[PATCH 0/5] tty/serial termbits cleanups

[PATCH 0/5] tty/serial termbits cleanups

[Ilpo Järvinen]

A few simple cleanups that I've come across while playing with the
termbits.

Ilpo Järvinen (5):
  tty/termbits: remove #ifdef CMSPAR that is always defined
  tty/termbits: remove #ifdef BOTHER that is always defined
  tty/termbits: remove #ifdef IBSHIFT that is always defined
  serial: fsl_lpuart: Remove unnecessary clearing for CRTSCTS
  serial: jsm: Use B0 instead of 0

 drivers/char/pcmcia/synclink_cs.c   |  2 --
 drivers/tty/amiserial.c             |  2 --
 drivers/tty/mxser.c                 |  2 --
 drivers/tty/serial/8250/8250_port.c |  2 --
 drivers/tty/serial/fsl_lpuart.c     |  8 +++-----
 drivers/tty/serial/jsm/jsm_cls.c    |  8 +-------
 drivers/tty/serial/jsm/jsm_neo.c    |  8 +-------
 drivers/tty/serial/sunsu.c          |  2 --
 drivers/tty/tty_baudrate.c          | 31 ++++++-----------------------
 drivers/tty/tty_ioctl.c             |  2 --
 drivers/usb/class/cdc-acm.h         |  8 --------
 drivers/usb/serial/ark3116.c        |  3 +--
 drivers/usb/serial/whiteheat.c      |  4 ----
 13 files changed, 12 insertions(+), 70 deletions(-)

-- 
2.30.2

[PATCH 1/5] tty/termbits: remove #ifdef CMSPAR that is always defined

[Ilpo Järvinen]

CMSPAR is defined by all architectures.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/char/pcmcia/synclink_cs.c   | 2 --
 drivers/tty/amiserial.c             | 2 --
 drivers/tty/serial/8250/8250_port.c | 2 --
 drivers/tty/serial/jsm/jsm_cls.c    | 6 ------
 drivers/tty/serial/jsm/jsm_neo.c    | 6 ------
 drivers/tty/serial/sunsu.c          | 2 --
 drivers/usb/class/cdc-acm.h         | 8 --------
 drivers/usb/serial/ark3116.c        | 3 +--
 drivers/usb/serial/whiteheat.c      | 4 ----
 9 files changed, 1 insertion(+), 34 deletions(-)

diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 78baba55a8b5..c20f2cb784e8 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -1432,10 +1432,8 @@ static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
 			info->params.parity = ASYNC_PARITY_ODD;
 		else
 			info->params.parity = ASYNC_PARITY_EVEN;
-#ifdef CMSPAR
 		if (cflag & CMSPAR)
 			info->params.parity = ASYNC_PARITY_SPACE;
-#endif
 	}
 
 	/* calculate number of jiffies to transmit a full
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 533d02b38e02..afb2d373dd47 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -588,10 +588,8 @@ static void change_speed(struct tty_struct *tty, struct serial_state *info,
 	}
 	if (!(cflag & PARODD))
 		cval |= UART_LCR_EPAR;
-#ifdef CMSPAR
 	if (cflag & CMSPAR)
 		cval |= UART_LCR_SPAR;
-#endif
 
 	/* Determine divisor based on baud rate */
 	baud = tty_get_baud_rate(tty);
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 5591f18f2ea9..78b6dedc43e6 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -2620,10 +2620,8 @@ static unsigned char serial8250_compute_lcr(struct uart_8250_port *up,
 	}
 	if (!(c_cflag & PARODD))
 		cval |= UART_LCR_EPAR;
-#ifdef CMSPAR
 	if (c_cflag & CMSPAR)
 		cval |= UART_LCR_SPAR;
-#endif
 
 	return cval;
 }
diff --git a/drivers/tty/serial/jsm/jsm_cls.c b/drivers/tty/serial/jsm/jsm_cls.c
index 444f233ebd1f..046b624e5f71 100644
--- a/drivers/tty/serial/jsm/jsm_cls.c
+++ b/drivers/tty/serial/jsm/jsm_cls.c
@@ -723,14 +723,8 @@ static void cls_param(struct jsm_channel *ch)
 	if (!(ch->ch_c_cflag & PARODD))
 		lcr |= UART_LCR_EPAR;
 
