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-rw-r--r--drivers/tty/cyclades.c6
-rw-r--r--drivers/tty/goldfish.c2
-rw-r--r--drivers/tty/moxa.c4
-rw-r--r--drivers/tty/n_gsm.c90
-rw-r--r--drivers/tty/pty.c14
-rw-r--r--drivers/tty/serial/8250/8250_dw.c3
-rw-r--r--drivers/tty/serial/8250/8250_port.c4
-rw-r--r--drivers/tty/serial/amba-pl011.c23
-rw-r--r--drivers/tty/serial/fsl_lpuart.c4
-rw-r--r--drivers/tty/serial/lpc32xx_hs.c2
-rw-r--r--drivers/tty/serial/mvebu-uart.c36
-rw-r--r--drivers/tty/serial/samsung.c5
-rw-r--r--drivers/tty/serial/serial-tegra.c5
-rw-r--r--drivers/tty/serial/stm32-usart.c2
-rw-r--r--drivers/tty/serial/ucc_uart.c2
-rw-r--r--drivers/tty/tty_buffer.c66
-rw-r--r--drivers/tty/vt/keyboard.c6
-rw-r--r--drivers/tty/vt/vt.c55
-rw-r--r--drivers/tty/vt/vt_ioctl.c149
19 files changed, 209 insertions, 269 deletions
diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
index 6d3c58051..db048dbe9 100644
--- a/drivers/tty/cyclades.c
+++ b/drivers/tty/cyclades.c
@@ -556,7 +556,7 @@ static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
}
info->idle_stats.recv_idle = jiffies;
}
- tty_schedule_flip(port);
+ tty_flip_buffer_push(port);
/* end of service */
cyy_writeb(info, CyRIR, save_xir & 0x3f);
@@ -996,7 +996,7 @@ static void cyz_handle_rx(struct cyclades_port *info)
mod_timer(&info->rx_full_timer, jiffies + 1);
#endif
info->idle_stats.recv_idle = jiffies;
- tty_schedule_flip(&info->port);
+ tty_flip_buffer_push(&info->port);
/* Update rx_get */
cy_writel(&buf_ctrl->rx_get, new_rx_get);
@@ -1172,7 +1172,7 @@ static void cyz_handle_cmd(struct cyclades_card *cinfo)
if (delta_count)
wake_up_interruptible(&info->port.delta_msr_wait);
if (special_count)
- tty_schedule_flip(&info->port);
+ tty_flip_buffer_push(&info->port);
}
}
diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c
index 9180ca5e4..d6e82eb61 100644
--- a/drivers/tty/goldfish.c
+++ b/drivers/tty/goldfish.c
@@ -151,7 +151,7 @@ static irqreturn_t goldfish_tty_interrupt(int irq, void *dev_id)
address = (unsigned long)(void *)buf;
goldfish_tty_rw(qtty, address, count, 0);
- tty_schedule_flip(&qtty->port);
+ tty_flip_buffer_push(&qtty->port);
return IRQ_HANDLED;
}
diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index 250a19f04..181381fa5 100644
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -1393,7 +1393,7 @@ static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
if (inited && !tty_throttled(tty) &&
MoxaPortRxQueue(p) > 0) { /* RX */
MoxaPortReadData(p);
- tty_schedule_flip(&p->port);
+ tty_flip_buffer_push(&p->port);
}
} else {
clear_bit(EMPTYWAIT, &p->statusflags);
@@ -1418,7 +1418,7 @@ static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
tty_insert_flip_char(&p->port, 0, TTY_BREAK);
- tty_schedule_flip(&p->port);
+ tty_flip_buffer_push(&p->port);
}
if (intr & IntrLine)
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 5d2bb4d95..f6d2be13b 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -411,6 +411,27 @@ static int gsm_read_ea(unsigned int *val, u8 c)
}
/**
+ * gsm_read_ea_val - read a value until EA
+ * @val: variable holding value
+ * @data: buffer of data
+ * @dlen: length of data
+ *
+ * Processes an EA value. Updates the passed variable and
+ * returns the processed data length.
