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From: Jiri Slaby <jslaby@suse.cz>
To: gregkh@linuxfoundation.org
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
	Jiri Slaby <jslaby@suse.cz>, Johan Hovold <johan@kernel.org>,
	linux-usb@vger.kernel.org
Subject: [PATCH 23/35] USB: serial: make usb_serial_driver::write_room return uint
Date: Wed,  5 May 2021 11:19:16 +0200	[thread overview]
Message-ID: <20210505091928.22010-24-jslaby@suse.cz> (raw)
In-Reply-To: <20210505091928.22010-1-jslaby@suse.cz>

Line disciplines expect a positive value or zero returned from
tty->ops->write_room (invoked by tty_write_room). Both of them were
switched in the previous patch. So now, switch also
usb_serial_driver::write_room and all its users.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Johan Hovold <johan@kernel.org>
Cc: linux-usb@vger.kernel.org
---
 drivers/usb/serial/cyberjack.c        | 4 ++--
 drivers/usb/serial/cypress_m8.c       | 8 ++++----
 drivers/usb/serial/digi_acceleport.c  | 8 ++++----
 drivers/usb/serial/garmin_gps.c       | 2 +-
 drivers/usb/serial/generic.c          | 6 +++---
 drivers/usb/serial/io_edgeport.c      | 6 +++---
 drivers/usb/serial/io_ti.c            | 6 +++---
 drivers/usb/serial/ir-usb.c           | 6 +++---
 drivers/usb/serial/keyspan.c          | 4 ++--
 drivers/usb/serial/kobil_sct.c        | 4 ++--
 drivers/usb/serial/mos7720.c          | 6 +++---
 drivers/usb/serial/mos7840.c          | 7 +++----
 drivers/usb/serial/opticon.c          | 2 +-
 drivers/usb/serial/oti6858.c          | 6 +++---
 drivers/usb/serial/quatech2.c         | 4 ++--
 drivers/usb/serial/sierra.c           | 2 +-
 drivers/usb/serial/ti_usb_3410_5052.c | 8 ++++----
 drivers/usb/serial/usb-wwan.h         | 2 +-
 drivers/usb/serial/usb_wwan.c         | 6 +++---
 include/linux/usb/serial.h            | 4 ++--
 20 files changed, 50 insertions(+), 51 deletions(-)

diff --git a/drivers/usb/serial/cyberjack.c b/drivers/usb/serial/cyberjack.c
index cf389224d528..51e5aac3bf4c 100644
--- a/drivers/usb/serial/cyberjack.c
+++ b/drivers/usb/serial/cyberjack.c
@@ -53,7 +53,7 @@ static int  cyberjack_open(struct tty_struct *tty,
 static void cyberjack_close(struct usb_serial_port *port);
 static int cyberjack_write(struct tty_struct *tty,
 	struct usb_serial_port *port, const unsigned char *buf, int count);
-static int cyberjack_write_room(struct tty_struct *tty);
+static unsigned int cyberjack_write_room(struct tty_struct *tty);
 static void cyberjack_read_int_callback(struct urb *urb);
 static void cyberjack_read_bulk_callback(struct urb *urb);
 static void cyberjack_write_bulk_callback(struct urb *urb);
@@ -240,7 +240,7 @@ static int cyberjack_write(struct tty_struct *tty,
 	return count;
 }
 
-static int cyberjack_write_room(struct tty_struct *tty)
+static unsigned int cyberjack_write_room(struct tty_struct *tty)
 {
 	/* FIXME: .... */
 	return CYBERJACK_LOCAL_BUF_SIZE;
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index 166ee2286fda..5e7d2f9fa0c2 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -122,7 +122,7 @@ static void cypress_dtr_rts(struct usb_serial_port *port, int on);
 static int  cypress_write(struct tty_struct *tty, struct usb_serial_port *port,
 			const unsigned char *buf, int count);
 static void cypress_send(struct usb_serial_port *port);
-static int  cypress_write_room(struct tty_struct *tty);
+static unsigned int cypress_write_room(struct tty_struct *tty);
 static void cypress_earthmate_init_termios(struct tty_struct *tty);
 static void cypress_set_termios(struct tty_struct *tty,
 			struct usb_serial_port *port, struct ktermios *old);
@@ -789,18 +789,18 @@ static void cypress_send(struct usb_serial_port *port)
 