-	/*
-	 * Not all platforms support mark/space parity,
-	 * so this will hide behind an ifdef.
-	 */
-#ifdef CMSPAR
 	if (ch->ch_c_cflag & CMSPAR)
 		lcr |= UART_LCR_SPAR;
-#endif
 
 	if (ch->ch_c_cflag & CSTOPB)
 		lcr |= UART_LCR_STOP;
diff --git a/drivers/tty/serial/jsm/jsm_neo.c b/drivers/tty/serial/jsm/jsm_neo.c
index 110696cdaa1d..0cf586c10688 100644
--- a/drivers/tty/serial/jsm/jsm_neo.c
+++ b/drivers/tty/serial/jsm/jsm_neo.c
@@ -997,14 +997,8 @@ static void neo_param(struct jsm_channel *ch)
 	if (!(ch->ch_c_cflag & PARODD))
 		lcr |= UART_LCR_EPAR;
 
-	/*
-	 * Not all platforms support mark/space parity,
-	 * so this will hide behind an ifdef.
-	 */
-#ifdef CMSPAR
 	if (ch->ch_c_cflag & CMSPAR)
 		lcr |= UART_LCR_SPAR;
-#endif
 
 	if (ch->ch_c_cflag & CSTOPB)
 		lcr |= UART_LCR_STOP;
diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c
index c31389114b86..fff50b5b82eb 100644
--- a/drivers/tty/serial/sunsu.c
+++ b/drivers/tty/serial/sunsu.c
@@ -798,10 +798,8 @@ sunsu_change_speed(struct uart_port *port, unsigned int cflag,
 		cval |= UART_LCR_PARITY;
 	if (!(cflag & PARODD))
 		cval |= UART_LCR_EPAR;
-#ifdef CMSPAR
 	if (cflag & CMSPAR)
 		cval |= UART_LCR_SPAR;
-#endif
 
 	/*
 	 * Work around a bug in the Oxford Semiconductor 952 rev B
diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index 3aa7f0a3ad71..d26ecd15be60 100644
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -7,14 +7,6 @@
  *
  */
 
-/*
- * CMSPAR, some architectures can't have space and mark parity.
- */
-
-#ifndef CMSPAR
-#define CMSPAR			0
-#endif
-
 /*
  * Major and minor numbers.
  */
diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c
index c0e4df87ff22..39eaa7b97c40 100644
--- a/drivers/usb/serial/ark3116.c
+++ b/drivers/usb/serial/ark3116.c
@@ -208,10 +208,9 @@ static void ark3116_set_termios(struct tty_struct *tty,
 		lcr |= UART_LCR_PARITY;
 	if (!(cflag & PARODD))
 		lcr |= UART_LCR_EPAR;
-#ifdef CMSPAR
 	if (cflag & CMSPAR)
 		lcr |= UART_LCR_SPAR;
-#endif
+
 	/* handshake control */
 	hcr = (cflag & CRTSCTS) ? 0x03 : 0x00;
 
diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
index 06aad0d727dd..332fb92ae575 100644
--- a/drivers/usb/serial/whiteheat.c
+++ b/drivers/usb/serial/whiteheat.c
@@ -30,10 +30,6 @@
 #include <linux/usb/ezusb.h>
 #include "whiteheat.h"			/* WhiteHEAT specific commands */
 
-#ifndef CMSPAR
-#define CMSPAR 0
-#endif
-
 /*
  * Version Information
  */
-- 
2.30.2

[PATCH 2/5] tty/termbits: remove #ifdef BOTHER that is always defined

BOTHER is defined by all architectures.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/tty/mxser.c        |  2 --
 drivers/tty/tty_baudrate.c | 20 +++++---------------
 drivers/tty/tty_ioctl.c    |  2 --
 3 files changed, 5 insertions(+), 19 deletions(-)

diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 6ebd3e4ed859..9ea7bd059d0f 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -528,7 +528,6 @@ static int mxser_set_baud(struct tty_struct *tty, speed_t newspd)
 	outb(quot >> 8, info->ioaddr + UART_DLM);	/* MS of divisor */
 	outb(cval, info->ioaddr + UART_LCR);	/* reset DLAB */
 
-#ifdef BOTHER
 	if (C_BAUD(tty) == BOTHER) {
 		quot = MXSER_BAUD_BASE % newspd;
 		quot *= 8;
@@ -540,7 +539,6 @@ static int mxser_set_baud(struct tty_struct *tty, speed_t newspd)
 
 		mxser_set_must_enum_value(info->ioaddr, quot);
 	} else
-#endif
 		mxser_set_must_enum_value(info->ioaddr, 0);
 
 	return 0;
diff --git a/drivers/tty/tty_baudrate.c b/drivers/tty/tty_baudrate.c
index d903e111dbcb..07bbbfee5635 100644
--- a/drivers/tty/tty_baudrate.c
+++ b/drivers/tty/tty_baudrate.c
@@ -61,11 +61,10 @@ speed_t tty_termios_baud_rate(struct ktermios *termios)
 
 	cbaud = termios->c_cflag & CBAUD;
 
