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Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/Kconfig3
-rw-r--r--drivers/tty/n_gsm.c7
-rw-r--r--drivers/tty/serial/8250/8250_core.c3
-rw-r--r--drivers/tty/serial/8250/8250_dwlib.c6
-rw-r--r--drivers/tty/serial/8250/8250_port.c4
-rw-r--r--drivers/tty/serial/fsl_lpuart.c4
-rw-r--r--drivers/tty/serial/omap-serial.c7
-rw-r--r--drivers/tty/serial/qcom_geni_serial.c7
-rw-r--r--drivers/tty/serial/serial_base.h1
-rw-r--r--drivers/tty/serial/serial_base_bus.c70
-rw-r--r--drivers/tty/serial/sh-sci.c2
-rw-r--r--drivers/tty/serial/sifive.c2
-rw-r--r--drivers/tty/serial/ucc_uart.c2
-rw-r--r--drivers/tty/sysrq.c2
-rw-r--r--drivers/tty/tty_io.c6
-rw-r--r--drivers/tty/vt/keyboard.c2
16 files changed, 84 insertions, 44 deletions
diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig
index 341abaed4ce2..069de553127c 100644
--- a/drivers/tty/Kconfig
+++ b/drivers/tty/Kconfig
@@ -164,6 +164,9 @@ config LEGACY_TIOCSTI
userspace depends on this functionality to continue operating
normally.
+ Processes which run with CAP_SYS_ADMIN, such as BRLTTY, can
+ use TIOCSTI even when this is set to N.
+
This functionality can be changed at runtime with the
dev.tty.legacy_tiocsti sysctl. This configuration option sets
the default value of the sysctl.
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index b411a26cc092..739f522cb893 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -3042,12 +3042,13 @@ static void gsm_error(struct gsm_mux *gsm)
static void gsm_cleanup_mux(struct gsm_mux *gsm, bool disc)
{
int i;
- struct gsm_dlci *dlci = gsm->dlci[0];
+ struct gsm_dlci *dlci;
struct gsm_msg *txq, *ntxq;
gsm->dead = true;
mutex_lock(&gsm->mutex);
+ dlci = gsm->dlci[0];
if (dlci) {
if (disc && dlci->state != DLCI_CLOSED) {
gsm_dlci_begin_close(dlci);
@@ -3070,8 +3071,10 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm, bool disc)
gsm->has_devices = false;
}
for (i = NUM_DLCI - 1; i >= 0; i--)
- if (gsm->dlci[i])
+ if (gsm->dlci[i]) {
gsm_dlci_release(gsm->dlci[i]);
+ gsm->dlci[i] = NULL;
+ }
mutex_unlock(&gsm->mutex);
/* Now wipe the queues */
tty_ldisc_flush(gsm->tty);
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index 914e0e6251bf..3449f8790e46 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -497,6 +497,7 @@ static struct uart_8250_port *serial8250_setup_port(int index)
up = &serial8250_ports[index];
up->port.line = index;
+ up->port.port_id = index;
serial8250_init_port(up);
if (!base_ops)
@@ -1040,6 +1041,7 @@ int serial8250_register_8250_port(const struct uart_8250_port *up)
uart_remove_one_port(&serial8250_reg, &uart->port);
uart->port.ctrl_id = up->port.ctrl_id;
+ uart->port.port_id = up->port.port_id;
uart->port.iobase = up->port.iobase;
uart->port.membase = up->port.membase;
uart->port.irq = up->port.irq;
@@ -1202,6 +1204,7 @@ void serial8250_unregister_port(int line)
uart->port.flags &= ~UPF_BOOT_AUTOCONF;
uart->port.type = PORT_UNKNOWN;
uart->port.dev = &serial8250_isa_devs->dev;
+ uart->port.port_id = line;
uart->capabilities = 0;
serial8250_init_port(uart);
serial8250_apply_quirks(uart);