 
 /* returns how much space is available in the soft buffer */
-static int cypress_write_room(struct tty_struct *tty)
+static unsigned int cypress_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct cypress_private *priv = usb_get_serial_port_data(port);
-	int room = 0;
+	unsigned int room;
 	unsigned long flags;
 
 	spin_lock_irqsave(&priv->lock, flags);
 	room = kfifo_avail(&priv->write_fifo);
 	spin_unlock_irqrestore(&priv->lock, flags);
 
-	dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
+	dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);
 	return room;
 }
 
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index 8b2f06539f2c..5deb900450ee 100644
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -223,7 +223,7 @@ static int digi_tiocmset(struct tty_struct *tty, unsigned int set,
 static int digi_write(struct tty_struct *tty, struct usb_serial_port *port,
 		const unsigned char *buf, int count);
 static void digi_write_bulk_callback(struct urb *urb);
-static int digi_write_room(struct tty_struct *tty);
+static unsigned int digi_write_room(struct tty_struct *tty);
 static int digi_chars_in_buffer(struct tty_struct *tty);
 static int digi_open(struct tty_struct *tty, struct usb_serial_port *port);
 static void digi_close(struct usb_serial_port *port);
@@ -1020,11 +1020,11 @@ static void digi_write_bulk_callback(struct urb *urb)
 		tty_port_tty_wakeup(&port->port);
 }
 
-static int digi_write_room(struct tty_struct *tty)
+static unsigned int digi_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct digi_port *priv = usb_get_serial_port_data(port);
-	int room;
+	unsigned int room;
 	unsigned long flags = 0;
 
 	spin_lock_irqsave(&priv->dp_port_lock, flags);
@@ -1035,7 +1035,7 @@ static int digi_write_room(struct tty_struct *tty)
 		room = port->bulk_out_size - 2 - priv->dp_out_buf_len;
 
 	spin_unlock_irqrestore(&priv->dp_port_lock, flags);
-	dev_dbg(&port->dev, "digi_write_room: port=%d, room=%d\n", priv->dp_port_num, room);
+	dev_dbg(&port->dev, "digi_write_room: port=%d, room=%u\n", priv->dp_port_num, room);
 	return room;
 
 }
diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c
index 50e8bdc77e71..756d1ac7e96f 100644
--- a/drivers/usb/serial/garmin_gps.c
+++ b/drivers/usb/serial/garmin_gps.c
@@ -1113,7 +1113,7 @@ static int garmin_write(struct tty_struct *tty, struct usb_serial_port *port,
 }
 
 
-static int garmin_write_room(struct tty_struct *tty)
+static unsigned int garmin_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	/*
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index d10aa3d2ee49..bc3cf66af0de 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -230,11 +230,11 @@ int usb_serial_generic_write(struct tty_struct *tty,
 }
 EXPORT_SYMBOL_GPL(usb_serial_generic_write);
 
-int usb_serial_generic_write_room(struct tty_struct *tty)
+unsigned int usb_serial_generic_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	unsigned long flags;
-	int room;
+	unsigned int room;
 
 	if (!port->bulk_out_size)
 		return 0;
@@ -243,7 +243,7 @@ int usb_serial_generic_write_room(struct tty_struct *tty)
 	room = kfifo_avail(&port->write_fifo);
 	spin_unlock_irqrestore(&port->lock, flags);
 
-	dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
+	dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);
 	return room;
 }
 
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index e6fe3882bf69..f6cedc87d3e4 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -1355,11 +1355,11 @@ static void send_more_port_data(struct edgeport_serial *edge_serial,
  *	we return the amount of room that we have for this port	(the txCredits)
  *	otherwise we return a negative error number.
  *****************************************************************************/
-static int edge_write_room(struct tty_struct *tty)
+static unsigned int edge_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
-	int room;
+	unsigned int room;
 	unsigned long flags;
 
 	if (edge_port == NULL)
@@ -1377,7 +1377,7 @@ static int edge_write_room(struct tty_struct *tty)
 	room = edge_port->txCredits - edge_port->txfifo.count;
 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
 
-	dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
+	dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);
 	return room;
 }
 
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index 39503fdccebf..94c82c33e629 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -2067,11 +2067,11 @@ static void edge_send(struct usb_serial_port *port, struct tty_struct *tty)
 		tty_wakeup(tty);
 }
 
-static int edge_write_room(struct tty_struct *tty)
+static unsigned int edge_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
-	int room = 0;
+	unsigned int room;
 	unsigned long flags;
 
 	if (edge_port == NULL)
@@ -2083,7 +2083,7 @@ static int edge_write_room(struct tty_struct *tty)
 	room = kfifo_avail(&port->write_fifo);
 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
 