-#ifdef BOTHER
 	/* Magic token for arbitrary speed via c_ispeed/c_ospeed */
 	if (cbaud == BOTHER)
 		return termios->c_ospeed;
-#endif
+
 	if (cbaud & CBAUDEX) {
 		cbaud &= ~CBAUDEX;
 
@@ -97,11 +96,11 @@ speed_t tty_termios_input_baud_rate(struct ktermios *termios)
 
 	if (cbaud == B0)
 		return tty_termios_baud_rate(termios);
-#ifdef BOTHER
+
 	/* Magic token for arbitrary speed via c_ispeed*/
 	if (cbaud == BOTHER)
 		return termios->c_ispeed;
-#endif
+
 	if (cbaud & CBAUDEX) {
 		cbaud &= ~CBAUDEX;
 
@@ -157,7 +156,6 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
 	if (((termios->c_cflag >> IBSHIFT) & CBAUD) != B0)
 		ibinput = 1;	/* An input speed was specified */
 #endif
-#ifdef BOTHER
 	/* If the user asked for a precise weird speed give a precise weird
 	 * answer. If they asked for a Bfoo speed they may have problems
 	 * digesting non-exact replies so fuzz a bit.
@@ -170,7 +168,7 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
 	}
 	if (((termios->c_cflag >> IBSHIFT) & CBAUD) == BOTHER)
 		iclose = 0;
-#endif
+
 	termios->c_cflag &= ~CBAUD;
 #ifdef IBSHIFT
 	termios->c_cflag &= ~(CBAUD << IBSHIFT);
@@ -205,11 +203,7 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
 		}
 	} while (++i < n_baud_table);
 
-	/*
-	 *	If we found no match then use BOTHER if provided or warn
-	 *	the user their platform maintainer needs to wake up if not.
-	 */
-#ifdef BOTHER
+	/* If we found no match then use BOTHER. */
 	if (ofound == -1)
 		termios->c_cflag |= BOTHER;
 	/* Set exact input bits only if the input and output differ or the
@@ -217,10 +211,6 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
 	 */
 	if (ifound == -1 && (ibaud != obaud || ibinput))
 		termios->c_cflag |= (BOTHER << IBSHIFT);
-#else
-	if (ifound == -1 || ofound == -1)
-		pr_warn_once("tty: Unable to return correct speed data as your architecture needs updating.\n");
-#endif
 }
 EXPORT_SYMBOL_GPL(tty_termios_encode_baud_rate);
 
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index 63181925ec1a..adae687f654b 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -562,10 +562,8 @@ static int set_sgttyb(struct tty_struct *tty, struct sgttyb __user *sgttyb)
 	termios.c_cc[VKILL] = tmp.sg_kill;
 	set_sgflags(&termios, tmp.sg_flags);
 	/* Try and encode into Bfoo format */
-#ifdef BOTHER
 	tty_termios_encode_baud_rate(&termios, termios.c_ispeed,
 						termios.c_ospeed);
-#endif
 	up_write(&tty->termios_rwsem);
 	tty_set_termios(tty, &termios);
 	return 0;
-- 
2.30.2

[PATCH 2/5] tty/termbits: remove #ifdef BOTHER that is always defined

[Ilpo Järvinen]

BOTHER is defined by all architectures.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/tty/mxser.c        |  2 --
 drivers/tty/tty_baudrate.c | 20 +++++---------------
 drivers/tty/tty_ioctl.c    |  2 --
 3 files changed, 5 insertions(+), 19 deletions(-)

diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 6ebd3e4ed859..9ea7bd059d0f 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -528,7 +528,6 @@ static int mxser_set_baud(struct tty_struct *tty, speed_t newspd)
 	outb(quot >> 8, info->ioaddr + UART_DLM);	/* MS of divisor */
 	outb(cval, info->ioaddr + UART_LCR);	/* reset DLAB */
 