diff --git a/drivers/tty/serial/8250/8250_dwlib.c b/drivers/tty/serial/8250/8250_dwlib.c
index 75f32f054ebb..84843e204a5e 100644
--- a/drivers/tty/serial/8250/8250_dwlib.c
+++ b/drivers/tty/serial/8250/8250_dwlib.c
@@ -244,7 +244,7 @@ void dw8250_setup_port(struct uart_port *p)
struct dw8250_port_data *pd = p->private_data;
struct dw8250_data *data = to_dw8250_data(pd);
struct uart_8250_port *up = up_to_u8250p(p);
- u32 reg;
+ u32 reg, old_dlf;
pd->hw_rs485_support = dw8250_detect_rs485_hw(p);
if (pd->hw_rs485_support) {
@@ -270,9 +270,11 @@ void dw8250_setup_port(struct uart_port *p)
dev_dbg(p->dev, "Designware UART version %c.%c%c\n",
(reg >> 24) & 0xff, (reg >> 16) & 0xff, (reg >> 8) & 0xff);
+ /* Preserve value written by firmware or bootloader */
+ old_dlf = dw8250_readl_ext(p, DW_UART_DLF);
dw8250_writel_ext(p, DW_UART_DLF, ~0U);
reg = dw8250_readl_ext(p, DW_UART_DLF);
- dw8250_writel_ext(p, DW_UART_DLF, 0);
+ dw8250_writel_ext(p, DW_UART_DLF, old_dlf);
if (reg) {
pd->dlf_size = fls(reg);
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 16aeb1420137..483bb552cdc4 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -703,9 +703,6 @@ static void serial8250_set_sleep(struct uart_8250_port *p, int sleep)
static void serial8250_clear_IER(struct uart_8250_port *up)
{
- /* Port locked to synchronize UART_IER access against the console. */
- lockdep_assert_held_once(&up->port.lock);
-
if (up->capabilities & UART_CAP_UUE)
serial_out(up, UART_IER, UART_IER_UUE);
else
@@ -3278,6 +3275,7 @@ void serial8250_init_port(struct uart_8250_port *up)
spin_lock_init(&port->lock);
port->ctrl_id = 0;
+ port->pm = NULL;
port->ops = &serial8250_pops;
port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 4d80fae20177..c569a08b5b19 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1139,8 +1139,8 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port *sport)
unsigned long sr = lpuart32_read(&sport->port, UARTSTAT);
if (sr & (UARTSTAT_PE | UARTSTAT_FE)) {
- /* Read DR to clear the error flags */
- lpuart32_read(&sport->port, UARTDATA);
+ /* Clear the error flags */
+ lpuart32_write(&sport->port, sr, UARTSTAT);
if (sr & UARTSTAT_PE)
sport->port.icount.parity++;
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 82d35dbbfa6c..9be63a1f1f0c 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -222,16 +222,11 @@ static inline int calculate_baud_abs_diff(struct uart_port *port,
unsigned int baud, unsigned int mode)
{
unsigned int n = port->uartclk / (mode * baud);
- int abs_diff;
if (n == 0)
n = 1;
- abs_diff = baud - (port->uartclk / (mode * n));
- if (abs_diff < 0)
- abs_diff = -abs_diff;
-
- return abs_diff;
+ return abs_diff(baud, port->uartclk / (mode * n));
}
/*
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 444c74eeab7d..daaf2a64e7f1 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -1681,13 +1681,6 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
if (ret)
return ret;
- /*
- * Set pm_runtime status as ACTIVE so that wakeup_irq gets
- * enabled/disabled from dev_pm_arm_wake_irq during system
- * suspend/resume respectively.
