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-rw-r--r--drivers/tty/pty.c14
-rw-r--r--drivers/tty/serial/8250/8250_core.c4
-rw-r--r--drivers/tty/serial/8250/8250_dma.c6
-rw-r--r--drivers/tty/serial/8250/8250_dw.c26
-rw-r--r--drivers/tty/serial/8250/8250_port.c6
-rw-r--r--drivers/tty/serial/Kconfig4
-rw-r--r--drivers/tty/serial/amba-pl011.c23
-rw-r--r--drivers/tty/serial/mpc52xx_uart.c4
-rw-r--r--drivers/tty/serial/mvebu-uart.c25
-rw-r--r--drivers/tty/serial/qcom_geni_serial.c3
-rw-r--r--drivers/tty/serial/samsung_tty.c5
-rw-r--r--drivers/tty/serial/serial_core.c5
-rw-r--r--drivers/tty/serial/stm32-usart.c2
-rw-r--r--drivers/tty/sysrq.c2
-rw-r--r--drivers/tty/tty.h3
-rw-r--r--drivers/tty/tty_buffer.c46
-rw-r--r--drivers/tty/vt/vt.c2
17 files changed, 116 insertions, 64 deletions
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 74bfabe5b453..752dab3356d7 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->flow.stopped)
+ if (tty->flow.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_core.c b/drivers/tty/serial/8250/8250_core.c
index 57e86133af4f..2e83e7367441 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -23,6 +23,7 @@
#include <linux/sysrq.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/tty.h>
#include <linux/ratelimit.h>
#include <linux/tty_flip.h>
@@ -558,6 +559,9 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev)
up->port.dev = dev;
+ if (uart_console_enabled(&up->port))
+ pm_runtime_get_sync(up->port.dev);
+
serial8250_apply_quirks(up);
uart_add_one_port(drv, &up->port);
}
diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c
index 7133fceed35e..a8dba4a0a8fb 100644
--- a/drivers/tty/serial/8250/8250_dma.c
+++ b/drivers/tty/serial/8250/8250_dma.c
@@ -106,10 +106,10 @@ int serial8250_tx_dma(struct uart_8250_port *p)
UART_XMIT_SIZE, DMA_TO_DEVICE);
dma_async_issue_pending(dma->txchan);
- if (dma->tx_err) {
+ serial8250_clear_THRI(p);
+ if (dma->tx_err)
dma->tx_err = 0;
- serial8250_clear_THRI(p);
- }
+
return 0;
err:
dma->tx_err = 1;
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index f9e85ed0c50b..a604b42e4458 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -48,7 +48,7 @@
#define RZN1_UART_xDMACR_DMA_EN BIT(0)
#define RZN1_UART_xDMACR_1_WORD_BURST (0 << 1)
#define RZN1_UART_xDMACR_4_WORD_BURST (1 << 1)
-#define RZN1_UART_xDMACR_8_WORD_BURST (3 << 1)
+#define RZN1_UART_xDMACR_8_WORD_BURST (2 << 1)
#define RZN1_UART_xDMACR_BLK_SZ(x) ((x) << 3)
/* Quirks */
@@ -783,18 +783,18 @@ static const struct of_device_id dw8250_of_match[] = {
MODULE_DEVICE_TABLE(of, dw8250_of_match);
static const struct acpi_device_id dw8250_acpi_match[] = {
- { "INT33C4", 0 },
- { "INT33C5", 0 },
- { "INT3434", 0 },
- { "INT3435", 0 },
- { "80860F0A", 0 },
- { "8086228A", 0 },
- { "APMC0D08", 0},
- { "AMD0020", 0 },
- { "AMDI0020", 0 },
- { "AMDI0022", 0 },
- { "BRCM2032", 0 },
- { "HISI0031", 0 },
+ { "80860F0A", (kernel_ulong_t)&dw8250_dw_apb },
+ { "8086228A", (kernel_ulong_t)&dw8250_dw_apb },
+ { "AMD0020", (kernel_ulong_t)&dw8250_dw_apb },
+ { "AMDI0020", (kernel_ulong_t)&dw8250_dw_apb },
+ { "AMDI0022", (kernel_ulong_t)&dw8250_dw_apb },
+ { "APMC0D08", (kernel_ulong_t)&dw8250_dw_apb},
+ { "BRCM2032", (kernel_ulong_t)&dw8250_dw_apb },
+ { "HISI0031", (kernel_ulong_t)&dw8250_dw_apb },
+ { "INT33C4", (kernel_ulong_t)&dw8250_dw_apb },
+ { "INT33C5", (kernel_ulong_t)&dw8250_dw_apb },
+ { "INT3434", (kernel_ulong_t)&dw8250_dw_apb },
+ { "INT3435", (kernel_ulong_t)&dw8250_dw_apb },
{ },
};
MODULE_DEVICE_TABLE(acpi, dw8250_acpi_match);