-#ifdef BOTHER
 	if (C_BAUD(tty) == BOTHER) {
 		quot = MXSER_BAUD_BASE % newspd;
 		quot *= 8;
@@ -540,7 +539,6 @@ static int mxser_set_baud(struct tty_struct *tty, speed_t newspd)
 
 		mxser_set_must_enum_value(info->ioaddr, quot);
 	} else
-#endif
 		mxser_set_must_enum_value(info->ioaddr, 0);
 
 	return 0;
diff --git a/drivers/tty/tty_baudrate.c b/drivers/tty/tty_baudrate.c
index d903e111dbcb..07bbbfee5635 100644
--- a/drivers/tty/tty_baudrate.c
+++ b/drivers/tty/tty_baudrate.c
@@ -61,11 +61,10 @@ speed_t tty_termios_baud_rate(struct ktermios *termios)
 
 	cbaud = termios->c_cflag & CBAUD;
 
-#ifdef BOTHER
 	/* Magic token for arbitrary speed via c_ispeed/c_ospeed */
 	if (cbaud == BOTHER)
 		return termios->c_ospeed;
-#endif
+
 	if (cbaud & CBAUDEX) {
 		cbaud &= ~CBAUDEX;
 
@@ -97,11 +96,11 @@ speed_t tty_termios_input_baud_rate(struct ktermios *termios)
 
 	if (cbaud == B0)
 		return tty_termios_baud_rate(termios);
-#ifdef BOTHER
+
 	/* Magic token for arbitrary speed via c_ispeed*/
 	if (cbaud == BOTHER)
 		return termios->c_ispeed;
-#endif
+
 	if (cbaud & CBAUDEX) {
 		cbaud &= ~CBAUDEX;
 
@@ -157,7 +156,6 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
 	if (((termios->c_cflag >> IBSHIFT) & CBAUD) != B0)
 		ibinput = 1;	/* An input speed was specified */
 #endif
-#ifdef BOTHER
 	/* If the user asked for a precise weird speed give a precise weird
 	 * answer. If they asked for a Bfoo speed they may have problems
 	 * digesting non-exact replies so fuzz a bit.
@@ -170,7 +168,7 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
 	}
 	if (((termios->c_cflag >> IBSHIFT) & CBAUD) == BOTHER)
 		iclose = 0;
-#endif
+
 	termios->c_cflag &= ~CBAUD;
 #ifdef IBSHIFT
 	termios->c_cflag &= ~(CBAUD << IBSHIFT);
@@ -205,11 +203,7 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
 		}
 	} while (++i < n_baud_table);
 
-	/*
-	 *	If we found no match then use BOTHER if provided or warn
-	 *	the user their platform maintainer needs to wake up if not.
-	 */
-#ifdef BOTHER
+	/* If we found no match then use BOTHER. */
 	if (ofound == -1)
 		termios->c_cflag |= BOTHER;
 	/* Set exact input bits only if the input and output differ or the
@@ -217,10 +211,6 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
 	 */
 	if (ifound == -1 && (ibaud != obaud || ibinput))
 		termios->c_cflag |= (BOTHER << IBSHIFT);
-#else
-	if (ifound == -1 || ofound == -1)
-		pr_warn_once("tty: Unable to return correct speed data as your architecture needs updating.\n");
-#endif
 }
 EXPORT_SYMBOL_GPL(tty_termios_encode_baud_rate);
 
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index 63181925ec1a..adae687f654b 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -562,10 +562,8 @@ static int set_sgttyb(struct tty_struct *tty, struct sgttyb __user *sgttyb)
 	termios.c_cc[VKILL] = tmp.sg_kill;
 	set_sgflags(&termios, tmp.sg_flags);
 	/* Try and encode into Bfoo format */
-#ifdef BOTHER
 	tty_termios_encode_baud_rate(&termios, termios.c_ispeed,
 						termios.c_ospeed);
-#endif
 	up_write(&tty->termios_rwsem);
 	tty_set_termios(tty, &termios);
 	return 0;
-- 
2.30.2


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[PATCH 3/5] tty/termbits: remove #ifdef IBSHIFT that is always defined

[Ilpo Järvinen]

IBSHIFT is defined by all architectures.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/tty/tty_baudrate.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/drivers/tty/tty_baudrate.c b/drivers/tty/tty_baudrate.c
index 07bbbfee5635..d10318956c97 100644
--- a/drivers/tty/tty_baudrate.c
+++ b/drivers/tty/tty_baudrate.c
@@ -91,7 +91,6 @@ EXPORT_SYMBOL(tty_termios_baud_rate);
 
 speed_t tty_termios_input_baud_rate(struct ktermios *termios)
 {
-#ifdef IBSHIFT
 	unsigned int cbaud = (termios->c_cflag >> IBSHIFT) & CBAUD;
 
 	if (cbaud == B0)
@@ -110,9 +109,6 @@ speed_t tty_termios_input_baud_rate(struct ktermios *termios)
 			cbaud += 15;
 	}
 	return cbaud >= n_baud_table ? 0 : baud_table[cbaud];
-#else	/* IBSHIFT */
-	return tty_termios_baud_rate(termios);
-#endif	/* IBSHIFT */
 }
 EXPORT_SYMBOL(tty_termios_input_baud_rate);
 