+ */
+static unsigned int gsm_read_ea_val(unsigned int *val, const u8 *data, int dlen)
+{
+ unsigned int len = 0;
+
+ for (; dlen > 0; dlen--) {
+ len++;
+ if (gsm_read_ea(val, *data++))
+ break;
+ }
+ return len;
+}
+
+/**
* gsm_encode_modem - encode modem data bits
* @dlci: DLCI to encode from
*
@@ -658,6 +679,37 @@ static struct gsm_msg *gsm_data_alloc(struct gsm_mux *gsm, u8 addr, int len,
}
/**
+ * gsm_is_flow_ctrl_msg - checks if flow control message
+ * @msg: message to check
+ *
+ * Returns true if the given message is a flow control command of the
+ * control channel. False is returned in any other case.
+ */
+static bool gsm_is_flow_ctrl_msg(struct gsm_msg *msg)
+{
+ unsigned int cmd;
+
+ if (msg->addr > 0)
+ return false;
+
+ switch (msg->ctrl & ~PF) {
+ case UI:
+ case UIH:
+ cmd = 0;
+ if (gsm_read_ea_val(&cmd, msg->data + 2, msg->len - 2) < 1)
+ break;
+ switch (cmd & ~PF) {
+ case CMD_FCOFF:
+ case CMD_FCON:
+ return true;
+ }
+ break;
+ }
+
+ return false;
+}
+
+/**
* gsm_data_kick - poke the queue
* @gsm: GSM Mux
*
@@ -675,7 +727,7 @@ static void gsm_data_kick(struct gsm_mux *gsm, struct gsm_dlci *dlci)
int len;
list_for_each_entry_safe(msg, nmsg, &gsm->tx_list, list) {
- if (gsm->constipated && msg->addr)
+ if (gsm->constipated && !gsm_is_flow_ctrl_msg(msg))
continue;
if (gsm->encoding != 0) {
gsm->txframe[0] = GSM1_SOF;
@@ -1330,7 +1382,7 @@ static void gsm_control_retransmit(struct timer_list *t)
spin_lock_irqsave(&gsm->control_lock, flags);
ctrl = gsm->pending_cmd;
if (ctrl) {
- if (gsm->cretries == 0) {
+ if (gsm->cretries == 0 || !gsm->dlci[0] || gsm->dlci[0]->dead) {
gsm->pending_cmd = NULL;
ctrl->error = -ETIMEDOUT;
ctrl->done = 1;
@@ -1482,8 +1534,8 @@ static void gsm_dlci_t1(struct timer_list *t)
switch (dlci->state) {
case DLCI_OPENING:
- dlci->retries--;
if (dlci->retries) {
+ dlci->retries--;
gsm_command(dlci->gsm, dlci->addr, SABM|PF);
mod_timer(&dlci->t1, jiffies + gsm->t1 * HZ / 100);
} else if (!dlci->addr && gsm->control == (DM | PF)) {
@@ -1498,8 +1550,8 @@ static void gsm_dlci_t1(struct timer_list *t)
break;
case DLCI_CLOSING:
- dlci->retries--;
if (dlci->retries) {
+ dlci->retries--;
gsm_command(dlci->gsm, dlci->addr, DISC|PF);
mod_timer(&dlci->t1, jiffies + gsm->t1 * HZ / 100);
} else
@@ -1840,7 +1892,7 @@ static void gsm_queue(struct gsm_mux *gsm)
goto invalid;
#endif
if (dlci == NULL || dlci->state != DLCI_OPEN) {
- gsm_command(gsm, address, DM|PF);
+ gsm_response(gsm, address, DM|PF);
return;
}
dlci->data(dlci, gsm->buf, gsm->len);
@@ -2467,11 +2519,24 @@ static ssize_t gsmld_read(struct tty_struct *tty, struct file *file,
static ssize_t gsmld_write(struct tty_struct *tty, struct file *file,
const unsigned char *buf, size_t nr)
{
- int space = tty_write_room(tty);
+ struct gsm_mux *gsm = tty->disc_data;
+ unsigned long flags;
+ int space;
+ int ret;
+
+ if (!gsm)
+ return -ENODEV;
+
+ ret = -ENOBUFS;
+ spin_lock_irqsave(&gsm->tx_lock, flags);
+ space = tty_write_room(tty);
if (space >= nr)
- return tty->ops->write(tty, buf, nr);
- set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
- return -ENOBUFS;
+ ret = tty->ops->write(tty, buf, nr);
+ else
+ set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
+ spin_unlock_irqrestore(&gsm->tx_lock, flags);
+
+ return ret;
}
/**
@@ -2496,12 +2561,15 @@ static __poll_t gsmld_poll(struct tty_struct *tty, struct file *file,
poll_wait(file, &tty->read_wait, wait);
poll_wait(file, &tty->write_wait, wait);
+
+ if (gsm->dead)
+ mask |= EPOLLHUP;
if (tty_hung_up_p(file))
mask |= EPOLLHUP;
+ if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
+ mask |= EPOLLHUP;
if (!tty_is_writelocked(tty) && tty_write_room(tty) > 0)
mask |= EPOLLOUT | EPOLLWRNORM;
- if (gsm->dead)
- mask |= EPOLLHUP;
return mask;
}
