diff --git a/Documentation/admin-guide/devices.txt b/Documentation/admin-guide/devices.txt
index 06c525e01ea5a07f9427313c77360e75bee9819e..b1b57f638b94f5fa40811434b5ceef455c5e2734 100644
--- a/Documentation/admin-guide/devices.txt
+++ b/Documentation/admin-guide/devices.txt
@@ -2691,7 +2691,7 @@
45 = /dev/ttyMM1 Marvell MPSC - port 1 (obsolete unused)
46 = /dev/ttyCPM0 PPC CPM (SCC or SMC) - port 0
...
- 47 = /dev/ttyCPM5 PPC CPM (SCC or SMC) - port 5
+ 49 = /dev/ttyCPM5 PPC CPM (SCC or SMC) - port 3
50 = /dev/ttyIOC0 Altix serial card
...
81 = /dev/ttyIOC31 Altix serial card
diff --git a/MAINTAINERS b/MAINTAINERS
index b87fbcecd905d12e7f8833fdbf84d5c59398688c..2e1c2d7b854067cef2f8d5026197bf7b28967588 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -21643,11 +21643,17 @@ F: Documentation/translations/zh_TW/
TTY LAYER
M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
M: Jiri Slaby <jirislaby@kernel.org>
+L: linux-kernel@vger.kernel.org
+L: linux-serial@vger.kernel.org
S: Supported
T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
F: Documentation/driver-api/serial/
F: drivers/tty/
+F: drivers/tty/serial/serial_base.h
+F: drivers/tty/serial/serial_base_bus.c
F: drivers/tty/serial/serial_core.c
+F: drivers/tty/serial/serial_ctrl.c
+F: drivers/tty/serial/serial_port.c
F: include/linux/selection.h
F: include/linux/serial.h
F: include/linux/serial_core.h
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index b411a26cc092ce77d24cdb15c22078b330e0ab41..1cdefac4dd1b5dcc03721b342036f946b7ef2a3c 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -3070,8 +3070,10 @@ 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_dwlib.c b/drivers/tty/serial/8250/8250_dwlib.c
index 75f32f054ebb15e64b8fedc80bb743c431f3375f..84843e204a5e80e872ab840e9069cc73a018d38d 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/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 7c9457962a3df89658eba7da008d135cd84037dc..8b7a42e05d6d53eb4c24f795c3e443f0679bd74d 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 1f565a216e748c940db0132c23cccd824a0f7bcb..a19db49327e29a4f85495afcae32b2b3c58b7f89 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 404230c1ebb27f69201705e769a3f69d437b3a2c..0a370b9ea70b149531fb87082bb4b1e958f5760c 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/tty_io.c b/drivers/tty/tty_io.c
index 3959efc717aa1aa05007def4beefefd188ab1c60..63db04b9113aac3fa3d5a578b493cdcf9c624737 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))