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TTY/Serial driver fixes for 4.2-rc4

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Here are a number of small serial and tty fixes for reported issues.
 
 All have been in linux-next successfully.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver fixes from Greg KH:
 "Here are a number of small serial and tty fixes for reported issues.

  All have been in linux-next successfully"

* tag 'tty-4.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  tty: vt: Fix !TASK_RUNNING diagnostic warning from paste_selection()
  serial: core: Fix crashes while echoing when closing
  m32r: Add ioreadXX/iowriteXX big-endian mmio accessors
  Revert "serial: imx: initialized DMA w/o HW flow enabled"
  sc16is7xx: fix FIFO address of secondary UART
  sc16is7xx: fix Kconfig dependencies
  serial: etraxfs-uart: Fix release etraxfs_uart_ports
  tty/vt: Fix the memory leak in visual_init
  serial: amba-pl011: Fix devm_ioremap_resource return value check
  n_tty: signal and flush atomically
This commit is contained in:
Linus Torvalds 2015-07-25 20:05:07 -07:00
commit 82b35f376c
10 changed files with 57 additions and 23 deletions
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5
arch/m32r/include/asm/io.h
View File

@ -174,6 +174,11 @@ static inline void _writel(unsigned long l, unsigned long addr)
#define iowrite16 writew
#define iowrite32 writel
#define ioread16be(addr) be16_to_cpu(readw(addr))
#define ioread32be(addr) be32_to_cpu(readl(addr))
#define iowrite16be(v, addr) writew(cpu_to_be16(v), (addr))
#define iowrite32be(v, addr) writel(cpu_to_be32(v), (addr))
#define mmiowb()
#define flush_write_buffers() do { } while (0) /* M32R_FIXME */

16
drivers/tty/n_tty.c
View File

@ -1108,19 +1108,29 @@ static void eraser(unsigned char c, struct tty_struct *tty)
* Locking: ctrl_lock
*/
static void isig(int sig, struct tty_struct *tty)
static void __isig(int sig, struct tty_struct *tty)
{
struct n_tty_data *ldata = tty->disc_data;
struct pid *tty_pgrp = tty_get_pgrp(tty);
if (tty_pgrp) {
kill_pgrp(tty_pgrp, sig, 1);
put_pid(tty_pgrp);
}
}
if (!L_NOFLSH(tty)) {
static void isig(int sig, struct tty_struct *tty)
{
struct n_tty_data *ldata = tty->disc_data;
if (L_NOFLSH(tty)) {
/* signal only */
__isig(sig, tty);
} else { /* signal and flush */
up_read(&tty->termios_rwsem);
down_write(&tty->termios_rwsem);
__isig(sig, tty);
/* clear echo buffer */
mutex_lock(&ldata->output_lock);
ldata->echo_head = ldata->echo_tail = 0;

2
drivers/tty/serial/Kconfig
View File

@ -1185,7 +1185,7 @@ config SERIAL_SC16IS7XX_CORE
config SERIAL_SC16IS7XX
tristate "SC16IS7xx serial support"
select SERIAL_CORE
depends on I2C || SPI_MASTER
depends on (SPI_MASTER && !I2C) || I2C
help
This selects support for SC16IS7xx serial ports.
Supported ICs are SC16IS740, SC16IS741, SC16IS750, SC16IS752,

4
drivers/tty/serial/amba-pl011.c
View File

@ -2310,8 +2310,8 @@ static int pl011_setup_port(struct device *dev, struct uart_amba_port *uap,
void __iomem *base;
base = devm_ioremap_resource(dev, mmiobase);
if (!base)
return -ENOMEM;
if (IS_ERR(base))
return PTR_ERR(base);
index = pl011_probe_dt_alias(index, dev);

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

@ -950,7 +950,7 @@ static int etraxfs_uart_remove(struct platform_device *pdev)
port = platform_get_drvdata(pdev);
uart_remove_one_port(&etraxfs_uart_driver, port);
etraxfs_uart_ports[pdev->id] = NULL;
etraxfs_uart_ports[port->line] = NULL;
return 0;
}

