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-rw-r--r--drivers/tty/n_gsm.c4
-rw-r--r--drivers/tty/n_hdlc.c4
-rw-r--r--drivers/tty/n_tty.c70
-rw-r--r--drivers/tty/pty.c4
-rw-r--r--drivers/tty/serial/8250/8250_mid.c35
-rw-r--r--drivers/tty/serial/8250/8250_pci.c3
-rw-r--r--drivers/tty/serial/atmel_serial.c14
-rw-r--r--drivers/tty/serial/samsung.c4
-rw-r--r--drivers/tty/serial/ucc_uart.c3
-rw-r--r--drivers/tty/tty_buffer.c34
-rw-r--r--drivers/tty/vt/keyboard.c30
-rw-r--r--drivers/tty/vt/vt.c6
12 files changed, 101 insertions, 110 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index c3fe026d3168..9aff37186246 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -2045,7 +2045,9 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm)
}
}
spin_unlock(&gsm_mux_lock);
- WARN_ON(i == MAX_MUX);
+ /* open failed before registering => nothing to do */
+ if (i == MAX_MUX)
+ return;
/* In theory disconnecting DLCI 0 is sufficient but for some
modems this is apparently not the case. */
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index bbc4ce66c2c1..644ddb841d9f 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -600,7 +600,7 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
add_wait_queue(&tty->read_wait, &wait);
for (;;) {
- if (test_bit(TTY_OTHER_DONE, &tty->flags)) {
+ if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) {
ret = -EIO;
break;
}
@@ -828,7 +828,7 @@ static unsigned int n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,
/* set bits for operations that won't block */
if (n_hdlc->rx_buf_list.head)
mask |= POLLIN | POLLRDNORM; /* readable */
- if (test_bit(TTY_OTHER_DONE, &tty->flags))
+ if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
mask |= POLLHUP;
if (tty_hung_up_p(filp))
mask |= POLLHUP;
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index cf000b331eed..84e71bd19082 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1955,18 +1955,6 @@ static inline int input_available_p(struct tty_struct *tty, int poll)
return ldata->commit_head - ldata->read_tail >= amt;
}
-static inline int check_other_done(struct tty_struct *tty)
-{
- int done = test_bit(TTY_OTHER_DONE, &tty->flags);
- if (done) {
- /* paired with cmpxchg() in check_other_closed(); ensures
- * read buffer head index is not stale
- */
- smp_mb__after_atomic();
- }
- return done;
-}
-
/**
* copy_from_read_buf - copy read data directly
* @tty: terminal device
@@ -2171,7 +2159,7 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
struct n_tty_data *ldata = tty->disc_data;
unsigned char __user *b = buf;
DEFINE_WAIT_FUNC(wait, woken_wake_function);
- int c, done;
+ int c;
int minimum, time;
ssize_t retval = 0;
long timeout;
@@ -2239,32 +2227,35 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
((minimum - (b - buf)) >= 1))
ldata->minimum_to_wake = (minimum - (b - buf));
- done = check_other_done(tty);
-
if (!input_available_p(tty, 0)) {
- if (done) {
- retval = -EIO;
- break;
- }
- if (tty_hung_up_p(file))
- break;
- if (!timeout)
- break;
- if (file->f_flags & O_NONBLOCK) {
- retval = -EAGAIN;
- break;
- }
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
up_read(&tty->termios_rwsem);
+ tty_buffer_flush_work(tty->port);
+ down_read(&tty->termios_rwsem);
+ if (!input_available_p(tty, 0)) {
+ if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) {
+ retval = -EIO;
+ break;
+ }
+ if (tty_hung_up_p(file))
+ break;
+ if (!timeout)
+ break;
+ if (file->f_flags & O_NONBLOCK) {
+ retval = -EAGAIN;
+ break;
+ }
+ if (signal_pending(current)) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+ up_read(&tty->termios_rwsem);
- timeout = wait_woken(&wait, TASK_INTERRUPTIBLE,
- timeout);
+ timeout = wait_woken(&wait, TASK_INTERRUPTIBLE,
+ timeout);
- down_read(&tty->termios_rwsem);
- continue;
+ down_read(&tty->termios_rwsem);
+ continue;
+ }
}