-	dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
+	dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);
 	return room;
 }
 
diff --git a/drivers/usb/serial/ir-usb.c b/drivers/usb/serial/ir-usb.c
index 172261a908d8..7b44dbea95cd 100644
--- a/drivers/usb/serial/ir-usb.c
+++ b/drivers/usb/serial/ir-usb.c
@@ -47,7 +47,7 @@ static int xbof = -1;
 static int  ir_startup (struct usb_serial *serial);
 static int ir_write(struct tty_struct *tty, struct usb_serial_port *port,
 		const unsigned char *buf, int count);
-static int ir_write_room(struct tty_struct *tty);
+static unsigned int ir_write_room(struct tty_struct *tty);
 static void ir_write_bulk_callback(struct urb *urb);
 static void ir_process_read_urb(struct urb *urb);
 static void ir_set_termios(struct tty_struct *tty,
@@ -339,10 +339,10 @@ static void ir_write_bulk_callback(struct urb *urb)
 	usb_serial_port_softint(port);
 }
 
-static int ir_write_room(struct tty_struct *tty)
+static unsigned int ir_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
-	int count = 0;
+	unsigned int count = 0;
 
 	if (port->bulk_out_size == 0)
 		return 0;
diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index b04a029e3657..87b89c99d517 100644
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -1453,13 +1453,13 @@ static void usa67_glocont_callback(struct urb *urb)
 	}
 }
 
-static int keyspan_write_room(struct tty_struct *tty)
+static unsigned int keyspan_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct keyspan_port_private	*p_priv;
 	const struct keyspan_device_details	*d_details;
 	int				flip;
-	int				data_len;
+	unsigned int			data_len;
 	struct urb			*this_urb;
 
 	p_priv = usb_get_serial_port_data(port);
diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c
index a9bc546626ab..4ed8b8b0a361 100644
--- a/drivers/usb/serial/kobil_sct.c
+++ b/drivers/usb/serial/kobil_sct.c
@@ -53,7 +53,7 @@ static int  kobil_open(struct tty_struct *tty, struct usb_serial_port *port);
 static void kobil_close(struct usb_serial_port *port);
 static int  kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
 			 const unsigned char *buf, int count);
-static int  kobil_write_room(struct tty_struct *tty);
+static unsigned int kobil_write_room(struct tty_struct *tty);
 static int  kobil_ioctl(struct tty_struct *tty,
 			unsigned int cmd, unsigned long arg);
 static int  kobil_tiocmget(struct tty_struct *tty);
@@ -358,7 +358,7 @@ static int kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
 }
 
 
-static int kobil_write_room(struct tty_struct *tty)
+static unsigned int kobil_write_room(struct tty_struct *tty)
 {
 	/* FIXME */
 	return 8;
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 6ee83886e2c9..d9cc7f840d48 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -1033,11 +1033,11 @@ static void mos7720_break(struct tty_struct *tty, int break_state)
  *	If successful, we return the amount of room that we have for this port
  *	Otherwise we return a negative error number.
  */
-static int mos7720_write_room(struct tty_struct *tty)
+static unsigned int mos7720_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct moschip_port *mos7720_port;
-	int room = 0;
+	unsigned int room = 0;
 	int i;
 
 	mos7720_port = usb_get_serial_port_data(port);
@@ -1051,7 +1051,7 @@ static int mos7720_write_room(struct tty_struct *tty)
 			room += URB_TRANSFER_BUFFER_SIZE;
 	}
 
-	dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
+	dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);
 	return room;
 }
 
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 28e4093794e0..f25d4ba43b9a 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -815,15 +815,14 @@ static void mos7840_break(struct tty_struct *tty, int break_state)
  *	this function is called by the tty driver when it wants to know how many
  *	bytes of data we can accept for a specific port.
  *	If successful, we return the amount of room that we have for this port
- *	Otherwise we return a negative error number.
  *****************************************************************************/
 
-static int mos7840_write_room(struct tty_struct *tty)
+static unsigned int mos7840_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
 	int i;
-	int room = 0;
+	unsigned int room = 0;
 	unsigned long flags;
 
 	spin_lock_irqsave(&mos7840_port->pool_lock, flags);
@@ -834,7 +833,7 @@ static int mos7840_write_room(struct tty_struct *tty)
 	spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
 
 	room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
-	dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
+	dev_dbg(&mos7840_port->port->dev, "%s - returns %u\n", __func__, room);
 	return room;
 
