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-rw-r--r--drivers/tty/n_gsm.c68
-rw-r--r--drivers/tty/n_tty.c3
-rw-r--r--drivers/tty/serial/8250/8250_dw.c2
-rw-r--r--drivers/tty/serial/8250/8250_pci.c9
-rw-r--r--drivers/tty/serial/amba-pl011.c15
-rw-r--r--drivers/tty/serial/ifx6x60.c1
-rw-r--r--drivers/tty/serial/imx.c12
-rw-r--r--drivers/tty/serial/pch_uart.c59
-rw-r--r--drivers/tty/tty_ioctl.c4
-rw-r--r--drivers/tty/vt/keyboard.c3
-rw-r--r--drivers/tty/vt/vt.c149
11 files changed, 250 insertions, 75 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index c43b683b6eb8..4a418e44d562 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -875,7 +875,7 @@ static int gsm_dlci_data_output_framed(struct gsm_mux *gsm,
/* dlci->skb is locked by tx_lock */
if (dlci->skb == NULL) {
- dlci->skb = skb_dequeue(&dlci->skb_list);
+ dlci->skb = skb_dequeue_tail(&dlci->skb_list);
if (dlci->skb == NULL)
return 0;
first = 1;
@@ -899,8 +899,11 @@ static int gsm_dlci_data_output_framed(struct gsm_mux *gsm,
/* FIXME: need a timer or something to kick this so it can't
get stuck with no work outstanding and no buffer free */
- if (msg == NULL)
+ if (msg == NULL) {
+ skb_queue_tail(&dlci->skb_list, dlci->skb);
+ dlci->skb = NULL;
return -ENOMEM;
+ }
dp = msg->data;
if (dlci->adaption == 4) { /* Interruptible framed (Packetised Data) */
@@ -971,16 +974,19 @@ static void gsm_dlci_data_sweep(struct gsm_mux *gsm)
static void gsm_dlci_data_kick(struct gsm_dlci *dlci)
{
unsigned long flags;
+ int sweep;
spin_lock_irqsave(&dlci->gsm->tx_lock, flags);
/* If we have nothing running then we need to fire up */
+ sweep = (dlci->gsm->tx_bytes < TX_THRESH_LO);
if (dlci->gsm->tx_bytes == 0) {
if (dlci->net)
gsm_dlci_data_output_framed(dlci->gsm, dlci);
else
gsm_dlci_data_output(dlci->gsm, dlci);
- } else if (dlci->gsm->tx_bytes < TX_THRESH_LO)
- gsm_dlci_data_sweep(dlci->gsm);
+ }
+ if (sweep)
+ gsm_dlci_data_sweep(dlci->gsm);
spin_unlock_irqrestore(&dlci->gsm->tx_lock, flags);
}
@@ -1190,6 +1196,8 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command,
u8 *data, int clen)
{
u8 buf[1];
+ unsigned long flags;
+
switch (command) {
case CMD_CLD: {
struct gsm_dlci *dlci = gsm->dlci[0];
@@ -1215,7 +1223,9 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command,
gsm->constipated = 0;
gsm_control_reply(gsm, CMD_FCOFF, NULL, 0);
/* Kick the link in case it is idling */
+ spin_lock_irqsave(&gsm->tx_lock, flags);
gsm_data_kick(gsm);
+ spin_unlock_irqrestore(&gsm->tx_lock, flags);
break;
case CMD_MSC:
/* Out of band modem line change indicator for a DLCI */
@@ -1682,6 +1692,8 @@ static inline void dlci_put(struct gsm_dlci *dlci)
kref_put(&dlci->ref, gsm_dlci_free);
}
+static void gsm_destroy_network(struct gsm_dlci *dlci);
+
/**
* gsm_dlci_release - release DLCI
* @dlci: DLCI to destroy
@@ -1695,9 +1707,19 @@ static void gsm_dlci_release(struct gsm_dlci *dlci)
{
struct tty_struct *tty = tty_port_tty_get(&dlci->port);
if (tty) {
+ mutex_lock(&dlci->mutex);
+ gsm_destroy_network(dlci);
+ mutex_unlock(&dlci->mutex);
+
+ /* tty_vhangup needs the tty_lock, so unlock and
+ relock after doing the hangup. */
+ tty_unlock();