15
drivers/tty/serial/imx.c
View File

@ -1121,11 +1121,6 @@ static int imx_startup(struct uart_port *port)
writel(temp & ~UCR4_DREN, sport->port.membase + UCR4);
/* Can we enable the DMA support? */
if (is_imx6q_uart(sport) && !uart_console(port) &&
!sport->dma_is_inited)
imx_uart_dma_init(sport);
spin_lock_irqsave(&sport->port.lock, flags);
/* Reset fifo's and state machines */
i = 100;
@ -1143,9 +1138,6 @@ static int imx_startup(struct uart_port *port)
writel(USR1_RTSD, sport->port.membase + USR1);
writel(USR2_ORE, sport->port.membase + USR2);
if (sport->dma_is_inited && !sport->dma_is_enabled)
imx_enable_dma(sport);
temp = readl(sport->port.membase + UCR1);
temp |= UCR1_RRDYEN | UCR1_RTSDEN | UCR1_UARTEN;
@ -1316,6 +1308,11 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios,
} else {
ucr2 |= UCR2_CTSC;
}
/* Can we enable the DMA support? */
if (is_imx6q_uart(sport) && !uart_console(port)
&& !sport->dma_is_inited)
imx_uart_dma_init(sport);
} else {
termios->c_cflag &= ~CRTSCTS;
}
@ -1432,6 +1429,8 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios,
if (UART_ENABLE_MS(&sport->port, termios->c_cflag))
imx_enable_ms(&sport->port);
if (sport->dma_is_inited && !sport->dma_is_enabled)
imx_enable_dma(sport);
spin_unlock_irqrestore(&sport->port.lock, flags);
}

30
drivers/tty/serial/sc16is7xx.c
View File

@ -354,6 +354,26 @@ static void sc16is7xx_port_write(struct uart_port *port, u8 reg, u8 val)
(reg << SC16IS7XX_REG_SHIFT) | port->line, val);
}
static void sc16is7xx_fifo_read(struct uart_port *port, unsigned int rxlen)
{
struct sc16is7xx_port *s = dev_get_drvdata(port->dev);
u8 addr = (SC16IS7XX_RHR_REG << SC16IS7XX_REG_SHIFT) | port->line;
regcache_cache_bypass(s->regmap, true);
regmap_raw_read(s->regmap, addr, s->buf, rxlen);
regcache_cache_bypass(s->regmap, false);
}
static void sc16is7xx_fifo_write(struct uart_port *port, u8 to_send)
{
struct sc16is7xx_port *s = dev_get_drvdata(port->dev);
u8 addr = (SC16IS7XX_THR_REG << SC16IS7XX_REG_SHIFT) | port->line;
regcache_cache_bypass(s->regmap, true);
regmap_raw_write(s->regmap, addr, s->buf, to_send);
regcache_cache_bypass(s->regmap, false);
}
static void sc16is7xx_port_update(struct uart_port *port, u8 reg,
u8 mask, u8 val)
{
@ -508,10 +528,7 @@ static void sc16is7xx_handle_rx(struct uart_port *port, unsigned int rxlen,
s->buf[0] = sc16is7xx_port_read(port, SC16IS7XX_RHR_REG);
bytes_read = 1;
} else {
regcache_cache_bypass(s->regmap, true);
regmap_raw_read(s->regmap, SC16IS7XX_RHR_REG,
s->buf, rxlen);
regcache_cache_bypass(s->regmap, false);
sc16is7xx_fifo_read(port, rxlen);
bytes_read = rxlen;
}
@ -591,9 +608,8 @@ static void sc16is7xx_handle_tx(struct uart_port *port)
s->buf[i] = xmit->buf[xmit->tail];
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
}
regcache_cache_bypass(s->regmap, true);
regmap_raw_write(s->regmap, SC16IS7XX_THR_REG, s->buf, to_send);
regcache_cache_bypass(s->regmap, false);
sc16is7xx_fifo_write(port, to_send);
}
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)

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

@ -1418,7 +1418,7 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
mutex_lock(&port->mutex);
uart_shutdown(tty, state);
tty_port_tty_set(port, NULL);
tty->closing = 0;
spin_lock_irqsave(&port->lock, flags);
if (port->blocked_open) {
@ -1444,6 +1444,7 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
mutex_unlock(&port->mutex);
tty_ldisc_flush(tty);
tty->closing = 0;
}
static void uart_wait_until_sent(struct tty_struct *tty, int timeout)

1
drivers/tty/vt/selection.c
View File

@ -356,6 +356,7 @@ int paste_selection(struct tty_struct *tty)
schedule();
continue;
}
__set_current_state(TASK_RUNNING);
count = sel_buffer_lth - pasted;
count = tty_ldisc_receive_buf(ld, sel_buffer + pasted, NULL,
count);

2
drivers/tty/vt/vt.c
View File

@ -742,6 +742,8 @@ static void visual_init(struct vc_data *vc, int num, int init)
__module_get(vc->vc_sw->owner);
vc->vc_num = num;
vc->vc_display_fg = &master_display_fg;
if (vc->vc_uni_pagedir_loc)
con_free_unimap(vc);
vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
vc->vc_uni_pagedir = NULL;
vc->vc_hi_font_mask = 0;