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>, Richard Henderson <rth@twiddle.net>,
Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
Matt Turner <mattst88@gmail.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
Helge Deller <deller@gmx.de>, Jeff Dike <jdike@addtoit.com>,
Richard Weinberger <richard@nod.at>,
Anton Ivanov <anton.ivanov@cambridgegreys.com>,
Chris Zankel <chris@zankel.net>,
Max Filippov <jcmvbkbc@gmail.com>, Arnd Bergmann <arnd@arndb.de>,
Samuel Iglesias Gonsalvez <siglesias@igalia.com>,
Jens Taprogge <jens.taprogge@taprogge.org>,
Karsten Keil <isdn@linux-pingi.de>,
Scott Branden <scott.branden@broadcom.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
David Lin <dtwlin@gmail.com>, Johan Hovold <johan@kernel.org>,
Alex Elder <elder@kernel.org>,
Laurentiu Tudor <laurentiu.tudor@nxp.com>,
Jiri Kosina <jikos@kernel.org>, David Sterba <dsterba@suse.com>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Oliver Neukum <oneukum@suse.com>, Felipe Balbi <balbi@kernel.org>,
Mathias Nyman <mathias.nyman@intel.com>,
Marcel Holtmann <marcel@holtmann.org>,
Johan Hedberg <johan.hedberg@gmail.com>,
Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Subject: [PATCH 22/35] tty: make tty_operations::write_room return uint
Date: Wed, 5 May 2021 11:19:15 +0200 [thread overview]
Message-ID: <20210505091928.22010-23-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). So make this
assumption explicit by using unsigned int as a return value. Both of
tty->ops->write_room and tty_write_room.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Cc: Jens Taprogge <jens.taprogge@taprogge.org>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Scott Branden <scott.branden@broadcom.com>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David Lin <dtwlin@gmail.com>
Cc: Johan Hovold <johan@kernel.org>
Cc: Alex Elder <elder@kernel.org>
Cc: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: David Sterba <dsterba@suse.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Oliver Neukum <oneukum@suse.com>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Mathias Nyman <mathias.nyman@intel.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Cc: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
---
arch/alpha/kernel/srmcons.c | 2 +-
arch/m68k/emu/nfcon.c | 2 +-
arch/parisc/kernel/pdc_cons.c | 2 +-
arch/um/drivers/line.c | 6 +++---
arch/um/drivers/line.h | 2 +-
arch/xtensa/platforms/iss/console.c | 2 +-
drivers/char/pcmcia/synclink_cs.c | 2 +-
drivers/char/ttyprintk.c | 2 +-
drivers/ipack/devices/ipoctal.c | 2 +-
drivers/isdn/capi/capi.c | 6 +++---
drivers/misc/bcm-vk/bcm_vk_tty.c | 2 +-
drivers/mmc/core/sdio_uart.c | 2 +-
drivers/net/usb/hso.c | 4 ++--