tty_vhangup(tty);
+ tty_lock();
+ tty_port_tty_set(&dlci->port, NULL);
tty_kref_put(tty);
}
+ dlci->state = DLCI_CLOSED;
dlci_put(dlci);
}
@@ -2377,12 +2399,12 @@ static void gsmld_write_wakeup(struct tty_struct *tty)
/* Queue poll */
clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
+ spin_lock_irqsave(&gsm->tx_lock, flags);
gsm_data_kick(gsm);
if (gsm->tx_bytes < TX_THRESH_LO) {
- spin_lock_irqsave(&gsm->tx_lock, flags);
gsm_dlci_data_sweep(gsm);
- spin_unlock_irqrestore(&gsm->tx_lock, flags);
}
+ spin_unlock_irqrestore(&gsm->tx_lock, flags);
}
/**
@@ -2889,6 +2911,10 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp)
gsm = gsm_mux[mux];
if (gsm->dead)
return -EL2HLT;
+ /* If DLCI 0 is not yet fully open return an error. This is ok from a locking
+ perspective as we don't have to worry about this if DLCI0 is lost */
+ if (gsm->dlci[0] && gsm->dlci[0]->state != DLCI_OPEN)
+ return -EL2NSYNC;
dlci = gsm->dlci[line];
if (dlci == NULL)
dlci = gsm_dlci_alloc(gsm, line);
@@ -2919,6 +2945,8 @@ static void gsmtty_close(struct tty_struct *tty, struct file *filp)
if (dlci == NULL)
return;
+ if (dlci->state == DLCI_CLOSED)
+ return;
mutex_lock(&dlci->mutex);
gsm_destroy_network(dlci);
mutex_unlock(&dlci->mutex);
@@ -2937,6 +2965,8 @@ out:
static void gsmtty_hangup(struct tty_struct *tty)
{
struct gsm_dlci *dlci = tty->driver_data;
+ if (dlci->state == DLCI_CLOSED)
+ return;
tty_port_hangup(&dlci->port);
gsm_dlci_begin_close(dlci);
}
@@ -2944,9 +2974,12 @@ static void gsmtty_hangup(struct tty_struct *tty)
static int gsmtty_write(struct tty_struct *tty, const unsigned char *buf,
int len)
{
+ int sent;
struct gsm_dlci *dlci = tty->driver_data;
+ if (dlci->state == DLCI_CLOSED)
+ return -EINVAL;
/* Stuff the bytes into the fifo queue */
- int sent = kfifo_in_locked(dlci->fifo, buf, len, &dlci->lock);
+ sent = kfifo_in_locked(dlci->fifo, buf, len, &dlci->lock);
/* Need to kick the channel */
gsm_dlci_data_kick(dlci);
return sent;
@@ -2955,18 +2988,24 @@ static int gsmtty_write(struct tty_struct *tty, const unsigned char *buf,
static int gsmtty_write_room(struct tty_struct *tty)
{
struct gsm_dlci *dlci = tty->driver_data;
+ if (dlci->state == DLCI_CLOSED)
+ return -EINVAL;
return TX_SIZE - kfifo_len(dlci->fifo);
}
static int gsmtty_chars_in_buffer(struct tty_struct *tty)
{
struct gsm_dlci *dlci = tty->driver_data;
+ if (dlci->state == DLCI_CLOSED)
+ return -EINVAL;
return kfifo_len(dlci->fifo);
}
static void gsmtty_flush_buffer(struct tty_struct *tty)
{
struct gsm_dlci *dlci = tty->driver_data;
+ if (dlci->state == DLCI_CLOSED)
+ return;
/* Caution needed: If we implement reliable transport classes
then the data being transmitted can't simply be junked once
it has first hit the stack. Until then we can just blow it
@@ -2985,6 +3024,8 @@ static void gsmtty_wait_until_sent(struct tty_struct *tty, int timeout)
static int gsmtty_tiocmget(struct tty_struct *tty)
{
struct gsm_dlci *dlci = tty->driver_data;
+ if (dlci->state == DLCI_CLOSED)
+ return -EINVAL;
return dlci->modem_rx;
}
@@ -2994,6 +3035,8 @@ static int gsmtty_tiocmset(struct tty_struct *tty,
struct gsm_dlci *dlci = tty->driver_data;