 }
diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index 40c713fae0c3..37b51947bd0b 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -267,7 +267,7 @@ static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
 	return ret;
 }
 
-static int opticon_write_room(struct tty_struct *tty)
+static unsigned int opticon_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct opticon_private *priv = usb_get_serial_port_data(port);
diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c
index 65cd0341fa78..4ab9f335dd0e 100644
--- a/drivers/usb/serial/oti6858.c
+++ b/drivers/usb/serial/oti6858.c
@@ -126,7 +126,7 @@ static void oti6858_read_bulk_callback(struct urb *urb);
 static void oti6858_write_bulk_callback(struct urb *urb);
 static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port,
 			const unsigned char *buf, int count);
-static int oti6858_write_room(struct tty_struct *tty);
+static unsigned int oti6858_write_room(struct tty_struct *tty);
 static int oti6858_chars_in_buffer(struct tty_struct *tty);
 static int oti6858_tiocmget(struct tty_struct *tty);
 static int oti6858_tiocmset(struct tty_struct *tty,
@@ -363,10 +363,10 @@ static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port,
 	return count;
 }
 
-static int oti6858_write_room(struct tty_struct *tty)
+static unsigned int oti6858_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
-	int room = 0;
+	unsigned int room;
 	unsigned long flags;
 
 	spin_lock_irqsave(&port->lock, flags);
diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c
index 5f2e7f668e68..3b5f2032ecdb 100644
--- a/drivers/usb/serial/quatech2.c
+++ b/drivers/usb/serial/quatech2.c
@@ -870,12 +870,12 @@ static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch)
 
 }
 
-static int qt2_write_room(struct tty_struct *tty)
+static unsigned int qt2_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct qt2_port_private *port_priv;
 	unsigned long flags = 0;
-	int r;
+	unsigned int r;
 
 	port_priv = usb_get_serial_port_data(port);
 
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 54e16ffc30a0..753cee5d17a1 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -613,7 +613,7 @@ static void sierra_instat_callback(struct urb *urb)
 	}
 }
 
-static int sierra_write_room(struct tty_struct *tty)
+static unsigned int sierra_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct sierra_port_private *portdata = usb_get_serial_port_data(port);
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index caa46ac23db9..2c543c175296 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -307,7 +307,7 @@ static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 static void ti_close(struct usb_serial_port *port);
 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 		const unsigned char *data, int count);
-static int ti_write_room(struct tty_struct *tty);
+static unsigned int ti_write_room(struct tty_struct *tty);
 static int ti_chars_in_buffer(struct tty_struct *tty);
 static bool ti_tx_empty(struct usb_serial_port *port);
 static void ti_throttle(struct tty_struct *tty);
@@ -810,18 +810,18 @@ static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 }
 
 
-static int ti_write_room(struct tty_struct *tty)
+static unsigned int ti_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct ti_port *tport = usb_get_serial_port_data(port);
-	int room = 0;
+	unsigned int room;
 	unsigned long flags;
 
 	spin_lock_irqsave(&tport->tp_lock, flags);
 	room = kfifo_avail(&port->write_fifo);
 	spin_unlock_irqrestore(&tport->tp_lock, flags);
 
-	dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
+	dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);
 	return room;
 }
 
diff --git a/drivers/usb/serial/usb-wwan.h b/drivers/usb/serial/usb-wwan.h
index b5331d03092f..6c7c9f3309b0 100644
--- a/drivers/usb/serial/usb-wwan.h
+++ b/drivers/usb/serial/usb-wwan.h
@@ -11,7 +11,7 @@ extern int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port);
 extern void usb_wwan_close(struct usb_serial_port *port);
 extern int usb_wwan_port_probe(struct usb_serial_port *port);
 extern void usb_wwan_port_remove(struct usb_serial_port *port);
-extern int usb_wwan_write_room(struct tty_struct *tty);
+extern unsigned int usb_wwan_write_room(struct tty_struct *tty);
 extern int usb_wwan_tiocmget(struct tty_struct *tty);
 extern int usb_wwan_tiocmset(struct tty_struct *tty,
 			     unsigned int set, unsigned int clear);
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index 3eb72c59ede6..06212f08d9f9 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -278,12 +278,12 @@ static void usb_wwan_outdat_callback(struct urb *urb)
 	}
 }
 