drivers/s390/char/con3215.c | 2 +-
drivers/s390/char/sclp_tty.c | 4 ++--
drivers/s390/char/sclp_vt220.c | 4 ++--
drivers/s390/char/tty3270.c | 2 +-
drivers/staging/fwserial/fwserial.c | 6 +++---
drivers/staging/gdm724x/gdm_tty.c | 2 +-
drivers/staging/greybus/uart.c | 2 +-
drivers/tty/amiserial.c | 2 +-
drivers/tty/ehv_bytechan.c | 4 ++--
drivers/tty/goldfish.c | 2 +-
drivers/tty/hvc/hvc_console.c | 2 +-
drivers/tty/hvc/hvcs.c | 2 +-
drivers/tty/hvc/hvsi.c | 4 ++--
drivers/tty/ipwireless/tty.c | 2 +-
drivers/tty/mips_ejtag_fdc.c | 4 ++--
drivers/tty/moxa.c | 8 ++++----
drivers/tty/mxser.c | 2 +-
drivers/tty/n_gsm.c | 2 +-
drivers/tty/nozomi.c | 4 ++--
drivers/tty/pty.c | 2 +-
drivers/tty/serial/kgdb_nmi.c | 2 +-
drivers/tty/serial/serial_core.c | 4 ++--
drivers/tty/synclink_gt.c | 6 +++---
drivers/tty/tty_ioctl.c | 2 +-
drivers/tty/ttynull.c | 2 +-
drivers/tty/vcc.c | 4 ++--
drivers/tty/vt/vt.c | 2 +-
drivers/usb/class/cdc-acm.c | 2 +-
drivers/usb/gadget/function/u_serial.c | 6 +++---
drivers/usb/host/xhci-dbgtty.c | 4 ++--
drivers/usb/serial/usb-serial.c | 2 +-
include/linux/tty.h | 2 +-
include/linux/tty_driver.h | 4 ++--
net/bluetooth/rfcomm/tty.c | 2 +-
47 files changed, 71 insertions(+), 71 deletions(-)
diff --git a/arch/alpha/kernel/srmcons.c b/arch/alpha/kernel/srmcons.c
index 438b10c44d73..2110b7e7f988 100644
--- a/arch/alpha/kernel/srmcons.c
+++ b/arch/alpha/kernel/srmcons.c
@@ -142,7 +142,7 @@ srmcons_write(struct tty_struct *tty,
return count;
}
-static int
+static unsigned int
srmcons_write_room(struct tty_struct *tty)
{
return 512;
diff --git a/arch/m68k/emu/nfcon.c b/arch/m68k/emu/nfcon.c
index 57e8c8fb5eba..92636c89d65b 100644
--- a/arch/m68k/emu/nfcon.c
+++ b/arch/m68k/emu/nfcon.c
@@ -85,7 +85,7 @@ static int nfcon_tty_put_char(struct tty_struct *tty, unsigned char ch)
return 1;
}
-static int nfcon_tty_write_room(struct tty_struct *tty)
+static unsigned int nfcon_tty_write_room(struct tty_struct *tty)
{
return 64;
}
diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c
index 7ed404c60a9e..fe2ed0bbd07e 100644
--- a/arch/parisc/kernel/pdc_cons.c
+++ b/arch/parisc/kernel/pdc_cons.c
@@ -103,7 +103,7 @@ static int pdc_console_tty_write(struct tty_struct *tty, const unsigned char *bu
return count;
}
-static int pdc_console_tty_write_room(struct tty_struct *tty)
+static unsigned int pdc_console_tty_write_room(struct tty_struct *tty)
{
return 32768; /* no limit, no buffer used */
}
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 1c70a31e7c5b..2b8810ba5470 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -32,7 +32,7 @@ static irqreturn_t line_interrupt(int irq, void *data)
*
* Should be called while holding line->lock (this does not modify data).