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index c6a1d8c4e..73226e482 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -111,21 +111,11 @@ static void pty_unthrottle(struct tty_struct *tty)
static int pty_write(struct tty_struct *tty, const unsigned char *buf, int c)
{
struct tty_struct *to = tty->link;
- unsigned long flags;
- if (tty->stopped)
+ if (tty->stopped || !c)
return 0;
- if (c > 0) {
- spin_lock_irqsave(&to->port->lock, flags);
- /* Stuff the data into the input queue of the other end */
- c = tty_insert_flip_string(to->port, buf, c);
- spin_unlock_irqrestore(&to->port->lock, flags);
- /* And shovel */
- if (c)
- tty_flip_buffer_push(to->port);
- }
- return c;
+ return tty_insert_flip_string_and_push_buffer(to->port, buf, c);
}
/**
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index c73d0eddd..cc9d1f416 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -140,12 +140,15 @@ static void dw8250_check_lcr(struct uart_port *p, int value)
/* Returns once the transmitter is empty or we run out of retries */
static void dw8250_tx_wait_empty(struct uart_port *p)
{
+ struct uart_8250_port *up = up_to_u8250p(p);
unsigned int tries = 20000;
unsigned int delay_threshold = tries - 1000;
unsigned int lsr;
while (tries--) {
lsr = readb (p->membase + (UART_LSR << p->regshift));
+ up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS;
+
if (lsr & UART_LSR_TEMT)
break;
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 5a2e67a8d..f11d12025 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -2917,8 +2917,10 @@ static int serial8250_request_std_resource(struct uart_8250_port *up)
case UPIO_MEM32BE:
case UPIO_MEM16:
case UPIO_MEM:
- if (!port->mapbase)
+ if (!port->mapbase) {
+ ret = -EINVAL;
break;
+ }
if (!request_mem_region(port->mapbase, size, "serial")) {
ret = -EBUSY;
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 5edc3813a..7de4bed1d 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1335,6 +1335,15 @@ static void pl011_stop_rx(struct uart_port *port)
pl011_dma_rx_stop(uap);
}
+static void pl011_throttle_rx(struct uart_port *port)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&port->lock, flags);
+ pl011_stop_rx(port);
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
static void pl011_enable_ms(struct uart_port *port)
{
struct uart_amba_port *uap =
@@ -1728,9 +1737,10 @@ static int pl011_allocate_irq(struct uart_amba_port *uap)
*/
static void pl011_enable_interrupts(struct uart_amba_port *uap)
{
+ unsigned long flags;
unsigned int i;
- spin_lock_irq(&uap->port.lock);
+ spin_lock_irqsave(&uap->port.lock, flags);
/* Clear out any spuriously appearing RX interrupts */
pl011_write(UART011_RTIS | UART011_RXIS, uap, REG_ICR);
@@ -1752,7 +1762,14 @@ static void pl011_enable_interrupts(struct uart_amba_port *uap)
if (!pl011_dma_rx_running(uap))
uap->im |= UART011_RXIM;
pl011_write(uap->im, uap, REG_IMSC);
- spin_unlock_irq(&uap->port.lock);
+ spin_unlock_irqrestore(&uap->port.lock, flags);
+}
+
+static void pl011_unthrottle_rx(struct uart_port *port)
+{
+ struct uart_amba_port *uap = container_of(port, struct uart_amba_port, port);
+
+ pl011_enable_interrupts(uap);
}
static int pl011_startup(struct uart_port *port)
@@ -2127,6 +2144,8 @@ static const struct uart_ops amba_pl011_pops = {
.stop_tx = pl011_stop_tx,
.start_tx = pl011_start_tx,
.stop_rx = pl011_stop_rx,
+ .throttle = pl011_throttle_rx,
+ .unthrottle = pl011_unthrottle_rx,
.enable_ms = pl011_enable_ms,
.break_ctl = pl011_break_ctl,
.startup = pl011_startup,
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index b757fd1bd..069d02354 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1102,9 +1102,9 @@ static int lpuart_config_rs485(struct uart_port *port,
* Note: UART is assumed to be active high.