-int usb_wwan_write_room(struct tty_struct *tty)
+unsigned int usb_wwan_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct usb_wwan_port_private *portdata;
 	int i;
-	int data_len = 0;
+	unsigned int data_len = 0;
 	struct urb *this_urb;
 
 	portdata = usb_get_serial_port_data(port);
@@ -294,7 +294,7 @@ int usb_wwan_write_room(struct tty_struct *tty)
 			data_len += OUT_BUFLEN;
 	}
 
-	dev_dbg(&port->dev, "%s: %d\n", __func__, data_len);
+	dev_dbg(&port->dev, "%s: %u\n", __func__, data_len);
 	return data_len;
 }
 EXPORT_SYMBOL(usb_wwan_write_room);
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 8c63fa9bfc74..6472d1f7b028 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -276,7 +276,7 @@ struct usb_serial_driver {
 	int  (*write)(struct tty_struct *tty, struct usb_serial_port *port,
 			const unsigned char *buf, int count);
 	/* Called only by the tty layer */
-	int  (*write_room)(struct tty_struct *tty);
+	unsigned int (*write_room)(struct tty_struct *tty);
 	int  (*ioctl)(struct tty_struct *tty,
 		      unsigned int cmd, unsigned long arg);
 	void (*get_serial)(struct tty_struct *tty, struct serial_struct *ss);
@@ -347,7 +347,7 @@ int usb_serial_generic_write(struct tty_struct *tty, struct usb_serial_port *por
 		const unsigned char *buf, int count);
 void usb_serial_generic_close(struct usb_serial_port *port);
 int usb_serial_generic_resume(struct usb_serial *serial);
-int usb_serial_generic_write_room(struct tty_struct *tty);
+unsigned int usb_serial_generic_write_room(struct tty_struct *tty);
 int usb_serial_generic_chars_in_buffer(struct tty_struct *tty);
 void usb_serial_generic_wait_until_sent(struct tty_struct *tty, long timeout);
 void usb_serial_generic_read_bulk_callback(struct urb *urb);
-- 
2.31.1