@@ -152,10 +148,9 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
 	termios->c_ispeed = ibaud;
 	termios->c_ospeed = obaud;
 
-#ifdef IBSHIFT
 	if (((termios->c_cflag >> IBSHIFT) & CBAUD) != B0)
 		ibinput = 1;	/* An input speed was specified */
-#endif
+
 	/* If the user asked for a precise weird speed give a precise weird
 	 * answer. If they asked for a Bfoo speed they may have problems
 	 * digesting non-exact replies so fuzz a bit.
@@ -170,9 +165,7 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
 		iclose = 0;
 
 	termios->c_cflag &= ~CBAUD;
-#ifdef IBSHIFT
 	termios->c_cflag &= ~(CBAUD << IBSHIFT);
-#endif
 
 	/*
 	 *	Our goal is to find a close match to the standard baud rate
@@ -194,12 +187,10 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
 			 */
 			if (ofound == i && !ibinput)
 				ifound  = i;
-#ifdef IBSHIFT
 			else {
 				ifound = i;
 				termios->c_cflag |= (baud_bits[i] << IBSHIFT);
 			}
-#endif
 		}
 	} while (++i < n_baud_table);
 
-- 
2.30.2

[PATCH 4/5] serial: fsl_lpuart: Remove unnecessary clearing for CRTSCTS

[Ilpo Järvinen]

if (termios->c_cflag & CRTSCTS) guarantees that CRTSCTS is not ever set
in the else block so clearing it is unnecessary.

While at it, remove also one pair of extra parenthesis.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/tty/serial/fsl_lpuart.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 75b3c36c13bc..d3bb46cb7185 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -2110,12 +2110,10 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
 	if (sport->port.rs485.flags & SER_RS485_ENABLED)
 		termios->c_cflag &= ~CRTSCTS;
 
-	if (termios->c_cflag & CRTSCTS) {
-		modem |= (UARTMODIR_RXRTSE | UARTMODIR_TXCTSE);
-	} else {
-		termios->c_cflag &= ~CRTSCTS;
+	if (termios->c_cflag & CRTSCTS)
+		modem |= UARTMODIR_RXRTSE | UARTMODIR_TXCTSE;
+	else
 		modem &= ~(UARTMODIR_RXRTSE | UARTMODIR_TXCTSE);
-	}
 
 	if (termios->c_cflag & CSTOPB)
 		bd |= UARTBAUD_SBNS;
-- 
2.30.2

[PATCH 5/5] serial: jsm: Use B0 instead of 0

[Ilpo Järvinen]

Use B0 to check zero baudrate rather than literal 0.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/tty/serial/jsm/jsm_cls.c | 2 +-
 drivers/tty/serial/jsm/jsm_neo.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/jsm/jsm_cls.c b/drivers/tty/serial/jsm/jsm_cls.c
index 046b624e5f71..ca05e84a7c90 100644
--- a/drivers/tty/serial/jsm/jsm_cls.c
+++ b/drivers/tty/serial/jsm/jsm_cls.c
@@ -689,7 +689,7 @@ static void cls_param(struct jsm_channel *ch)
 	/*
 	 * If baud rate is zero, flush queues, and set mval to drop DTR.
 	 */
-	if ((ch->ch_c_cflag & (CBAUD)) == 0) {
+	if ((ch->ch_c_cflag & (CBAUD)) == B0) {
 		ch->ch_r_head = 0;
 		ch->ch_r_tail = 0;
 		ch->ch_e_head = 0;
diff --git a/drivers/tty/serial/jsm/jsm_neo.c b/drivers/tty/serial/jsm/jsm_neo.c
index 0cf586c10688..95bebf2a73d3 100644
--- a/drivers/tty/serial/jsm/jsm_neo.c
+++ b/drivers/tty/serial/jsm/jsm_neo.c
@@ -938,7 +938,7 @@ static void neo_param(struct jsm_channel *ch)
 	/*
 	 * If baud rate is zero, flush queues, and set mval to drop DTR.
 	 */
-	if ((ch->ch_c_cflag & (CBAUD)) == 0) {
+	if ((ch->ch_c_cflag & (CBAUD)) == B0) {
 		ch->ch_r_head = ch->ch_r_tail = 0;
 		ch->ch_e_head = ch->ch_e_tail = 0;
 
-- 
2.30.2

Re: [PATCH 1/5] tty/termbits: remove #ifdef CMSPAR that is always defined

[Johan Hovold]

On Wed, May 11, 2022 at 01:11:35PM +0300, Ilpo Järvinen wrote:
> CMSPAR is defined by all architectures.