*/
if (rs485->flags & SER_RS485_RTS_ON_SEND)
- modem &= ~UARTMODEM_TXRTSPOL;
- else if (rs485->flags & SER_RS485_RTS_AFTER_SEND)
modem |= UARTMODEM_TXRTSPOL;
+ else if (rs485->flags & SER_RS485_RTS_AFTER_SEND)
+ modem &= ~UARTMODEM_TXRTSPOL;
}
/* Store the new configuration */
diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c
index d1d732615..9c145ed0d 100644
--- a/drivers/tty/serial/lpc32xx_hs.c
+++ b/drivers/tty/serial/lpc32xx_hs.c
@@ -341,7 +341,7 @@ static irqreturn_t serial_lpc32xx_interrupt(int irq, void *dev_id)
LPC32XX_HSUART_IIR(port->membase));
port->icount.overrun++;
tty_insert_flip_char(tport, 0, TTY_OVERRUN);
- tty_schedule_flip(tport);
+ tty_flip_buffer_push(tport);
}
/* Data received? */
diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c
index 77f3f3728..70f74ebc2 100644
--- a/drivers/tty/serial/mvebu-uart.c
+++ b/drivers/tty/serial/mvebu-uart.c
@@ -237,6 +237,7 @@ static void mvebu_uart_rx_chars(struct uart_port *port, unsigned int status)
struct tty_port *tport = &port->state->port;
unsigned char ch = 0;
char flag = 0;
+ int ret;
do {
if (status & STAT_RX_RDY(port)) {
@@ -249,6 +250,16 @@ static void mvebu_uart_rx_chars(struct uart_port *port, unsigned int status)
port->icount.parity++;
}
+ /*
+ * For UART2, error bits are not cleared on buffer read.
+ * This causes interrupt loop and system hang.
+ */
+ if (IS_EXTENDED(port) && (status & STAT_BRK_ERR)) {
+ ret = readl(port->membase + UART_STAT);
+ ret |= STAT_BRK_ERR;
+ writel(ret, port->membase + UART_STAT);
+ }
+
if (status & STAT_BRK_DET) {
port->icount.brk++;
status &= ~(STAT_FRM_ERR | STAT_PAR_ERR);
@@ -442,14 +453,14 @@ static void mvebu_uart_shutdown(struct uart_port *port)
}
}
-static int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud)
+static unsigned int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud)
{
struct mvebu_uart *mvuart = to_mvuart(port);
unsigned int d_divisor, m_divisor;
u32 brdv;
if (IS_ERR(mvuart->clk))
- return -PTR_ERR(mvuart->clk);
+ return 0;
/*
* The baudrate is derived from the UART clock thanks to two divisors:
@@ -469,7 +480,7 @@ static int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud)
brdv |= d_divisor;
writel(brdv, port->membase + UART_BRDV);
- return 0;
+ return DIV_ROUND_CLOSEST(port->uartclk, d_divisor * m_divisor);
}
static void mvebu_uart_set_termios(struct uart_port *port,
@@ -506,15 +517,11 @@ static void mvebu_uart_set_termios(struct uart_port *port,
max_baud = 230400;
baud = uart_get_baud_rate(port, termios, old, min_baud, max_baud);
- if (mvebu_uart_baud_rate_set(port, baud)) {
- /* No clock available, baudrate cannot be changed */
- if (old)
- baud = uart_get_baud_rate(port, old, NULL,
- min_baud, max_baud);
- } else {
- tty_termios_encode_baud_rate(termios, baud, baud);
- uart_update_timeout(port, termios->c_cflag, baud);
- }
+ baud = mvebu_uart_baud_rate_set(port, baud);
+
+ /* In case baudrate cannot be changed, report previous old value */
+ if (baud == 0 && old)
+ baud = tty_termios_baud_rate(old);
/* Only the following flag changes are supported */
if (old) {
@@ -525,6 +532,11 @@ static void mvebu_uart_set_termios(struct uart_port *port,
termios->c_cflag |= CS8;
}
+ if (baud != 0) {
+ tty_termios_encode_baud_rate(termios, baud, baud);
+ uart_update_timeout(port, termios->c_cflag, baud);
+ }
+
spin_unlock_irqrestore(&port->lock, flags);
}
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 49661cef5..964d6d33b 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -238,8 +238,7 @@ static void enable_tx_dma(struct s3c24xx_uart_port *ourport)
/* Enable tx dma mode */
ucon = rd_regl(port, S3C2410_UCON);
ucon &= ~(S3C64XX_UCON_TXBURST_MASK | S3C64XX_UCON_TXMODE_MASK);
- ucon |= (dma_get_cache_alignment() >= 16) ?