if (ldata->icanon && !L_EXTPROC(tty)) {
@@ -2446,12 +2437,17 @@ static unsigned int n_tty_poll(struct tty_struct *tty, struct file *file,
poll_wait(file, &tty->read_wait, wait);
poll_wait(file, &tty->write_wait, wait);
- if (check_other_done(tty))
- mask |= POLLHUP;
if (input_available_p(tty, 1))
mask |= POLLIN | POLLRDNORM;
+ else {
+ tty_buffer_flush_work(tty->port);
+ if (input_available_p(tty, 1))
+ mask |= POLLIN | POLLRDNORM;
+ }
if (tty->packet && tty->link->ctrl_status)
mask |= POLLPRI | POLLIN | POLLRDNORM;
+ if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
+ mask |= POLLHUP;
if (tty_hung_up_p(file))
mask |= POLLHUP;
if (!(mask & (POLLHUP | POLLIN | POLLRDNORM))) {
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 78e983677339..7865228f664f 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -59,7 +59,7 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
if (!tty->link)
return;
set_bit(TTY_OTHER_CLOSED, &tty->link->flags);
- tty_flip_buffer_push(tty->link->port);
+ wake_up_interruptible(&tty->link->read_wait);
wake_up_interruptible(&tty->link->write_wait);
if (tty->driver->subtype == PTY_TYPE_MASTER) {
set_bit(TTY_OTHER_CLOSED, &tty->flags);
@@ -247,9 +247,7 @@ static int pty_open(struct tty_struct *tty, struct file *filp)
goto out;
clear_bit(TTY_IO_ERROR, &tty->flags);
- /* TTY_OTHER_CLOSED must be cleared before TTY_OTHER_DONE */
clear_bit(TTY_OTHER_CLOSED, &tty->link->flags);
- clear_bit(TTY_OTHER_DONE, &tty->link->flags);
set_bit(TTY_THROTTLED, &tty->flags);
return 0;
diff --git a/drivers/tty/serial/8250/8250_mid.c b/drivers/tty/serial/8250/8250_mid.c
index 88531a36b69c..ed489880e62b 100644
--- a/drivers/tty/serial/8250/8250_mid.c
+++ b/drivers/tty/serial/8250/8250_mid.c
@@ -14,6 +14,7 @@
#include <linux/pci.h>
#include <linux/dma/hsu.h>
+#include <linux/8250_pci.h>
#include "8250.h"
@@ -24,6 +25,7 @@
#define PCI_DEVICE_ID_INTEL_DNV_UART 0x19d8
/* Intel MID Specific registers */
+#define INTEL_MID_UART_DNV_FISR 0x08
#define INTEL_MID_UART_PS 0x30
#define INTEL_MID_UART_MUL 0x34
#define INTEL_MID_UART_DIV 0x38
@@ -31,6 +33,7 @@
struct mid8250;
struct mid8250_board {
+ unsigned int flags;
unsigned long freq;
unsigned int base_baud;
int (*setup)(struct mid8250 *, struct uart_port *p);
@@ -88,16 +91,16 @@ static int tng_setup(struct mid8250 *mid, struct uart_port *p)
static int dnv_handle_irq(struct uart_port *p)
{
struct mid8250 *mid = p->private_data;
- int ret;
-
- ret = hsu_dma_irq(&mid->dma_chip, 0);
- ret |= hsu_dma_irq(&mid->dma_chip, 1);
-
- /* For now, letting the HW generate separate interrupt for the UART */
- if (ret)
- return ret;
-
- return serial8250_handle_irq(p, serial_port_in(p, UART_IIR));
+ unsigned int fisr = serial_port_in(p, INTEL_MID_UART_DNV_FISR);
+ int ret = IRQ_NONE;
+
+ if (fisr & BIT(2))
+ ret |= hsu_dma_irq(&mid->dma_chip, 1);
+ if (fisr & BIT(1))
+ ret |= hsu_dma_irq(&mid->dma_chip, 0);
+ if (fisr & BIT(0))
+ ret |= serial8250_handle_irq(p, serial_port_in(p, UART_IIR));
+ return ret;
}
#define DNV_DMA_CHAN_OFFSET 0x80
@@ -106,12 +109,13 @@ static int dnv_setup(struct mid8250 *mid, struct uart_port *p)
{
struct hsu_dma_chip *chip = &mid->dma_chip;
struct pci_dev *pdev = to_pci_dev(p->dev);
+ unsigned int bar = FL_GET_BASE(mid->board->flags);
int ret;
chip->dev = &pdev->dev;
chip->irq = pdev->irq;
chip->regs = p->membase;
- chip->length = pci_resource_len(pdev, 0);
+ chip->length = pci_resource_len(pdev, bar);
chip->offset = DNV_DMA_CHAN_OFFSET;
/* Falling back to PIO mode if DMA probing fails */
@@ -217,6 +221,7 @@ static int mid8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct uart_8250_port uart;
struct mid8250 *mid;
+ unsigned int bar;
int ret;
ret = pcim_enable_device(pdev);
@@ -230,6 +235,7 @@ static int mid8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
return -ENOMEM;
mid->board = (struct mid8250_board *)id->driver_data;