For the sake of reviewers please say something about when this changed. 

Also no need to be so verbose in your Subjects

	tty: remove CMSPAR ifdefs

works just fine and is more in line with the prefix typically used for
this subsystem.

> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
> ---
>  drivers/char/pcmcia/synclink_cs.c   | 2 --
>  drivers/tty/amiserial.c             | 2 --
>  drivers/tty/serial/8250/8250_port.c | 2 --
>  drivers/tty/serial/jsm/jsm_cls.c    | 6 ------
>  drivers/tty/serial/jsm/jsm_neo.c    | 6 ------
>  drivers/tty/serial/sunsu.c          | 2 --
>  drivers/usb/class/cdc-acm.h         | 8 --------
>  drivers/usb/serial/ark3116.c        | 3 +--
>  drivers/usb/serial/whiteheat.c      | 4 ----
>  9 files changed, 1 insertion(+), 34 deletions(-)

The change itself looks good otherwise.

Reviewed-by: Johan Hovold <johan@kernel.org>

> diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
> index 78baba55a8b5..c20f2cb784e8 100644
> --- a/drivers/char/pcmcia/synclink_cs.c
> +++ b/drivers/char/pcmcia/synclink_cs.c
> @@ -1432,10 +1432,8 @@ static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
>  			info->params.parity = ASYNC_PARITY_ODD;
>  		else
>  			info->params.parity = ASYNC_PARITY_EVEN;
> -#ifdef CMSPAR
>  		if (cflag & CMSPAR)
>  			info->params.parity = ASYNC_PARITY_SPACE;
> -#endif
>  	}
>  
>  	/* calculate number of jiffies to transmit a full
> diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
> index 533d02b38e02..afb2d373dd47 100644
> --- a/drivers/tty/amiserial.c
> +++ b/drivers/tty/amiserial.c
> @@ -588,10 +588,8 @@ static void change_speed(struct tty_struct *tty, struct serial_state *info,
>  	}
>  	if (!(cflag & PARODD))
>  		cval |= UART_LCR_EPAR;
> -#ifdef CMSPAR
>  	if (cflag & CMSPAR)
>  		cval |= UART_LCR_SPAR;
> -#endif
>  
>  	/* Determine divisor based on baud rate */
>  	baud = tty_get_baud_rate(tty);
> diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
> index 5591f18f2ea9..78b6dedc43e6 100644
> --- a/drivers/tty/serial/8250/8250_port.c
> +++ b/drivers/tty/serial/8250/8250_port.c
> @@ -2620,10 +2620,8 @@ static unsigned char serial8250_compute_lcr(struct uart_8250_port *up,
>  	}
>  	if (!(c_cflag & PARODD))
>  		cval |= UART_LCR_EPAR;
> -#ifdef CMSPAR
>  	if (c_cflag & CMSPAR)
>  		cval |= UART_LCR_SPAR;
> -#endif
>  
>  	return cval;
>  }
> diff --git a/drivers/tty/serial/jsm/jsm_cls.c b/drivers/tty/serial/jsm/jsm_cls.c
> index 444f233ebd1f..046b624e5f71 100644
> --- a/drivers/tty/serial/jsm/jsm_cls.c
> +++ b/drivers/tty/serial/jsm/jsm_cls.c
> @@ -723,14 +723,8 @@ static void cls_param(struct jsm_channel *ch)
>  	if (!(ch->ch_c_cflag & PARODD))
>  		lcr |= UART_LCR_EPAR;
>  
> -	/*
> -	 * Not all platforms support mark/space parity,
> -	 * so this will hide behind an ifdef.
> -	 */
> -#ifdef CMSPAR
>  	if (ch->ch_c_cflag & CMSPAR)
>  		lcr |= UART_LCR_SPAR;
> -#endif
>  
>  	if (ch->ch_c_cflag & CSTOPB)
>  		lcr |= UART_LCR_STOP;
> diff --git a/drivers/tty/serial/jsm/jsm_neo.c b/drivers/tty/serial/jsm/jsm_neo.c
> index 110696cdaa1d..0cf586c10688 100644
> --- a/drivers/tty/serial/jsm/jsm_neo.c
> +++ b/drivers/tty/serial/jsm/jsm_neo.c
> @@ -997,14 +997,8 @@ static void neo_param(struct jsm_channel *ch)
>  	if (!(ch->ch_c_cflag & PARODD))
>  		lcr |= UART_LCR_EPAR;
>  
> -	/*
> -	 * Not all platforms support mark/space parity,
> -	 * so this will hide behind an ifdef.
> -	 */
> -#ifdef CMSPAR
>  	if (ch->ch_c_cflag & CMSPAR)
>  		lcr |= UART_LCR_SPAR;
> -#endif
>  
>  	if (ch->ch_c_cflag & CSTOPB)
>  		lcr |= UART_LCR_STOP;
> diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c
> index c31389114b86..fff50b5b82eb 100644
> --- a/drivers/tty/serial/sunsu.c
> +++ b/drivers/tty/serial/sunsu.c
> @@ -798,10 +798,8 @@ sunsu_change_speed(struct uart_port *port, unsigned int cflag,
>  		cval |= UART_LCR_PARITY;
>  	if (!(cflag & PARODD))
>  		cval |= UART_LCR_EPAR;
> -#ifdef CMSPAR
>  	if (cflag & CMSPAR)
>  		cval |= UART_LCR_SPAR;
> -#endif
>  
>  	/*
>  	 * Work around a bug in the Oxford Semiconductor 952 rev B
> diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
> index 3aa7f0a3ad71..d26ecd15be60 100644
> --- a/drivers/usb/class/cdc-acm.h
> +++ b/drivers/usb/class/cdc-acm.h
> @@ -7,14 +7,6 @@
>   *
>   */
>  
> -/*
> - * CMSPAR, some architectures can't have space and mark parity.
> - */
> -
> -#ifndef CMSPAR
> -#define CMSPAR			0
> -#endif
> -
>  /*
>   * Major and minor numbers.
>   */
> diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c
> index c0e4df87ff22..39eaa7b97c40 100644
> --- a/drivers/usb/serial/ark3116.c
> +++ b/drivers/usb/serial/ark3116.c
> @@ -208,10 +208,9 @@ static void ark3116_set_termios(struct tty_struct *tty,
>  		lcr |= UART_LCR_PARITY;
>  	if (!(cflag & PARODD))
>  		lcr |= UART_LCR_EPAR;
> -#ifdef CMSPAR
>  	if (cflag & CMSPAR)
>  		lcr |= UART_LCR_SPAR;
> -#endif
> +
>  	/* handshake control */
>  	hcr = (cflag & CRTSCTS) ? 0x03 : 0x00;
>  
> diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
> index 06aad0d727dd..332fb92ae575 100644
> --- a/drivers/usb/serial/whiteheat.c
> +++ b/drivers/usb/serial/whiteheat.c
> @@ -30,10 +30,6 @@
>  #include <linux/usb/ezusb.h>
>  #include "whiteheat.h"			/* WhiteHEAT specific commands */
>  
> -#ifndef CMSPAR
> -#define CMSPAR 0
> -#endif
> -
>  /*
>   * Version Information
>   */