unsigned int modem_tx = dlci->modem_tx;
+ if (dlci->state == DLCI_CLOSED)
+ return -EINVAL;
modem_tx &= ~clear;
modem_tx |= set;
@@ -3012,6 +3055,8 @@ static int gsmtty_ioctl(struct tty_struct *tty,
struct gsm_netconfig nc;
int index;
+ if (dlci->state == DLCI_CLOSED)
+ return -EINVAL;
switch (cmd) {
case GSMIOC_ENABLE_NET:
if (copy_from_user(&nc, (void __user *)arg, sizeof(nc)))
@@ -3038,6 +3083,9 @@ static int gsmtty_ioctl(struct tty_struct *tty,
static void gsmtty_set_termios(struct tty_struct *tty, struct ktermios *old)
{
+ struct gsm_dlci *dlci = tty->driver_data;
+ if (dlci->state == DLCI_CLOSED)
+ return;
/* For the moment its fixed. In actual fact the speed information
for the virtual channel can be propogated in both directions by
the RPN control message. This however rapidly gets nasty as we
@@ -3049,6 +3097,8 @@ static void gsmtty_set_termios(struct tty_struct *tty, struct ktermios *old)
static void gsmtty_throttle(struct tty_struct *tty)
{
struct gsm_dlci *dlci = tty->driver_data;
+ if (dlci->state == DLCI_CLOSED)
+ return;
if (tty->termios->c_cflag & CRTSCTS)
dlci->modem_tx &= ~TIOCM_DTR;
dlci->throttled = 1;
@@ -3059,6 +3109,8 @@ static void gsmtty_throttle(struct tty_struct *tty)
static void gsmtty_unthrottle(struct tty_struct *tty)
{
struct gsm_dlci *dlci = tty->driver_data;
+ if (dlci->state == DLCI_CLOSED)
+ return;
if (tty->termios->c_cflag & CRTSCTS)
dlci->modem_tx |= TIOCM_DTR;
dlci->throttled = 0;
@@ -3070,6 +3122,8 @@ static int gsmtty_break_ctl(struct tty_struct *tty, int state)
{
struct gsm_dlci *dlci = tty->driver_data;
int encode = 0; /* Off */
+ if (dlci->state == DLCI_CLOSED)
+ return -EINVAL;
if (state == -1) /* "On indefinitely" - we can't encode this
properly */
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 94b6eda87afd..2303a02e9dc5 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1727,7 +1727,8 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
do_it_again:
- BUG_ON(!tty->read_buf);
+ if (WARN_ON(!tty->read_buf))
+ return -EAGAIN;
c = job_control(tty, file);
if (c < 0)
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index f574eef3075f..b6dc908a24c6 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -79,7 +79,7 @@ static int dw8250_handle_irq(struct uart_port *p)
} else if ((iir & UART_IIR_BUSY) == UART_IIR_BUSY) {
/* Clear the USR and write the LCR again. */
(void)p->serial_in(p, UART_USR);
- p->serial_out(p, d->last_lcr, UART_LCR);
+ p->serial_out(p, UART_LCR, d->last_lcr);
return 1;
}
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 3614973c9990..40747feed34c 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -1125,6 +1125,8 @@ pci_xr17c154_setup(struct serial_private *priv,
#define PCI_SUBDEVICE_ID_OCTPRO422 0x0208
#define PCI_SUBDEVICE_ID_POCTAL232 0x0308
#define PCI_SUBDEVICE_ID_POCTAL422 0x0408
+#define PCI_SUBDEVICE_ID_SIIG_DUAL_00 0x2500
+#define PCI_SUBDEVICE_ID_SIIG_DUAL_30 0x2530
#define PCI_VENDOR_ID_ADVANTECH 0x13fe
#define PCI_DEVICE_ID_INTEL_CE4100_UART 0x2e66
#define PCI_DEVICE_ID_ADVANTECH_PCI3620 0x3620
@@ -3187,8 +3189,11 @@ static struct pci_device_id serial_pci_tbl[] = {
* For now just used the hex ID 0x950a.