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 72252d956f17..39b35a61958c 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -1936,7 +1936,7 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
if ((status & UART_LSR_THRE) && (up->ier & UART_IER_THRI)) {
if (!up->dma || up->dma->tx_err)
serial8250_tx_chars(up);
- else
+ else if (!up->dma->tx_running)
__stop_tx(up);
}
@@ -2960,8 +2960,10 @@ 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/Kconfig b/drivers/tty/serial/Kconfig
index f92963a2226b..877173907c53 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1083,8 +1083,8 @@ config SERIAL_TIMBERDALE
config SERIAL_BCM63XX
tristate "Broadcom BCM63xx/BCM33xx UART support"
select SERIAL_CORE
- depends on ARCH_BCM4908 || ARCH_BCM_63XX || BCM63XX || BMIPS_GENERIC || COMPILE_TEST
- default ARCH_BCM4908 || ARCH_BCM_63XX || BCM63XX || BMIPS_GENERIC
+ depends on ARCH_BCM4908 || ARCH_BCMBCA || BCM63XX || BMIPS_GENERIC || COMPILE_TEST
+ default ARCH_BCM4908 || ARCH_BCMBCA || BCM63XX || BMIPS_GENERIC
help
This enables the driver for the onchip UART core found on
the following chipsets:
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index abeceeefdece..15f0e4d88c5a 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1367,6 +1367,15 @@ 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 =
@@ -1788,9 +1797,10 @@ 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);
@@ -1812,7 +1822,14 @@ 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)
@@ -2225,6 +2242,8 @@ 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/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c
index e50f069b5ebb..3f1986c89694 100644
--- a/drivers/tty/serial/mpc52xx_uart.c
+++ b/drivers/tty/serial/mpc52xx_uart.c
@@ -1630,7 +1630,7 @@ mpc52xx_console_setup(struct console *co, char *options)
return ret;
}
- uartclk = mpc5xxx_get_bus_frequency(np);
+ uartclk = mpc5xxx_fwnode_get_bus_frequency(of_fwnode_handle(np));
if (uartclk == 0) {
pr_debug("Could not find uart clock frequency!\n");
return -EINVAL;
@@ -1747,7 +1747,7 @@ static int mpc52xx_uart_of_probe(struct platform_device *op)
/* set the uart clock to the input clock of the psc, the different
* prescalers are taken into account in the set_baudrate() methods
* of the respective chip */
- uartclk = mpc5xxx_get_bus_frequency(op->dev.of_node);
+ uartclk = mpc5xxx_get_bus_frequency(&op->dev);
if (uartclk == 0) {
dev_dbg(&op->dev, "Could not find uart clock frequency!\n");
return -EINVAL;
diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c
index ff61a8d00014..65eaecd10b7c 100644
--- a/drivers/tty/serial/mvebu-uart.c
+++ b/drivers/tty/serial/mvebu-uart.c
@@ -481,14 +481,14 @@ 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)
{
unsigned int d_divisor, m_divisor;
unsigned long flags;
u32 brdv, osamp;
if (!port->uartclk)
- return -EOPNOTSUPP;
+ return 0;
/*
* The baudrate is derived from the UART clock thanks to divisors:
@@ -559,7 +559,7 @@ static int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud)
(m_divisor << 16) | (m_divisor << 24);
writel(osamp, port->membase + UART_OSAMP);
- return 0;
+ return DIV_ROUND_CLOSEST(port->uartclk, d_divisor * m_divisor);
}
static void mvebu_uart_set_termios(struct uart_port *port,
@@ -598,15 +598,11 @@ static void mvebu_uart_set_termios(struct uart_port *port,
max_baud = port->uartclk / 80;
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) {
@@ -617,6 +613,11 @@ 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/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index f7c1f1807040..f4698a064a4d 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -1,6 +1,9 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2017-2018, The Linux foundation. All rights reserved.