Johan

Re: [PATCH 2/5] tty/termbits: remove #ifdef BOTHER that is always defined

[Johan Hovold]

On Wed, May 11, 2022 at 01:11:36PM +0300, Ilpo Järvinen wrote:
> BOTHER is defined by all architectures.

This changed quite recently so please mention the commit in question.

No need for the verbose Subject here either.

> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
> ---
>  drivers/tty/mxser.c        |  2 --
>  drivers/tty/tty_baudrate.c | 20 +++++---------------
>  drivers/tty/tty_ioctl.c    |  2 --
>  3 files changed, 5 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
> index 6ebd3e4ed859..9ea7bd059d0f 100644
> --- a/drivers/tty/mxser.c
> +++ b/drivers/tty/mxser.c
> @@ -528,7 +528,6 @@ static int mxser_set_baud(struct tty_struct *tty, speed_t newspd)
>  	outb(quot >> 8, info->ioaddr + UART_DLM);	/* MS of divisor */
>  	outb(cval, info->ioaddr + UART_LCR);	/* reset DLAB */
>  
> -#ifdef BOTHER
>  	if (C_BAUD(tty) == BOTHER) {
>  		quot = MXSER_BAUD_BASE % newspd;
>  		quot *= 8;
> @@ -540,7 +539,6 @@ static int mxser_set_baud(struct tty_struct *tty, speed_t newspd)
>  
>  		mxser_set_must_enum_value(info->ioaddr, quot);
>  	} else
> -#endif
>  		mxser_set_must_enum_value(info->ioaddr, 0);

When removing the ifdef, please add the missing bracket to the else
branch as per the coding standard.