*/
-static int write_room(struct line *line)
+static unsigned int write_room(struct line *line)
{
int n;
@@ -47,11 +47,11 @@ static int write_room(struct line *line)
return n - 1;
}
-int line_write_room(struct tty_struct *tty)
+unsigned int line_write_room(struct tty_struct *tty)
{
struct line *line = tty->driver_data;
unsigned long flags;
- int room;
+ unsigned int room;
spin_lock_irqsave(&line->lock, flags);
room = write_room(line);
diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h
index 01d21e76144f..861edf329569 100644
--- a/arch/um/drivers/line.h
+++ b/arch/um/drivers/line.h
@@ -70,7 +70,7 @@ extern void line_set_termios(struct tty_struct *tty, struct ktermios * old);
extern int line_chars_in_buffer(struct tty_struct *tty);
extern void line_flush_buffer(struct tty_struct *tty);
extern void line_flush_chars(struct tty_struct *tty);
-extern int line_write_room(struct tty_struct *tty);
+extern unsigned int line_write_room(struct tty_struct *tty);
extern void line_throttle(struct tty_struct *tty);
extern void line_unthrottle(struct tty_struct *tty);
diff --git a/arch/xtensa/platforms/iss/console.c b/arch/xtensa/platforms/iss/console.c
index a3dda25a4e45..98ac3a7fdb0a 100644
--- a/arch/xtensa/platforms/iss/console.c
+++ b/arch/xtensa/platforms/iss/console.c
@@ -100,7 +100,7 @@ static void rs_flush_chars(struct tty_struct *tty)
{
}
-static int rs_write_room(struct tty_struct *tty)
+static unsigned int rs_write_room(struct tty_struct *tty)
{
/* Let's say iss can always accept 2K characters.. */
return 2 * 1024;
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index b4707bc3aee8..e4b2c68f44f5 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -1609,7 +1609,7 @@ static int mgslpc_write(struct tty_struct * tty,
/* Return the count of free bytes in transmit buffer
*/
-static int mgslpc_write_room(struct tty_struct *tty)
+static unsigned int mgslpc_write_room(struct tty_struct *tty)
{
MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
int ret;
diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c
index 93f5d11c830b..e93b0af92339 100644
--- a/drivers/char/ttyprintk.c
+++ b/drivers/char/ttyprintk.c
@@ -132,7 +132,7 @@ static int tpk_write(struct tty_struct *tty,
/*
* TTY operations write_room function.
*/
-static int tpk_write_room(struct tty_struct *tty)
+static unsigned int tpk_write_room(struct tty_struct *tty)
{
return TPK_MAX_ROOM;
}
diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index 3940714e4397..ea0f1aeaaa06 100644
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -460,7 +460,7 @@ static int ipoctal_write_tty(struct tty_struct *tty,
return char_copied;
}
-static int ipoctal_write_room(struct tty_struct *tty)
+static unsigned int ipoctal_write_room(struct tty_struct *tty)
{
struct ipoctal_channel *channel = tty->driver_data;
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index fdf87acccd06..c50c454006b3 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -1175,14 +1175,14 @@ static void capinc_tty_flush_chars(struct tty_struct *tty)
handle_minor_recv(mp);
}
-static int capinc_tty_write_room(struct tty_struct *tty)
+static unsigned int capinc_tty_write_room(struct tty_struct *tty)
{
struct capiminor *mp = tty->driver_data;
- int room;
+ unsigned int room;
room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
room *= CAPI_MAX_BLKSIZE;
- pr_debug("capinc_tty_write_room = %d\n", room);
+ pr_debug("capinc_tty_write_room = %u\n", room);
return room;
}
diff --git a/drivers/misc/bcm-vk/bcm_vk_tty.c b/drivers/misc/bcm-vk/bcm_vk_tty.c
index 4d02692ecfc7..dae9eeed84a2 100644
--- a/drivers/misc/bcm-vk/bcm_vk_tty.c
+++ b/drivers/misc/bcm-vk/bcm_vk_tty.c
@@ -214,7 +214,7 @@ static int bcm_vk_tty_write(struct tty_struct *tty,
return count;
}
-static int bcm_vk_tty_write_room(struct tty_struct *tty)
+static unsigned int bcm_vk_tty_write_room(struct tty_struct *tty)
{
struct bcm_vk *vk = dev_get_drvdata(tty->dev);
diff --git a/drivers/mmc/core/sdio_uart.c b/drivers/mmc/core/sdio_uart.c
index dbcac2b7f2fe..c8f4eca7aad4 100644
--- a/drivers/mmc/core/sdio_uart.c
+++ b/drivers/mmc/core/sdio_uart.c
@@ -797,7 +797,7 @@ static int sdio_uart_write(struct tty_struct *tty, const unsigned char *buf,
return ret;
}
-static int sdio_uart_write_room(struct tty_struct *tty)
+static unsigned int sdio_uart_write_room(struct tty_struct *tty)
{
struct sdio_uart_port *port = tty->driver_data;
return FIFO_SIZE - kfifo_len(&port->xmit_fifo);
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index 3ef4b2841402..bb8bb85308ab 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -1357,10 +1357,10 @@ static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
}
/* how much room is there for writing */
-static int hso_serial_write_room(struct tty_struct *tty)
+static unsigned int hso_serial_write_room(struct tty_struct *tty)
{
struct hso_serial *serial = tty->driver_data;
- int room;
+ unsigned int room;
unsigned long flags;
spin_lock_irqsave(&serial->serial_lock, flags);
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 1fd5bca9fa20..c9fd4a05931a 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -924,7 +924,7 @@ static void tty3215_close(struct tty_struct *tty, struct file * filp)
/*
* Returns the amount of free space in the output buffer.