+ bar = FL_GET_BASE(mid->board->flags);
memset(&uart, 0, sizeof(struct uart_8250_port));
@@ -242,8 +248,8 @@ static int mid8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
uart.port.flags = UPF_SHARE_IRQ | UPF_FIXED_PORT | UPF_FIXED_TYPE;
uart.port.set_termios = mid8250_set_termios;
- uart.port.mapbase = pci_resource_start(pdev, 0);
- uart.port.membase = pcim_iomap(pdev, 0, 0);
+ uart.port.mapbase = pci_resource_start(pdev, bar);
+ uart.port.membase = pcim_iomap(pdev, bar, 0);
if (!uart.port.membase)
return -ENOMEM;
@@ -282,18 +288,21 @@ static void mid8250_remove(struct pci_dev *pdev)
}
static const struct mid8250_board pnw_board = {
+ .flags = FL_BASE0,
.freq = 50000000,
.base_baud = 115200,
.setup = pnw_setup,
};
static const struct mid8250_board tng_board = {
+ .flags = FL_BASE0,
.freq = 38400000,
.base_baud = 1843200,
.setup = tng_setup,
};
static const struct mid8250_board dnv_board = {
+ .flags = FL_BASE1,
.freq = 133333333,
.base_baud = 115200,
.setup = dnv_setup,
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 7cd6f9a90542..c1d4a8fa9be8 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -1401,6 +1401,9 @@ byt_set_termios(struct uart_port *p, struct ktermios *termios,
unsigned long m, n;
u32 reg;
+ /* Gracefully handle the B0 case: fall back to B9600 */
+ fuart = fuart ? fuart : 9600 * 16;
+
/* Get Fuart closer to Fref */
fuart *= rounddown_pow_of_two(fref / fuart);
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 94294558943c..7bbadd176c74 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -277,6 +277,13 @@ static bool atmel_use_dma_rx(struct uart_port *port)
return atmel_port->use_dma_rx;
}
+static bool atmel_use_fifo(struct uart_port *port)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+
+ return atmel_port->fifo_size;
+}
+
static unsigned int atmel_get_lines_status(struct uart_port *port)
{
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
@@ -2169,7 +2176,12 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
mode |= ATMEL_US_USMODE_RS485;
} else if (termios->c_cflag & CRTSCTS) {
/* RS232 with hardware handshake (RTS/CTS) */
- mode |= ATMEL_US_USMODE_HWHS;
+ if (atmel_use_dma_rx(port) && !atmel_use_fifo(port)) {
+ dev_info(port->dev, "not enabling hardware flow control because DMA is used");
+ termios->c_cflag &= ~CRTSCTS;
+ } else {
+ mode |= ATMEL_US_USMODE_HWHS;
+ }
} else {
/* RS232 without hadware handshake */
mode |= ATMEL_US_USMODE_NORMAL;
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index fd9c47f2f29f..c8ab5370670d 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1263,6 +1263,8 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
/* check to see if we need to change clock source */
if (ourport->baudclk != clk) {
+ clk_prepare_enable(clk);
+
s3c24xx_serial_setsource(port, clk_sel);
if (!IS_ERR(ourport->baudclk)) {
@@ -1270,8 +1272,6 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
ourport->baudclk = ERR_PTR(-EINVAL);
}
- clk_prepare_enable(clk);
-
ourport->baudclk = clk;
ourport->baudclk_rate = clk ? clk_get_rate(clk) : 0;
}
diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c
index 73190f5d2832..71d26c8e1b8f 100644
--- a/drivers/tty/serial/ucc_uart.c
+++ b/drivers/tty/serial/ucc_uart.c
@@ -1478,6 +1478,9 @@ static const struct of_device_id ucc_uart_match[] = {
.type = "serial",
.compatible = "ucc_uart",
},
+ {
+ .compatible = "fsl,t1040-ucc-uart",
+ },
{},
};
MODULE_DEVICE_TABLE(of, ucc_uart_match);
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index 3cd31e0d4bd9..fb31eecb708d 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -37,29 +37,6 @@
#define TTY_BUFFER_PAGE (((PAGE_SIZE - sizeof(struct tty_buffer)) / 2) & ~0xFF)
-/*
- * If all tty flip buffers have been processed by flush_to_ldisc() or
- * dropped by tty_buffer_flush(), check if the linked pty has been closed.