*/
{ PCI_VENDOR_ID_OXSEMI, 0x950a,
- PCI_SUBVENDOR_ID_SIIG, PCI_SUBDEVICE_ID_SIIG_DUAL_SERIAL, 0, 0,
- pbn_b0_2_115200 },
+ PCI_SUBVENDOR_ID_SIIG, PCI_SUBDEVICE_ID_SIIG_DUAL_00,
+ 0, 0, pbn_b0_2_115200 },
+ { PCI_VENDOR_ID_OXSEMI, 0x950a,
+ PCI_SUBVENDOR_ID_SIIG, PCI_SUBDEVICE_ID_SIIG_DUAL_30,
+ 0, 0, pbn_b0_2_115200 },
{ PCI_VENDOR_ID_OXSEMI, 0x950a,
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b0_2_1130000 },
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 3d569cd68f58..b69356c227c4 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1654,13 +1654,26 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios,
old_cr &= ~ST_UART011_CR_OVSFACT;
}
+ /*
+ * Workaround for the ST Micro oversampling variants to
+ * increase the bitrate slightly, by lowering the divisor,
+ * to avoid delayed sampling of start bit at high speeds,
+ * else we see data corruption.
+ */
+ if (uap->vendor->oversampling) {
+ if ((baud >= 3000000) && (baud < 3250000) && (quot > 1))
+ quot -= 1;
+ else if ((baud > 3250000) && (quot > 2))
+ quot -= 2;
+ }
/* Set baud rate */
writew(quot & 0x3f, port->membase + UART011_FBRD);
writew(quot >> 6, port->membase + UART011_IBRD);
/*
* ----------v----------v----------v----------v-----
- * NOTE: MUST BE WRITTEN AFTER UARTLCR_M & UARTLCR_L
+ * NOTE: lcrh_tx and lcrh_rx MUST BE WRITTEN AFTER
+ * UART011_FBRD & UART011_IBRD.
* ----------^----------^----------^----------^-----
*/
writew(lcr_h, port->membase + uap->lcrh_rx);
diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c
index 144cd3987d4c..17f587c5dbab 100644
--- a/drivers/tty/serial/ifx6x60.c
+++ b/drivers/tty/serial/ifx6x60.c
@@ -552,6 +552,7 @@ static void ifx_port_shutdown(struct tty_port *port)
container_of(port, struct ifx_spi_device, tty_port);
mrdy_set_low(ifx_dev);
+ del_timer(&ifx_dev->spi_timer);
clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags);
tasklet_kill(&ifx_dev->io_work_tasklet);
}
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index e7feceeebc2f..0de7ed788631 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -756,6 +756,7 @@ static int imx_startup(struct uart_port *port)
}
}
+ spin_lock_irqsave(&sport->port.lock, flags);
/*
* Finally, clear and enable interrupts
*/
@@ -809,7 +810,6 @@ static int imx_startup(struct uart_port *port)
/*
* Enable modem status interrupts
*/
- spin_lock_irqsave(&sport->port.lock,flags);
imx_enable_ms(&sport->port);
spin_unlock_irqrestore(&sport->port.lock,flags);
@@ -839,10 +839,13 @@ static void imx_shutdown(struct uart_port *port)
{
struct imx_port *sport = (struct imx_port *)port;
unsigned long temp;
+ unsigned long flags;
+ spin_lock_irqsave(&sport->port.lock, flags);
temp = readl(sport->port.membase + UCR2);
temp &= ~(UCR2_TXEN);
writel(temp, sport->port.membase + UCR2);
+ spin_unlock_irqrestore(&sport->port.lock, flags);
if (USE_IRDA(sport)) {
struct imxuart_platform_data *pdata;
@@ -871,12 +874,14 @@ static void imx_shutdown(struct uart_port *port)
* Disable all interrupts, port and break condition.