  parent reply	other threads:[~2021-05-05  9:20 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-05  9:18 [PATCH 00/35] tty cleanup for 5.14 Jiri Slaby
2021-05-05  9:18 ` [PATCH 01/35] tty: remove broken r3964 line discipline Jiri Slaby
2021-05-05  9:26   ` Greg KH
2021-05-05  9:18 ` [PATCH 02/35] n_tty: remove n_tty_receive_char wrapper Jiri Slaby
2021-05-05  9:18 ` [PATCH 03/35] n_tty: remove n_tty_receive_char_fast Jiri Slaby
2021-05-05  9:18 ` [PATCH 04/35] n_tty: drop n_tty_receive_buf_fast Jiri Slaby
2021-05-05  9:18 ` [PATCH 05/35] n_tty: drop parmrk_dbl from n_tty_receive_char Jiri Slaby
2021-05-05  9:18 ` [PATCH 06/35] n_tty: move lnext handling Jiri Slaby
2021-05-05  9:19 ` [PATCH 07/35] n_tty: make n_tty_receive_char_special return void Jiri Slaby
2021-05-05  9:19 ` [PATCH 08/35] n_tty: do only one cp dereference in n_tty_receive_buf_standard Jiri Slaby
2021-05-05  9:19 ` [PATCH 09/35] n_tty: invert TTY_NORMAL condition " Jiri Slaby
2021-05-05  9:19 ` [PATCH 10/35] n_tty: remove superfluous return from n_tty_receive_signal_char Jiri Slaby
2021-05-05  9:19 ` [PATCH 11/35] tty: make fp of tty_ldisc_ops::receive_buf{,2} const Jiri Slaby
2021-05-05  9:19 ` [PATCH 12/35] tty: cumulate and document tty_struct::flow* members Jiri Slaby
2021-05-05  9:19 ` [PATCH 13/35] tty: cumulate and document tty_struct::ctrl* members Jiri Slaby
2021-05-05  9:19 ` [PATCH 14/35] tty: set tty_ldisc_ops::num statically Jiri Slaby
2021-05-05  9:19 ` [PATCH 15/35] n_gsm: use goto-failpaths in gsm_init Jiri Slaby
2021-05-05  9:19 ` [PATCH 16/35] tty: make tty_ldisc_ops a param in tty_unregister_ldisc Jiri Slaby
2021-05-05  9:19 ` [PATCH 17/35] tty: drop tty_ldisc_ops::refcount Jiri Slaby
2021-05-05  9:19 ` [PATCH 18/35] tty: no checking of tty_unregister_ldisc Jiri Slaby
2021-05-05  9:19 ` [PATCH 19/35] tty: return void from tty_unregister_ldisc Jiri Slaby
2021-05-05  9:19 ` [PATCH 20/35] ti-st: use goto-failpath in st_core_init Jiri Slaby
2021-05-05  9:19 ` [PATCH 21/35] ti-st: use tty_write_room Jiri Slaby
2021-05-05  9:19 ` [PATCH 22/35] tty: make tty_operations::write_room return uint Jiri Slaby
2021-05-05  9:25   ` Geert Uytterhoeven
2021-05-05 10:34   ` Anton Ivanov
2021-05-05 10:43   ` David Sterba
2021-05-05 11:53   ` Max Filippov
2021-05-05 12:15   ` Alex Elder
2021-05-10 11:27   ` Laurentiu Tudor
2021-05-05  9:19 ` Jiri Slaby [this message]
2021-05-19  9:07   ` [PATCH 23/35] USB: serial: make usb_serial_driver::write_room " Johan Hovold
2021-05-05  9:19 ` [PATCH 24/35] tty: make tty_buffer_space_avail " Jiri Slaby
2021-05-05  9:19 ` [PATCH 25/35] tty: remove tty_operations::chars_in_buffer for non-buffering Jiri Slaby
2021-05-05 11:51   ` Max Filippov
2021-05-06  5:47   ` Jiri Slaby
2021-05-06  5:56     ` Greg KH
2021-05-05  9:19 ` [PATCH 26/35] tty: make tty_operations::chars_in_buffer return uint Jiri Slaby
2021-05-05 10:34   ` Anton Ivanov
2021-05-05 10:43   ` David Sterba
2021-05-05  9:19 ` [PATCH 27/35] serial: make usb_serial_driver::chars_in_buffer " Jiri Slaby
2021-05-19  9:09   ` Johan Hovold
2021-05-05  9:19 ` [PATCH 28/35] nozomi: simplify ntty_chars_in_buffer Jiri Slaby
2021-05-05  9:19 ` [PATCH 29/35] USB: serial: digi_acceleport, simplify digi_chars_in_buffer Jiri Slaby
2021-05-19  9:11   ` Johan Hovold
2021-05-05  9:19 ` [PATCH 30/35] tty: remove empty tty_operations::flush_buffer Jiri Slaby
2021-05-05  9:19 ` [PATCH 31/35] tty: remove empty tty_operations::set_termios Jiri Slaby
2021-05-05 10:34   ` Anton Ivanov
2021-05-05  9:19 ` [PATCH 32/35] isdn: capi, remove optional tty ops Jiri Slaby
2021-05-05  9:19 ` [PATCH 33/35] isdn: capi, drop useless pr_debugs Jiri Slaby
2021-05-05  9:19 ` [PATCH 34/35] tty: make tty_get_byte_size available Jiri Slaby
2021-05-06  7:16   ` Joe Perches
2021-05-06  7:19     ` Jiri Slaby
     [not found]     ` <CAHp75Vfq6ABW7ukwaKmZOF2DszmuHD28S=wcLcFowvRdXTnWmg@mail.gmail.com>
2021-05-06  8:31       ` Jiri Slaby
2021-05-06  9:33         ` Andy Shevchenko
2021-05-06  8:35       ` Joe Perches
2021-05-10  7:00   ` [PATCH v2 " Jiri Slaby
2021-05-10  9:47     ` Johan Hovold
2021-05-13  7:24       ` Jiri Slaby
2021-05-13  9:41         ` Johan Hovold
2021-05-05  9:19 ` [PATCH 35/35] tty: make use of tty_get_byte_size Jiri Slaby
2021-05-10  9:59   ` Johan Hovold
2021-05-13 15:04 ` [PATCH 00/35] tty cleanup for 5.14 Greg KH
2021-05-13 16:20   ` Johan Hovold
2021-05-13 16:29     ` Greg KH
2021-05-14  8:11       ` Johan Hovold
2021-06-10  9:02 ` [PATCH v3 1/4] tty: make tty_get_{char,frame}_size available Jiri Slaby
2021-06-10  9:02   ` [PATCH v3 2/4] mxs-auart: redefine AUART_LINECTRL_WLEN to accept bits count Jiri Slaby
2021-06-10  9:02   ` [PATCH v3 3/4] cypress_m8: switch data_bits to real character bits Jiri Slaby
2021-06-10  9:02   ` [PATCH v3 4/4] tty: make use of tty_get_{char,frame}_size Jiri Slaby
2021-06-10 15:15     ` Alex Elder

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