- S3C64XX_UCON_TXBURST_16 : S3C64XX_UCON_TXBURST_1;
+ ucon |= S3C64XX_UCON_TXBURST_1;
ucon |= S3C64XX_UCON_TXMODE_DMA;
wr_regl(port, S3C2410_UCON, ucon);
@@ -512,7 +511,7 @@ static void enable_rx_dma(struct s3c24xx_uart_port *ourport)
S3C64XX_UCON_DMASUS_EN |
S3C64XX_UCON_TIMEOUT_EN |
S3C64XX_UCON_RXMODE_MASK);
- ucon |= S3C64XX_UCON_RXBURST_16 |
+ ucon |= S3C64XX_UCON_RXBURST_1 |
0xf << S3C64XX_UCON_TIMEOUT_SHIFT |
S3C64XX_UCON_EMPTYINT_EN |
S3C64XX_UCON_TIMEOUT_EN |
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c
index af2a29cfb..ee480a148 100644
--- a/drivers/tty/serial/serial-tegra.c
+++ b/drivers/tty/serial/serial-tegra.c
@@ -398,7 +398,7 @@ static void tegra_uart_tx_dma_complete(void *args)
count = tup->tx_bytes_requested - state.residue;
async_tx_ack(tup->tx_dma_desc);
spin_lock_irqsave(&tup->uport.lock, flags);
- xmit->tail = (xmit->tail + count) & (UART_XMIT_SIZE - 1);
+ uart_xmit_advance(&tup->uport, count);
tup->tx_in_progress = 0;
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(&tup->uport);
@@ -482,7 +482,6 @@ static unsigned int tegra_uart_tx_empty(struct uart_port *u)
static void tegra_uart_stop_tx(struct uart_port *u)
{
struct tegra_uart_port *tup = to_tegra_uport(u);
- struct circ_buf *xmit = &tup->uport.state->xmit;
struct dma_tx_state state;
unsigned int count;
@@ -493,7 +492,7 @@ static void tegra_uart_stop_tx(struct uart_port *u)
dmaengine_tx_status(tup->tx_dma_chan, tup->tx_cookie, &state);
count = tup->tx_bytes_requested - state.residue;
async_tx_ack(tup->tx_dma_desc);
- xmit->tail = (xmit->tail + count) & (UART_XMIT_SIZE - 1);
+ uart_xmit_advance(&tup->uport, count);
tup->tx_in_progress = 0;
}
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index bb2f6f02c..d8e1b0356 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -72,6 +72,8 @@ static void stm32_config_reg_rs485(u32 *cr1, u32 *cr3, u32 delay_ADE,
*cr3 |= USART_CR3_DEM;
over8 = *cr1 & USART_CR1_OVER8;
+ *cr1 &= ~(USART_CR1_DEDT_MASK | USART_CR1_DEAT_MASK);
+
if (over8)
rs485_deat_dedt = delay_ADE * baud * 8;
else
diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c
index 2b6376e6e..eb0d3f552 100644
--- a/drivers/tty/serial/ucc_uart.c
+++ b/drivers/tty/serial/ucc_uart.c
@@ -1141,6 +1141,8 @@ static unsigned int soc_info(unsigned int *rev_h, unsigned int *rev_l)
/* No compatible property, so try the name. */
soc_string = np->name;
+ of_node_put(np);
+
/* Extract the SOC number from the "PowerPC," string */
if ((sscanf(soc_string, "PowerPC,%u", &soc) != 1) || !soc)
return 0;
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index dfe0c8c22..3ef4899c8 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -390,27 +390,6 @@ int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag)
EXPORT_SYMBOL(__tty_insert_flip_char);
/**
- * tty_schedule_flip - push characters to ldisc
- * @port: tty port to push from
- *
- * Takes any pending buffers and transfers their ownership to the
- * ldisc side of the queue. It then schedules those characters for
- * processing by the line discipline.