+/* Disable MMIO tracing to prevent excessive logging of unwanted MMIO traces */
+#define __DISABLE_TRACE_MMIO__
+
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/io.h>
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 0fd4ac58c6ce..b7a4b47ce74e 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -383,8 +383,7 @@ 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);
@@ -680,7 +679,7 @@ 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_core.c b/drivers/tty/serial/serial_core.c
index 339f4c421503..12c87cd201a7 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2059,11 +2059,6 @@ static int uart_proc_show(struct seq_file *m, void *v)
}
#endif
-static inline bool uart_console_enabled(struct uart_port *port)
-{
- return uart_console(port) && (port->cons->flags & CON_ENABLED);
-}
-
static void uart_port_spin_lock_init(struct uart_port *port)
{
spin_lock_init(&port->lock);
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index f8ea95d14309..2c85dbf165c4 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -141,6 +141,8 @@ static void stm32_usart_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/sysrq.c b/drivers/tty/sysrq.c
index 18e623325887..d2b2720db6ca 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -581,7 +581,6 @@ void __handle_sysrq(int key, bool check_mask)
rcu_sysrq_start();
rcu_read_lock();
- printk_prefer_direct_enter();
/*
* Raise the apparent loglevel to maximum so that the sysrq header
* is shown to provide the user with positive feedback. We do not
@@ -623,7 +622,6 @@ void __handle_sysrq(int key, bool check_mask)
pr_cont("\n");
console_loglevel = orig_log_level;
}
- printk_prefer_direct_exit();
rcu_read_unlock();
rcu_sysrq_end();
diff --git a/drivers/tty/tty.h b/drivers/tty/tty.h
index b710c5ef89ab..f310a8274df1 100644
--- a/drivers/tty/tty.h
+++ b/drivers/tty/tty.h
@@ -111,4 +111,7 @@ static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch)
ssize_t redirected_tty_write(struct kiocb *, struct iov_iter *);
+int tty_insert_flip_string_and_push_buffer(struct tty_port *port,
+ const unsigned char *chars, size_t cnt);
+
#endif
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index 754fa43670cc..9fdecc795b6b 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -573,6 +573,15 @@ 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 - push terminal buffers
* @port: tty port to push
@@ -587,16 +596,43 @@ void tty_flip_buffer_push(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);
+ 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
* @port: tty port to initialise
*
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index cc8b9a3e58f1..ae9c926acd6f 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -855,7 +855,7 @@ static void delete_char(struct vc_data *vc, unsigned int nr)
unsigned short *p = (unsigned short *) vc->vc_pos;
vc_uniscr_delete(vc, nr);
- scr_memcpyw(p, p + nr, (vc->vc_cols - vc->state.x - nr) * 2);
+ scr_memmovew(p, p + nr, (vc->vc_cols - vc->state.x - nr) * 2);
scr_memsetw(p + vc->vc_cols - vc->state.x - nr, vc->vc_video_erase_char,
nr * 2);
vc->vc_need_wrap = 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-12 15:43:06 +0000