Johan

Re: [PATCH 2/5] tty/termbits: remove #ifdef BOTHER that is always defined

[Johan Hovold]

On Wed, May 11, 2022 at 01:11:36PM +0300, Ilpo Järvinen wrote:
> BOTHER is defined by all architectures.

This changed quite recently so please mention the commit in question.

No need for the verbose Subject here either.

> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
> ---
>  drivers/tty/mxser.c        |  2 --
>  drivers/tty/tty_baudrate.c | 20 +++++---------------
>  drivers/tty/tty_ioctl.c    |  2 --
>  3 files changed, 5 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
> index 6ebd3e4ed859..9ea7bd059d0f 100644
> --- a/drivers/tty/mxser.c
> +++ b/drivers/tty/mxser.c
> @@ -528,7 +528,6 @@ static int mxser_set_baud(struct tty_struct *tty, speed_t newspd)
>  	outb(quot >> 8, info->ioaddr + UART_DLM);	/* MS of divisor */
>  	outb(cval, info->ioaddr + UART_LCR);	/* reset DLAB */
>  
> -#ifdef BOTHER
>  	if (C_BAUD(tty) == BOTHER) {
>  		quot = MXSER_BAUD_BASE % newspd;
>  		quot *= 8;
> @@ -540,7 +539,6 @@ static int mxser_set_baud(struct tty_struct *tty, speed_t newspd)
>  
>  		mxser_set_must_enum_value(info->ioaddr, quot);
>  	} else
> -#endif
>  		mxser_set_must_enum_value(info->ioaddr, 0);

When removing the ifdef, please add the missing bracket to the else
branch as per the coding standard.

Johan

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Re: [PATCH 3/5] tty/termbits: remove #ifdef IBSHIFT that is always defined

[Johan Hovold]

On Wed, May 11, 2022 at 01:11:37PM +0300, Ilpo Järvinen wrote:
> IBSHIFT is defined by all architectures.

This also changed recently so mention the commit in question.

Subject is overly verbose here too.

> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
> ---
>  drivers/tty/tty_baudrate.c | 11 +----------
>  1 file changed, 1 insertion(+), 10 deletions(-)
> 
> diff --git a/drivers/tty/tty_baudrate.c b/drivers/tty/tty_baudrate.c
> index 07bbbfee5635..d10318956c97 100644
> --- a/drivers/tty/tty_baudrate.c
> +++ b/drivers/tty/tty_baudrate.c

> @@ -194,12 +187,10 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
>  			 */
>  			if (ofound == i && !ibinput)
>  				ifound  = i;
> -#ifdef IBSHIFT
>  			else {
>  				ifound = i;
>  				termios->c_cflag |= (baud_bits[i] << IBSHIFT);
>  			}
> -#endif

Please add the missing brackets to the if branch when removing the ifdef.

Johan

Re: [PATCH 4/5] serial: fsl_lpuart: Remove unnecessary clearing for CRTSCTS

[Johan Hovold]

On Wed, May 11, 2022 at 01:11:38PM +0300, Ilpo Järvinen wrote:
> if (termios->c_cflag & CRTSCTS) guarantees that CRTSCTS is not ever set
> in the else block so clearing it is unnecessary.
> 
> While at it, remove also one pair of extra parenthesis.
> 
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

Reviewed-by: Johan Hovold <johan@kernel.org>

Re: [PATCH 5/5] serial: jsm: Use B0 instead of 0

[Johan Hovold]

On Wed, May 11, 2022 at 01:11:39PM +0300, Ilpo Järvinen wrote:
> Use B0 to check zero baudrate rather than literal 0.
> 
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
> ---
>  drivers/tty/serial/jsm/jsm_cls.c | 2 +-
>  drivers/tty/serial/jsm/jsm_neo.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/tty/serial/jsm/jsm_cls.c b/drivers/tty/serial/jsm/jsm_cls.c
> index 046b624e5f71..ca05e84a7c90 100644
> --- a/drivers/tty/serial/jsm/jsm_cls.c
> +++ b/drivers/tty/serial/jsm/jsm_cls.c
> @@ -689,7 +689,7 @@ static void cls_param(struct jsm_channel *ch)
>  	/*
>  	 * If baud rate is zero, flush queues, and set mval to drop DTR.
>  	 */
> -	if ((ch->ch_c_cflag & (CBAUD)) == 0) {
> +	if ((ch->ch_c_cflag & (CBAUD)) == B0) {

Sure, why not. How about dropping the unnecessary parenthesis around
CBAUD while at it?

Johan