*/
+ spin_lock_irqsave(&sport->port.lock, flags);
temp = readl(sport->port.membase + UCR1);
temp &= ~(UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN | UCR1_UARTEN);
if (USE_IRDA(sport))
temp &= ~(UCR1_IREN);
writel(temp, sport->port.membase + UCR1);
+ spin_unlock_irqrestore(&sport->port.lock, flags);
}
static void
@@ -1219,6 +1224,9 @@ imx_console_write(struct console *co, const char *s, unsigned int count)
struct imx_port *sport = imx_ports[co->index];
struct imx_port_ucrs old_ucr;
unsigned int ucr1;
+ unsigned long flags;
+
+ spin_lock_irqsave(&sport->port.lock, flags);
/*
* First, save UCR1/2/3 and then disable interrupts
@@ -1244,6 +1252,8 @@ imx_console_write(struct console *co, const char *s, unsigned int count)
while (!(readl(sport->port.membase + USR2) & USR2_TXDC));
imx_port_ucrs_restore(&sport->port, &old_ucr);
+
+ spin_unlock_irqrestore(&sport->port.lock, flags);
}
/*
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index c2816f494807..7d4751474da1 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -252,6 +252,9 @@ struct eg20t_port {
dma_addr_t rx_buf_dma;
struct dentry *debugfs;
+
+ /* protect the eg20t_port private structure and io access to membase */
+ spinlock_t lock;
};
/**
@@ -754,7 +757,8 @@ static void pch_dma_rx_complete(void *arg)
tty_flip_buffer_push(tty);
tty_kref_put(tty);
async_tx_ack(priv->desc_rx);
- pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT);
+ pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT |
+ PCH_UART_HAL_RX_ERR_INT);
}
static void pch_dma_tx_complete(void *arg)
@@ -809,7 +813,8 @@ static int handle_rx_to(struct eg20t_port *priv)
int rx_size;
int ret;
if (!priv->start_rx) {
- pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT);
+ pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT |
+ PCH_UART_HAL_RX_ERR_INT);
return 0;
}
buf = &priv->rxbuf;
@@ -1056,7 +1061,7 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id)
unsigned int iid;
unsigned long flags;
- spin_lock_irqsave(&priv->port.lock, flags);
+ spin_lock_irqsave(&priv->lock, flags);
handled = 0;
while ((iid = pch_uart_hal_get_iid(priv)) > 1) {
switch (iid) {
@@ -1071,11 +1076,13 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id)
case PCH_UART_IID_RDR: /* Received Data Ready */
if (priv->use_dma) {
pch_uart_hal_disable_interrupt(priv,
- PCH_UART_HAL_RX_INT);
+ PCH_UART_HAL_RX_INT |
+ PCH_UART_HAL_RX_ERR_INT);
ret = dma_handle_rx(priv);
if (!ret)
pch_uart_hal_enable_interrupt(priv,
- PCH_UART_HAL_RX_INT);
+ PCH_UART_HAL_RX_INT |
+ PCH_UART_HAL_RX_ERR_INT);
} else {
ret = handle_rx(priv);
}
@@ -1107,7 +1114,7 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id)
priv->int_dis_flag = 0;
}
- spin_unlock_irqrestore(&priv->port.lock, flags);
+ spin_unlock_irqrestore(&priv->lock, flags);
return IRQ_RETVAL(handled);
}
@@ -1199,7 +1206,8 @@ static void pch_uart_stop_rx(struct uart_port *port)
struct eg20t_port *priv;
priv = container_of(port, struct eg20t_port, port);
priv->start_rx = 0;
- pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT);
+ pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT |
+ PCH_UART_HAL_RX_ERR_INT);
priv->int_dis_flag = 1;
}
@@ -1218,9 +1226,9 @@ static void pch_uart_break_ctl(struct uart_port *port, int ctl)
unsigned long flags;
priv = container_of(port, struct eg20t_port, port);
- spin_lock_irqsave(&port->lock, flags);
+ spin_lock_irqsave(&priv->lock, flags);
pch_uart_hal_set_break(priv, ctl);
- spin_unlock_irqrestore(&port->lock, flags);
+ spin_unlock_irqrestore(&priv->lock, flags);
}
/* Grab any interrupt resources and initialise any low level driver state. */
@@ -1255,6 +1263,7 @@ static int pch_uart_startup(struct uart_port *port)
break;
case 16:
fifo_size = PCH_UART_HAL_FIFO16;
+ break;
case 1:
default:
fifo_size = PCH_UART_HAL_FIFO_DIS;
@@ -1292,7 +1301,8 @@ static int pch_uart_startup(struct uart_port *port)
pch_request_dma(port);
priv->start_rx = 1;
- pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT);
+ pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT |
+ PCH_UART_HAL_RX_ERR_INT);
uart_update_timeout(port, CS8, default_baud);
return 0;
@@ -1350,7 +1360,7 @@ static void pch_uart_set_termios(struct uart_port *port,
stb = PCH_UART_HAL_STB1;
if (termios->c_cflag & PARENB) {
- if (!(termios->c_cflag & PARODD))
+ if (termios->c_cflag & PARODD)
parity = PCH_UART_HAL_PARITY_ODD;
else
parity = PCH_UART_HAL_PARITY_EVEN;
@@ -1368,7 +1378,8 @@ static void pch_uart_set_termios(struct uart_port *port,
baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);
- spin_lock_irqsave(&port->lock, flags);
+ spin_lock_irqsave(&priv->lock, flags);
+ spin_lock(&port->lock);
uart_update_timeout(port, termios->c_cflag, baud);
rtn = pch_uart_hal_set_line(priv, baud, parity, bits, stb);
@@ -1381,7 +1392,8 @@ static void pch_uart_set_termios(struct uart_port *port,
tty_termios_encode_baud_rate(termios, baud, baud);
out:
- spin_unlock_irqrestore(&port->lock, flags);
+ spin_unlock(&port->lock);
+ spin_unlock_irqrestore(&priv->lock, flags);
}
static const char *pch_uart_type(struct uart_port *port)
@@ -1531,8 +1543,9 @@ pch_console_write(struct console *co, const char *s, unsigned int count)
{
struct eg20t_port *priv;
unsigned long flags;
+ int priv_locked = 1;
+ int port_locked = 1;
u8 ier;
- int locked = 1;
priv = pch_uart_ports[co->index];
@@ -1540,12 +1553,16 @@ pch_console_write(struct console *co, const char *s, unsigned int count)
local_irq_save(flags);
if (priv->port.sysrq) {
- /* serial8250_handle_port() already took the lock */
- locked = 0;
+ spin_lock(&priv->lock);
+ /* serial8250_handle_port() already took the port lock */
+ port_locked = 0;
} else if (oops_in_progress) {
- locked = spin_trylock(&priv->port.lock);
- } else
+ priv_locked = spin_trylock(&priv->lock);
+ port_locked = spin_trylock(&priv->port.lock);
+ } else {
+ spin_lock(&priv->lock);
spin_lock(&priv->port.lock);
+ }
/*
* First save the IER then disable the interrupts
@@ -1563,8 +1580,10 @@ pch_console_write(struct console *co, const char *s, unsigned int count)
wait_for_xmitr(priv, BOTH_EMPTY);
iowrite8(ier, priv->membase + UART_IER);
- if (locked)
+ if (port_locked)
spin_unlock(&priv->port.lock);
+ if (priv_locked)
+ spin_unlock(&priv->lock);
local_irq_restore(flags);
}
@@ -1662,6 +1681,8 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
pci_enable_msi(pdev);
pci_set_master(pdev);
+ spin_lock_init(&priv->lock);
+
iobase = pci_resource_start(pdev, 0);
mapbase = pci_resource_start(pdev, 1);
priv->mapbase = mapbase;
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index a1b9a2f68567..f8d03da536dd 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -617,7 +617,7 @@ static int set_termios(struct tty_struct *tty, void __user *arg, int opt)
if (opt & TERMIOS_WAIT) {
tty_wait_until_sent(tty, 0);
if (signal_pending(current))
- return -EINTR;
+ return -ERESTARTSYS;
}
tty_set_termios(tty, &tmp_termios);
@@ -684,7 +684,7 @@ static int set_termiox(struct tty_struct *tty, void __user *arg, int opt)
if (opt & TERMIOS_WAIT) {
tty_wait_until_sent(tty, 0);
if (signal_pending(current))
- return -EINTR;
+ return -ERESTARTSYS;
}
mutex_lock(&tty->termios_mutex);
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c
index 3b0c4e32ed7b..a6d5d51fcbc5 100644
--- a/drivers/tty/vt/keyboard.c
+++ b/drivers/tty/vt/keyboard.c
@@ -1053,13 +1053,10 @@ static int kbd_update_leds_helper(struct input_handle *handle, void *data)
*/
int vt_get_leds(int console, int flag)
{
- unsigned long flags;
struct kbd_struct * kbd = kbd_table + console;
int ret;
- spin_lock_irqsave(&kbd_event_lock, flags);
ret = vc_kbd_led(kbd, flag);
- spin_unlock_irqrestore(&kbd_event_lock, flags);
return ret;
}
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 2156188db4a6..268294c71c11 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -656,7 +656,7 @@ static inline void save_screen(struct vc_data *vc)
* Redrawing of screen
*/