- */
-
-void tty_schedule_flip(struct tty_port *port)
-{
- struct tty_bufhead *buf = &port->buf;
-
- /* paired w/ acquire in flush_to_ldisc(); ensures
- * flush_to_ldisc() sees buffer data.
- */
- smp_store_release(&buf->tail->commit, buf->tail->used);
- queue_work(system_unbound_wq, &buf->work);
-}
-EXPORT_SYMBOL(tty_schedule_flip);
-
-/**
* tty_prepare_flip_string - make room for characters
* @port: tty port
* @chars: return pointer for character write area
@@ -539,6 +518,15 @@ static void flush_to_ldisc(struct work_struct *work)
}
+static inline void tty_flip_buffer_commit(struct tty_buffer *tail)
+{
+ /*
+ * Paired w/ acquire in flush_to_ldisc(); ensures flush_to_ldisc() sees
+ * buffer data.
+ */
+ smp_store_release(&tail->commit, tail->used);
+}
+
/**
* tty_flip_buffer_push - terminal
* @port: tty port to push
@@ -552,11 +540,45 @@ static void flush_to_ldisc(struct work_struct *work)
void tty_flip_buffer_push(struct tty_port *port)
{
- tty_schedule_flip(port);
+ struct tty_bufhead *buf = &port->buf;
+
+ tty_flip_buffer_commit(buf->tail);
+ queue_work(system_unbound_wq, &buf->work);
}
EXPORT_SYMBOL(tty_flip_buffer_push);
/**
+ * tty_insert_flip_string_and_push_buffer - add characters to the tty buffer and
+ * push
+ * @port: tty port
+ * @chars: characters
+ * @size: size
+ *
+ * The function combines tty_insert_flip_string() and tty_flip_buffer_push()
+ * with the exception of properly holding the @port->lock.
+ *
+ * To be used only internally (by pty currently).
+ *
+ * Returns: the number added.
+ */
+int tty_insert_flip_string_and_push_buffer(struct tty_port *port,
+ const unsigned char *chars, size_t size)
+{
+ struct tty_bufhead *buf = &port->buf;
+ unsigned long flags;
+
+ spin_lock_irqsave(&port->lock, flags);
+ size = tty_insert_flip_string(port, chars, size);
+ if (size)
+ tty_flip_buffer_commit(buf->tail);
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ queue_work(system_unbound_wq, &buf->work);
+
+ return size;
+}
+
+/**
* tty_buffer_init - prepare a tty buffer structure
* @tty: tty to initialise
*
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c
index 94cad9f86..e3aac11d7 100644
--- a/drivers/tty/vt/keyboard.c
+++ b/drivers/tty/vt/keyboard.c
@@ -310,7 +310,7 @@ int kbd_rate(struct kbd_repeat *rpt)
static void put_queue(struct vc_data *vc, int ch)
{
tty_insert_flip_char(&vc->port, ch, 0);
- tty_schedule_flip(&vc->port);
+ tty_flip_buffer_push(&vc->port);
}
static void puts_queue(struct vc_data *vc, char *cp)
@@ -319,7 +319,7 @@ static void puts_queue(struct vc_data *vc, char *cp)
tty_insert_flip_char(&vc->port, *cp, 0);
cp++;
}
- tty_schedule_flip(&vc->port);
+ tty_flip_buffer_push(&vc->port);
}
static void applkey(struct vc_data *vc, int key, char mode)
@@ -564,7 +564,7 @@ static void fn_inc_console(struct vc_data *vc)
static void fn_send_intr(struct vc_data *vc)
{
tty_insert_flip_char(&vc->port, 0, TTY_BREAK);
- tty_schedule_flip(&vc->port);
+ tty_flip_buffer_push(&vc->port);
}
static void fn_scroll_forw(struct vc_data *vc)
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 72e3989df..c9083d853 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -351,7 +351,7 @@ static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows)
/* allocate everything in one go */
memsize = cols * rows * sizeof(char32_t);
memsize += rows * sizeof(char32_t *);
- p = vmalloc(memsize);
+ p = vzalloc(memsize);
if (!p)
return NULL;
@@ -1838,7 +1838,7 @@ static void respond_string(const char *p, struct tty_port *port)