- */
- pm_runtime_set_active(&pdev->dev);
-
if (port->wakeup_irq > 0) {
device_init_wakeup(&pdev->dev, true);
ret = dev_pm_set_dedicated_wake_irq(&pdev->dev,
diff --git a/drivers/tty/serial/serial_base.h b/drivers/tty/serial/serial_base.h
index 9faac0ff6b89..c74c548f0db6 100644
--- a/drivers/tty/serial/serial_base.h
+++ b/drivers/tty/serial/serial_base.h
@@ -16,6 +16,7 @@ struct device;
struct serial_ctrl_device {
struct device dev;
+ struct ida port_ida;
};
struct serial_port_device {
diff --git a/drivers/tty/serial/serial_base_bus.c b/drivers/tty/serial/serial_base_bus.c
index 6ff59c89d867..3dfcf20c4eb6 100644
--- a/drivers/tty/serial/serial_base_bus.c
+++ b/drivers/tty/serial/serial_base_bus.c
@@ -10,6 +10,7 @@
#include <linux/container_of.h>
#include <linux/device.h>
+#include <linux/idr.h>
#include <linux/module.h>
#include <linux/serial_core.h>
#include <linux/slab.h>
@@ -19,11 +20,25 @@
static bool serial_base_initialized;
+static const struct device_type serial_ctrl_type = {
+ .name = "ctrl",
+};
+
+static const struct device_type serial_port_type = {
+ .name = "port",
+};
+
static int serial_base_match(struct device *dev, struct device_driver *drv)
{
- int len = strlen(drv->name);
+ if (dev->type == &serial_ctrl_type &&
+ str_has_prefix(drv->name, serial_ctrl_type.name))
+ return 1;
- return !strncmp(dev_name(dev), drv->name, len);
+ if (dev->type == &serial_port_type &&
+ str_has_prefix(drv->name, serial_port_type.name))
+ return 1;
+
+ return 0;
}
static struct bus_type serial_base_bus_type = {
@@ -48,7 +63,8 @@ static int serial_base_device_init(struct uart_port *port,
struct device *parent_dev,
const struct device_type *type,
void (*release)(struct device *dev),
- int id)
+ unsigned int ctrl_id,
+ unsigned int port_id)
{
device_initialize(dev);
dev->type = type;
@@ -61,12 +77,15 @@ static int serial_base_device_init(struct uart_port *port,
return -EPROBE_DEFER;
}
- return dev_set_name(dev, "%s.%s.%d", type->name, dev_name(port->dev), id);
-}
+ if (type == &serial_ctrl_type)
+ return dev_set_name(dev, "%s:%d", dev_name(port->dev), ctrl_id);
-static const struct device_type serial_ctrl_type = {
- .name = "ctrl",
-};
+ if (type == &serial_port_type)
+ return dev_set_name(dev, "%s:%d.%d", dev_name(port->dev),
+ ctrl_id, port_id);
+
+ return -EINVAL;
+}
static void serial_base_ctrl_release(struct device *dev)
{
@@ -81,6 +100,7 @@ void serial_base_ctrl_device_remove(struct serial_ctrl_device *ctrl_dev)
return;
device_del(&ctrl_dev->dev);
+ put_device(&ctrl_dev->dev);
}
struct serial_ctrl_device *serial_base_ctrl_add(struct uart_port *port,
@@ -93,10 +113,12 @@ struct serial_ctrl_device *serial_base_ctrl_add(struct uart_port *port,
if (!ctrl_dev)
return ERR_PTR(-ENOMEM);
+ ida_init(&ctrl_dev->port_ida);
+
err = serial_base_device_init(port, &ctrl_dev->dev,
parent, &serial_ctrl_type,
serial_base_ctrl_release,
- port->ctrl_id);
+ port->ctrl_id, 0);
if (err)
goto err_put_device;
@@ -112,10 +134,6 @@ err_put_device:
return ERR_PTR(err);
}
-static const struct device_type serial_port_type = {
- .name = "port",
-};
-
static void serial_base_port_release(struct device *dev)
{
struct serial_port_device *port_dev = to_serial_base_port_device(dev);
@@ -127,16 +145,31 @@ struct serial_port_device *serial_base_port_add(struct uart_port *port,
struct serial_ctrl_device *ctrl_dev)
{
struct serial_port_device *port_dev;
+ int min = 0, max = -1; /* Use -1 for max to apply IDA defaults */
int err;
port_dev = kzalloc(sizeof(*port_dev), GFP_KERNEL);
if (!port_dev)
return ERR_PTR(-ENOMEM);
+ /* Device driver specified port_id vs automatic assignment? */
+ if (port->port_id) {
+ min = port->port_id;
+ max = port->port_id;
+ }
+
+ err = ida_alloc_range(&ctrl_dev->port_ida, min, max, GFP_KERNEL);
+ if (err < 0) {
+ kfree(port_dev);
+ return ERR_PTR(err);
+ }
+
+ port->port_id = err;
+
err = serial_base_device_init(port, &port_dev->dev,
&ctrl_dev->dev, &serial_port_type,
serial_base_port_release,
- port->line);