-static void clear_buffer_attributes(struct vc_data *vc)
+void clear_buffer_attributes(struct vc_data *vc)
{
unsigned short *p = (unsigned short *)vc->vc_origin;
int count = vc->vc_screenbuf_size / 2;
@@ -3017,7 +3017,7 @@ int __init vty_init(const struct file_operations *console_fops)
static struct class *vtconsole_class;
-static int bind_con_driver(const struct consw *csw, int first, int last,
+static int do_bind_con_driver(const struct consw *csw, int first, int last,
int deflt)
{
struct module *owner = csw->owner;
@@ -3028,7 +3028,7 @@ static int bind_con_driver(const struct consw *csw, int first, int last,
if (!try_module_get(owner))
return -ENODEV;
- console_lock();
+ WARN_CONSOLE_UNLOCKED();
/* check if driver is registered */
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
@@ -3113,11 +3113,22 @@ static int bind_con_driver(const struct consw *csw, int first, int last,
retval = 0;
err:
- console_unlock();
module_put(owner);
return retval;
};
+
+static int bind_con_driver(const struct consw *csw, int first, int last,
+ int deflt)
+{
+ int ret;
+
+ console_lock();
+ ret = do_bind_con_driver(csw, first, last, deflt);
+ console_unlock();
+ return ret;
+}
+
#ifdef CONFIG_VT_HW_CONSOLE_BINDING
static int con_is_graphics(const struct consw *csw, int first, int last)
{
@@ -3154,6 +3165,18 @@ static int con_is_graphics(const struct consw *csw, int first, int last)
*/
int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
{
+ int retval;
+
+ console_lock();
+ retval = do_unbind_con_driver(csw, first, last, deflt);
+ console_unlock();
+ return retval;
+}
+EXPORT_SYMBOL(unbind_con_driver);
+
+/* unlocked version of unbind_con_driver() */
+int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
+{
struct module *owner = csw->owner;
const struct consw *defcsw = NULL;
struct con_driver *con_driver = NULL, *con_back = NULL;
@@ -3162,7 +3185,7 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
if (!try_module_get(owner))
return -ENODEV;
- console_lock();
+ WARN_CONSOLE_UNLOCKED();
/* check if driver is registered and if it is unbindable */
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
@@ -3175,10 +3198,8 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
}
}
- if (retval) {
- console_unlock();
+ if (retval)
goto err;
- }
retval = -ENODEV;
@@ -3194,15 +3215,11 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
}
}
- if (retval) {
- console_unlock();
+ if (retval)
goto err;
- }
- if (!con_is_bound(csw)) {
- console_unlock();
+ if (!con_is_bound(csw))
goto err;
- }
first = max(first, con_driver->first);
last = min(last, con_driver->last);
@@ -3229,15 +3246,14 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
if (!con_is_bound(csw))
con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
- console_unlock();
/* ignore return value, binding should not fail */
- bind_con_driver(defcsw, first, last, deflt);
+ do_bind_con_driver(defcsw, first, last, deflt);
err:
module_put(owner);
return retval;
}
-EXPORT_SYMBOL(unbind_con_driver);
+EXPORT_SYMBOL_GPL(do_unbind_con_driver);
static int vt_bind(struct con_driver *con)
{
@@ -3475,6 +3491,19 @@ int con_debug_enter(struct vc_data *vc)
kdb_set(2, setargs);
}
}
+ if (vc->vc_cols < 999) {
+ int colcount;
+ char cols[4];
+ const char *setargs[3] = {
+ "set",
+ "COLUMNS",
+ cols,
+ };
+ if (kdbgetintenv(setargs[0], &colcount)) {
+ snprintf(cols, 4, "%i", vc->vc_cols);
+ kdb_set(2, setargs);
+ }
+ }
#endif /* CONFIG_KGDB_KDB */
return ret;
}
@@ -3509,28 +3538,18 @@ int con_debug_leave(void)
}
EXPORT_SYMBOL_GPL(con_debug_leave);
-/**
- * register_con_driver - register console driver to console layer
- * @csw: console driver
- * @first: the first console to take over, minimum value is 0
- * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
- *
- * DESCRIPTION: This function registers a console driver which can later
- * bind to a range of consoles specified by @first and @last. It will
- * also initialize the console driver by calling con_startup().