tty_insert_flip_char(port, *p, 0);
p++;
}
- tty_schedule_flip(port);
+ tty_flip_buffer_push(port);
}
static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
@@ -4472,16 +4472,8 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op)
if (op->data && font.charcount > op->charcount)
rc = -ENOSPC;
- if (!(op->flags & KD_FONT_FLAG_OLD)) {
- if (font.width > op->width || font.height > op->height)
- rc = -ENOSPC;
- } else {
- if (font.width != 8)
- rc = -EIO;
- else if ((op->height && font.height > op->height) ||
- font.height > 32)
- rc = -ENOSPC;
- }
+ if (font.width > op->width || font.height > op->height)
+ rc = -ENOSPC;
if (rc)
goto out;
@@ -4509,7 +4501,7 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op)
return -EINVAL;
if (op->charcount > 512)
return -EINVAL;
- if (op->width <= 0 || op->width > 32 || op->height > 32)
+ if (op->width <= 0 || op->width > 32 || !op->height || op->height > 32)
return -EINVAL;
size = (op->width+7)/8 * 32 * op->charcount;
if (size > max_font_size)
@@ -4519,31 +4511,6 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op)
if (IS_ERR(font.data))
return PTR_ERR(font.data);
- if (!op->height) { /* Need to guess font height [compat] */
- int h, i;
- u8 *charmap = font.data;
-
- /*
- * If from KDFONTOP ioctl, don't allow things which can be done
- * in userland,so that we can get rid of this soon
- */
- if (!(op->flags & KD_FONT_FLAG_OLD)) {
- kfree(font.data);
- return -EINVAL;
- }
-
- for (h = 32; h > 0; h--)
- for (i = 0; i < op->charcount; i++)
- if (charmap[32*i+h-1])
- goto nonzero;
-
- kfree(font.data);
- return -EINVAL;
-
- nonzero:
- op->height = h;
- }
-
font.charcount = op->charcount;
font.width = op->width;
font.height = op->height;
@@ -4551,9 +4518,11 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op)
console_lock();
if (vc->vc_mode != KD_TEXT)
rc = -EINVAL;
- else if (vc->vc_sw->con_font_set)
+ else if (vc->vc_sw->con_font_set) {
+ if (vc_is_sel(vc))
+ clear_selection();
rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
- else
+ } else
rc = -ENOSYS;
console_unlock();
kfree(font.data);
@@ -4580,9 +4549,11 @@ static int con_font_default(struct vc_data *vc, struct console_font_op *op)
console_unlock();
return -EINVAL;
}
- if (vc->vc_sw->con_font_default)
+ if (vc->vc_sw->con_font_default) {
+ if (vc_is_sel(vc))
+ clear_selection();
rc = vc->vc_sw->con_font_default(vc, &font, s);
- else
+ } else
rc = -ENOSYS;
console_unlock();
if (!rc) {
diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index 78ae1f090..86efb5493 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -241,48 +241,6 @@ int vt_waitactive(int n)
#define GPLAST 0x3df
#define GPNUM (GPLAST - GPFIRST + 1)
-
-
-static inline int
-do_fontx_ioctl(struct vc_data *vc, int cmd, struct consolefontdesc __user *user_cfd, int perm, struct console_font_op *op)
-{
- struct consolefontdesc cfdarg;
- int i;
-
- if (copy_from_user(&cfdarg, user_cfd, sizeof(struct consolefontdesc)))
- return -EFAULT;
-
- switch (cmd) {
- case PIO_FONTX:
- if (!perm)
- return -EPERM;
- op->op = KD_FONT_OP_SET;
- op->flags = KD_FONT_FLAG_OLD;
- op->width = 8;
- op->height = cfdarg.charheight;
- op->charcount = cfdarg.charcount;
- op->data = cfdarg.chardata;
- return con_font_op(vc, op);
-
- case GIO_FONTX:
- op->op = KD_FONT_OP_GET;
- op->flags = KD_FONT_FLAG_OLD;
- op->width = 8;
- op->height = cfdarg.charheight;
- op->charcount = cfdarg.charcount;
- op->data = cfdarg.chardata;