+ port->ctrl_id, port->port_id);
if (err)
goto err_put_device;
@@ -150,16 +183,25 @@ struct serial_port_device *serial_base_port_add(struct uart_port *port,
err_put_device:
put_device(&port_dev->dev);
+ ida_free(&ctrl_dev->port_ida, port->port_id);
return ERR_PTR(err);
}
void serial_base_port_device_remove(struct serial_port_device *port_dev)
{
+ struct serial_ctrl_device *ctrl_dev;
+ struct device *parent;
+
if (!port_dev)
return;
+ parent = port_dev->dev.parent;
+ ctrl_dev = to_serial_base_ctrl_device(parent);
+
device_del(&port_dev->dev);
+ ida_free(&ctrl_dev->port_ida, port_dev->port->port_id);
+ put_device(&port_dev->dev);
}
static int serial_base_init(void)
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 7c9457962a3d..8b7a42e05d6d 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -590,7 +590,7 @@ static void sci_start_tx(struct uart_port *port)
dma_submit_error(s->cookie_tx)) {
if (s->cfg->regtype == SCIx_RZ_SCIFA_REGTYPE)
/* Switch irq from SCIF to DMA */
- disable_irq(s->irqs[SCIx_TXI_IRQ]);
+ disable_irq_nosync(s->irqs[SCIx_TXI_IRQ]);
s->cookie_tx = 0;
schedule_work(&s->work_tx);
diff --git a/drivers/tty/serial/sifive.c b/drivers/tty/serial/sifive.c
index 1f565a216e74..a19db49327e2 100644
--- a/drivers/tty/serial/sifive.c
+++ b/drivers/tty/serial/sifive.c
@@ -811,7 +811,7 @@ static void sifive_serial_console_write(struct console *co, const char *s,
local_irq_restore(flags);
}
-static int __init sifive_serial_console_setup(struct console *co, char *options)
+static int sifive_serial_console_setup(struct console *co, char *options)
{
struct sifive_serial_port *ssp;
int baud = SIFIVE_DEFAULT_BAUD_RATE;
diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c
index 404230c1ebb2..0a370b9ea70b 100644
--- a/drivers/tty/serial/ucc_uart.c
+++ b/drivers/tty/serial/ucc_uart.c
@@ -59,7 +59,7 @@ static int firmware_loaded;
/* #define LOOPBACK */
/* The major and minor device numbers are defined in
- * http://www.lanana.org/docs/device-list/devices-2.6+.txt. For the QE
+ * Documentation/admin-guide/devices.txt. For the QE
* UART, we have major number 204 and minor numbers 46 - 49, which are the
* same as for the CPM2. This decision was made because no Freescale part
* has both a CPM and a QE.
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index b6e70c5cfa17..e1df63a88aac 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -342,7 +342,7 @@ static const struct sysrq_key_op sysrq_ftrace_dump_op = {
static void sysrq_handle_showmem(int key)
{
- show_mem(0, NULL);
+ show_mem();
}
static const struct sysrq_key_op sysrq_showmem_op = {
.handler = sysrq_handle_showmem,
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 3959efc717aa..27d8e3a1aace 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -2285,7 +2285,7 @@ static int tiocsti(struct tty_struct *tty, char __user *p)
char ch, mbz = 0;
struct tty_ldisc *ld;
- if (!tty_legacy_tiocsti)
+ if (!tty_legacy_tiocsti && !capable(CAP_SYS_ADMIN))
return -EIO;
if ((current->signal->tty != tty) && !capable(CAP_SYS_ADMIN))
@@ -3031,7 +3031,7 @@ void __do_SAK(struct tty_struct *tty)
} while_each_pid_task(session, PIDTYPE_SID, p);
/* Now kill any processes that happen to have the tty open */
- do_each_thread(g, p) {
+ for_each_process_thread(g, p) {
if (p->signal->tty == tty) {
tty_notice(tty, "SAK: killed process %d (%s): by controlling tty\n",
task_pid_nr(p), p->comm);
@@ -3048,7 +3048,7 @@ void __do_SAK(struct tty_struct *tty)
PIDTYPE_SID);
}
task_unlock(p);
- } while_each_thread(g, p);
+ }
read_unlock(&tasklist_lock);
put_pid(session);
}
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c
index be8313cdbac3..358f216c6cd6 100644
--- a/drivers/tty/vt/keyboard.c
+++ b/drivers/tty/vt/keyboard.c
@@ -606,7 +606,7 @@ static void fn_scroll_back(struct vc_data *vc)
static void fn_show_mem(struct vc_data *vc)
{
- show_mem(0, NULL);
+ show_mem();
}
static void fn_show_state(struct vc_data *vc)
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-14 12:09:25 +0300