- * If so, wake the reader/poll to process
- */
-static inline void check_other_closed(struct tty_struct *tty)
-{
- unsigned long flags, old;
-
- /* transition from TTY_OTHER_CLOSED => TTY_OTHER_DONE must be atomic */
- for (flags = ACCESS_ONCE(tty->flags);
- test_bit(TTY_OTHER_CLOSED, &flags);
- ) {
- old = flags;
- __set_bit(TTY_OTHER_DONE, &flags);
- flags = cmpxchg(&tty->flags, old, flags);
- if (old == flags) {
- wake_up_interruptible(&tty->read_wait);
- break;
- }
- }
-}
-
/**
* tty_buffer_lock_exclusive - gain exclusive access to buffer
* tty_buffer_unlock_exclusive - release exclusive access
@@ -254,8 +231,6 @@ void tty_buffer_flush(struct tty_struct *tty, struct tty_ldisc *ld)
if (ld && ld->ops->flush_buffer)
ld->ops->flush_buffer(tty);
- check_other_closed(tty);
-
atomic_dec(&buf->priority);
mutex_unlock(&buf->lock);
}
@@ -505,10 +480,8 @@ static void flush_to_ldisc(struct work_struct *work)
*/
count = smp_load_acquire(&head->commit) - head->read;
if (!count) {
- if (next == NULL) {
- check_other_closed(tty);
+ if (next == NULL)
break;
- }
buf->head = next;
tty_buffer_free(port, head);
continue;
@@ -597,3 +570,8 @@ bool tty_buffer_cancel_work(struct tty_port *port)
{
return cancel_work_sync(&port->buf.work);
}
+
+void tty_buffer_flush_work(struct tty_port *port)
+{
+ flush_work(&port->buf.work);
+}
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c
index 6f0336fff501..41987a55a538 100644
--- a/drivers/tty/vt/keyboard.c
+++ b/drivers/tty/vt/keyboard.c
@@ -366,34 +366,22 @@ static void to_utf8(struct vc_data *vc, uint c)
static void do_compute_shiftstate(void)
{
- unsigned int i, j, k, sym, val;
+ unsigned int k, sym, val;
shift_state = 0;
memset(shift_down, 0, sizeof(shift_down));
- for (i = 0; i < ARRAY_SIZE(key_down); i++) {
-
- if (!key_down[i])
+ for_each_set_bit(k, key_down, min(NR_KEYS, KEY_CNT)) {
+ sym = U(key_maps[0][k]);
+ if (KTYP(sym) != KT_SHIFT && KTYP(sym) != KT_SLOCK)
continue;
- k = i * BITS_PER_LONG;
-
- for (j = 0; j < BITS_PER_LONG; j++, k++) {
-
- if (!test_bit(k, key_down))
- continue;
+ val = KVAL(sym);
+ if (val == KVAL(K_CAPSSHIFT))
+ val = KVAL(K_SHIFT);
- sym = U(key_maps[0][k]);
- if (KTYP(sym) != KT_SHIFT && KTYP(sym) != KT_SLOCK)
- continue;
-
- val = KVAL(sym);
- if (val == KVAL(K_CAPSSHIFT))
- val = KVAL(K_SHIFT);
-
- shift_down[val]++;
- shift_state |= (1 << val);
- }
+ shift_down[val]++;
+ shift_state |= BIT(val);
}
}
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 4462d167900c..136ebaaa9cc0 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -750,6 +750,7 @@ static void visual_init(struct vc_data *vc, int num, int init)
vc->vc_complement_mask = 0;
vc->vc_can_do_color = 0;
vc->vc_panic_force_write = false;
+ vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
vc->vc_sw->con_init(vc, init);
if (!vc->vc_complement_mask)
vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
@@ -3583,9 +3584,10 @@ static int do_register_con_driver(const struct consw *csw, int first, int last)
goto err;
desc = csw->con_startup();
-
- if (!desc)
+ if (!desc) {
+ retval = -ENODEV;
goto err;
+ }
retval = -EINVAL;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 21:04:22 +0000