLYCON
help
Select this option if you would like to use a SiFive UART as the
system console.

21
drivers/tty/serial/fsl_linflexuart.c
View File

@ -3,7 +3,7 @@
* Freescale linflexuart serial port driver
*
* Copyright 2012-2016 Freescale Semiconductor, Inc.
* Copyright 2017-2018 NXP
* Copyright 2017-2019 NXP
*/
#if defined(CONFIG_SERIAL_FSL_LINFLEXUART_CONSOLE) && \
@ -246,12 +246,14 @@ static irqreturn_t linflex_rxint(int irq, void *dev_id)
struct tty_port *port = &sport->state->port;
unsigned long flags, status;
unsigned char rx;
bool brk;
spin_lock_irqsave(&sport->lock, flags);
status = readl(sport->membase + UARTSR);
while (status & LINFLEXD_UARTSR_RMB) {
rx = readb(sport->membase + BDRM);
brk = false;
flg = TTY_NORMAL;
sport->icount.rx++;
@ -261,8 +263,11 @@ static irqreturn_t linflex_rxint(int irq, void *dev_id)
status |= LINFLEXD_UARTSR_SZF;
if (status & LINFLEXD_UARTSR_BOF)
status |= LINFLEXD_UARTSR_BOF;
if (status & LINFLEXD_UARTSR_FEF)
if (status & LINFLEXD_UARTSR_FEF) {
if (!rx)
brk = true;
status |= LINFLEXD_UARTSR_FEF;
}
if (status & LINFLEXD_UARTSR_PE)
status |= LINFLEXD_UARTSR_PE;
}
@ -271,13 +276,15 @@ static irqreturn_t linflex_rxint(int irq, void *dev_id)
sport->membase + UARTSR);
status = readl(sport->membase + UARTSR);
if (uart_handle_sysrq_char(sport, (unsigned char)rx))
continue;
if (brk) {
uart_handle_break(sport);
} else {
#ifdef SUPPORT_SYSRQ
sport->sysrq = 0;
if (uart_handle_sysrq_char(sport, (unsigned char)rx))
continue;
#endif
tty_insert_flip_char(port, rx, flg);
tty_insert_flip_char(port, rx, flg);
}
}
spin_unlock_irqrestore(&sport->lock, flags);

2
drivers/tty/serial/fsl_lpuart.c
View File

@ -548,7 +548,7 @@ static void lpuart_flush_buffer(struct uart_port *port)
val |= UARTFIFO_TXFLUSH | UARTFIFO_RXFLUSH;
lpuart32_write(&sport->port, val, UARTFIFO);
} else {
val = readb(sport->port.membase + UARTPFIFO);
val = readb(sport->port.membase + UARTCFIFO);
val |= UARTCFIFO_TXFLUSH | UARTCFIFO_RXFLUSH;
writeb(val, sport->port.membase + UARTCFIFO);
}

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

@ -2222,8 +2222,8 @@ static int imx_uart_probe(struct platform_device *pdev)
return PTR_ERR(base);
rxirq = platform_get_irq(pdev, 0);
txirq = platform_get_irq(pdev, 1);
rtsirq = platform_get_irq(pdev, 2);
txirq = platform_get_irq_optional(pdev, 1);
rtsirq = platform_get_irq_optional(pdev, 2);
sport->port.dev = &pdev->dev;
sport->port.mapbase = res->start;

2
drivers/tty/serial/owl-uart.c
View File

@ -740,7 +740,7 @@ static int __init owl_uart_init(void)
return ret;
}
static void __init owl_uart_exit(void)
static void __exit owl_uart_exit(void)
{
platform_driver_unregister(&owl_uart_platform_driver);
uart_unregister_driver(&owl_uart_driver);

2
drivers/tty/serial/rda-uart.c
View File

@ -815,7 +815,7 @@ static int __init rda_uart_init(void)
return ret;
}
static void __init rda_uart_exit(void)
static void __exit rda_uart_exit(void)
{
platform_driver_unregister(&rda_uart_platform_driver);
uart_unregister_driver(&rda_uart_driver);

2
drivers/tty/serial/serial_core.c
View File

@ -1964,8 +1964,10 @@ uart_get_console(struct uart_port *ports, int nr, struct console *co)
* console=<name>,io|mmio|mmio16|mmio32|mmio32be|mmio32native,<addr>,<options>
*
* The optional form
*
* earlycon=<name>,0x<addr>,<options>
* console=<name>,0x<addr>,<options>
*
* is also accepted; the returned @iotype will be UPIO_MEM.
*
* Returns 0 on success or -EINVAL on failure

3
drivers/tty/serial/serial_mctrl_gpio.c
View File

@ -66,6 +66,9 @@ EXPORT_SYMBOL_GPL(mctrl_gpio_set);
struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios,
enum mctrl_gpio_idx gidx)
{
if (gpios == NULL)
return NULL;
return gpios->gpio[gidx];
}
EXPORT_SYMBOL_GPL(mctrl_gpio_to_gpiod);

8
drivers/tty/serial/sh-sci.c
View File

@ -2894,8 +2894,12 @@ static int sci_init_single(struct platform_device *dev,
port->mapbase = res->start;
sci_port->reg_size = resource_size(res);
for (i = 0; i < ARRAY_SIZE(sci_port->irqs); ++i)
sci_port->irqs[i] = platform_get_irq(dev, i);
for (i = 0; i < ARRAY_SIZE(sci_port->irqs); ++i) {
if (i)
sci_port->irqs[i] = platform_get_irq_optional(dev, i);
else
sci_port->irqs[i] = platform_get_irq(dev, i);
}
/* The SCI generates several interrupts. They can be muxed together or
* connected to different interrupt lines. In the muxed case only one

3
drivers/tty/serial/uartlite.c
View File

@ -897,7 +897,8 @@ static int __init ulite_init(void)
static void __exit ulite_exit(void)
{
platform_driver_unregister(&ulite_platform_driver);
uart_unregister_driver(&ulite_uart_driver);
if (ulite_uart_driver.state)
uart_unregister_driver(&ulite_uart_driver);
}
module_init(ulite_init);

8
drivers/tty/serial/xilinx_uartps.c
View File

@ -1550,7 +1550,6 @@ static int cdns_uart_probe(struct platform_device *pdev)
goto err_out_id;
}
uartps_major = cdns_uart_uart_driver->tty_driver->major;
cdns_uart_data->cdns_uart_driver = cdns_uart_uart_driver;
/*
@ -1680,6 +1679,7 @@ static int cdns_uart_probe(struct platform_device *pdev)
console_port = NULL;
#endif
uartps_major = cdns_uart_uart_driver->tty_driver->major;
cdns_uart_data->cts_override = of_property_read_bool(pdev->dev.of_node,
"cts-override");
return 0;
@ -1741,6 +1741,12 @@ static int cdns_uart_remove(struct platform_device *pdev)
console_port = NULL;
#endif
/* If this is last instance major number should be initialized */
mutex_lock(&bitmap_lock);
if (bitmap_empty(bitmap, MAX_UART_INSTANCES))
uartps_major = 0;
mutex_unlock(&bitmap_lock);
uart_unregister_driver(cdns_uart_data->cdns_uart_driver);
return rc;
}

2
include/uapi/linux/serial_core.h
View File

@ -291,6 +291,6 @@
#define PORT_SUNIX 121
/* Freescale Linflex UART */
#define PORT_LINFLEXUART 121
#define PORT_LINFLEXUART 122
#endif /* _UAPILINUX_SERIAL_CORE_H */