- i = con_font_op(vc, op);
- if (i)
- return i;
- cfdarg.charheight = op->height;
- cfdarg.charcount = op->charcount;
- if (copy_to_user(user_cfd, &cfdarg, sizeof(struct consolefontdesc)))
- return -EFAULT;
- return 0;
- }
- return -EINVAL;
-}
-
static inline int
do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud, int perm, struct vc_data *vc)
{
@@ -919,30 +877,6 @@ int vt_ioctl(struct tty_struct *tty,
break;
}
- case PIO_FONT: {
- if (!perm)
- return -EPERM;
- op.op = KD_FONT_OP_SET;
- op.flags = KD_FONT_FLAG_OLD | KD_FONT_FLAG_DONT_RECALC; /* Compatibility */
- op.width = 8;
- op.height = 0;
- op.charcount = 256;
- op.data = up;
- ret = con_font_op(vc, &op);
- break;
- }
-
- case GIO_FONT: {
- op.op = KD_FONT_OP_GET;
- op.flags = KD_FONT_FLAG_OLD;
- op.width = 8;
- op.height = 32;
- op.charcount = 256;
- op.data = up;
- ret = con_font_op(vc, &op);
- break;
- }
-
case PIO_CMAP:
if (!perm)
ret = -EPERM;
@@ -954,36 +888,6 @@ int vt_ioctl(struct tty_struct *tty,
ret = con_get_cmap(up);
break;
- case PIO_FONTX:
- case GIO_FONTX:
- ret = do_fontx_ioctl(vc, cmd, up, perm, &op);
- break;
-
- case PIO_FONTRESET:
- {
- if (!perm)
- return -EPERM;
-
-#ifdef BROKEN_GRAPHICS_PROGRAMS
- /* With BROKEN_GRAPHICS_PROGRAMS defined, the default
- font is not saved. */
- ret = -ENOSYS;
- break;
-#else
- {
- op.op = KD_FONT_OP_SET_DEFAULT;
- op.data = NULL;
- ret = con_font_op(vc, &op);
- if (ret)
- break;
- console_lock();
- con_set_default_unimap(vc);
- console_unlock();
- break;
- }
-#endif
- }
-
case KDFONTOP: {
if (copy_from_user(&op, up, sizeof(op))) {
ret = -EFAULT;
@@ -1097,54 +1001,6 @@ void vc_SAK(struct work_struct *work)
#ifdef CONFIG_COMPAT
-struct compat_consolefontdesc {
- unsigned short charcount; /* characters in font (256 or 512) */
- unsigned short charheight; /* scan lines per character (1-32) */
- compat_caddr_t chardata; /* font data in expanded form */
-};
-
-static inline int
-compat_fontx_ioctl(struct vc_data *vc, int cmd,
- struct compat_consolefontdesc __user *user_cfd,
- int perm, struct console_font_op *op)
-{
- struct compat_consolefontdesc cfdarg;
- int i;
-
- if (copy_from_user(&cfdarg, user_cfd, sizeof(struct compat_consolefontdesc)))
- return -EFAULT;
-
- switch (cmd) {
- case PIO_FONTX:
- if (!perm)
- return -EPERM;
- op->op = KD_FONT_OP_SET;
- op->flags = KD_FONT_FLAG_OLD;
- op->width = 8;
- op->height = cfdarg.charheight;
- op->charcount = cfdarg.charcount;
- op->data = compat_ptr(cfdarg.chardata);
- return con_font_op(vc, op);
-
- case GIO_FONTX:
- op->op = KD_FONT_OP_GET;
- op->flags = KD_FONT_FLAG_OLD;
- op->width = 8;
- op->height = cfdarg.charheight;
- op->charcount = cfdarg.charcount;
- op->data = compat_ptr(cfdarg.chardata);
- i = con_font_op(vc, op);
- if (i)
- return i;
- cfdarg.charheight = op->height;
- cfdarg.charcount = op->charcount;
- if (copy_to_user(user_cfd, &cfdarg, sizeof(struct compat_consolefontdesc)))
- return -EFAULT;
- return 0;
- }
- return -EINVAL;
-}
-
struct compat_console_font_op {
compat_uint_t op; /* operation code KD_FONT_OP_* */
compat_uint_t flags; /* KD_FONT_FLAG_* */
@@ -1222,11 +1078,6 @@ long vt_compat_ioctl(struct tty_struct *tty,
/*
* these need special handlers for incompatible data structures
*/
- case PIO_FONTX:
- case GIO_FONTX:
- ret = compat_fontx_ioctl(vc, cmd, up, perm, &op);
- break;
-
case KDFONTOP:
ret = compat_kdfontop_ioctl(up, perm, &op, vc);
break;
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-25 06:27:51 +0000