- */
-int register_con_driver(const struct consw *csw, int first, int last)
+static int do_register_con_driver(const struct consw *csw, int first, int last)
{
struct module *owner = csw->owner;
struct con_driver *con_driver;
const char *desc;
int i, retval = 0;
+ WARN_CONSOLE_UNLOCKED();
+
if (!try_module_get(owner))
return -ENODEV;
- console_lock();
-
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
con_driver = &registered_con_driver[i];
@@ -3583,10 +3602,29 @@ int register_con_driver(const struct consw *csw, int first, int last)
}
err:
- console_unlock();
module_put(owner);
return retval;
}
+
+/**
+ * register_con_driver - register console driver to console layer
+ * @csw: console driver
+ * @first: the first console to take over, minimum value is 0
+ * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
+ *
+ * DESCRIPTION: This function registers a console driver which can later
+ * bind to a range of consoles specified by @first and @last. It will
+ * also initialize the console driver by calling con_startup().
+ */
+int register_con_driver(const struct consw *csw, int first, int last)
+{
+ int retval;
+
+ console_lock();
+ retval = do_register_con_driver(csw, first, last);
+ console_unlock();
+ return retval;
+}
EXPORT_SYMBOL(register_con_driver);
/**
@@ -3602,9 +3640,18 @@ EXPORT_SYMBOL(register_con_driver);
*/
int unregister_con_driver(const struct consw *csw)
{
- int i, retval = -ENODEV;
+ int retval;
console_lock();
+ retval = do_unregister_con_driver(csw);
+ console_unlock();
+ return retval;
+}
+EXPORT_SYMBOL(unregister_con_driver);
+
+int do_unregister_con_driver(const struct consw *csw)
+{
+ int i, retval = -ENODEV;
/* cannot unregister a bound driver */
if (con_is_bound(csw))
@@ -3630,27 +3677,53 @@ int unregister_con_driver(const struct consw *csw)
}
}
err:
- console_unlock();
return retval;
}
-EXPORT_SYMBOL(unregister_con_driver);
+EXPORT_SYMBOL_GPL(do_unregister_con_driver);
+
+/*
+ * If we support more console drivers, this function is used
+ * when a driver wants to take over some existing consoles
+ * and become default driver for newly opened ones.
+ *
+ * take_over_console is basically a register followed by unbind
+ */
+int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
+{
+ int err;
+
+ err = do_register_con_driver(csw, first, last);
+ /*
+ * If we get an busy error we still want to bind the console driver
+ * and return success, as we may have unbound the console driver
+ * but not unregistered it.
+ */
+ if (err == -EBUSY)
+ err = 0;
+ if (!err)
+ do_bind_con_driver(csw, first, last, deflt);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(do_take_over_console);
/*
* If we support more console drivers, this function is used
* when a driver wants to take over some existing consoles
* and become default driver for newly opened ones.
*
- * take_over_console is basically a register followed by unbind
+ * take_over_console is basically a register followed by unbind
*/
int take_over_console(const struct consw *csw, int first, int last, int deflt)
{
int err;
err = register_con_driver(csw, first, last);
- /* if we get an busy error we still want to bind the console driver
+ /*
+ * If we get an busy error we still want to bind the console driver
* and return success, as we may have unbound the console driver
-  * but not unregistered it.
- */
+ * but not unregistered it.
+ */
if (err == -EBUSY)
err = 0;
if (!err)
generated by cgit v1.2.3 (git 2.0.4) at 2024-09-14 16:37:27 +0000