*/
-static int tty3215_write_room(struct tty_struct *tty)
+static unsigned int tty3215_write_room(struct tty_struct *tty)
{
struct raw3215_info *raw = tty->driver_data;
diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c
index 4456ceb23bd2..ea1e43fd16bc 100644
--- a/drivers/s390/char/sclp_tty.c
+++ b/drivers/s390/char/sclp_tty.c
@@ -86,12 +86,12 @@ sclp_tty_close(struct tty_struct *tty, struct file *filp)
* a string of newlines. Every newline creates a new message which
* needs 82 bytes.
*/
-static int
+static unsigned int
sclp_tty_write_room (struct tty_struct *tty)
{
unsigned long flags;
struct list_head *l;
- int count;
+ unsigned int count;
spin_lock_irqsave(&sclp_tty_lock, flags);
count = 0;
diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c
index 7f4445b0f819..b621adee35f0 100644
--- a/drivers/s390/char/sclp_vt220.c
+++ b/drivers/s390/char/sclp_vt220.c
@@ -609,12 +609,12 @@ sclp_vt220_flush_chars(struct tty_struct *tty)
* to change as output buffers get emptied, or if the output flow
* control is acted.
*/
-static int
+static unsigned int
sclp_vt220_write_room(struct tty_struct *tty)
{
unsigned long flags;
struct list_head *l;
- int count;
+ unsigned int count;
spin_lock_irqsave(&sclp_vt220_lock, flags);
count = 0;
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index 1b68564799fa..82d4c961ed06 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -1071,7 +1071,7 @@ static void tty3270_cleanup(struct tty_struct *tty)
/*
* We always have room.
*/
-static int
+static unsigned int
tty3270_write_room(struct tty_struct *tty)
{
return INT_MAX;
diff --git a/drivers/staging/fwserial/fwserial.c b/drivers/staging/fwserial/fwserial.c
index 4245532d2fe0..a151cd76d24e 100644
--- a/drivers/staging/fwserial/fwserial.c
+++ b/drivers/staging/fwserial/fwserial.c
@@ -1113,16 +1113,16 @@ static int fwtty_write(struct tty_struct *tty, const unsigned char *buf, int c)
return (n < 0) ? 0 : n;
}
-static int fwtty_write_room(struct tty_struct *tty)
+static unsigned int fwtty_write_room(struct tty_struct *tty)
{
struct fwtty_port *port = tty->driver_data;
- int n;
+ unsigned int n;
spin_lock_bh(&port->lock);
n = dma_fifo_avail(&port->tx_fifo);
spin_unlock_bh(&port->lock);
- fwtty_dbg(port, "%d\n", n);
+ fwtty_dbg(port, "%u\n", n);
return n;
}
diff --git a/drivers/staging/gdm724x/gdm_tty.c b/drivers/staging/gdm724x/gdm_tty.c
index 0ccc8c24e754..279de2cd9c4a 100644
--- a/drivers/staging/gdm724x/gdm_tty.c
+++ b/drivers/staging/gdm724x/gdm_tty.c
@@ -183,7 +183,7 @@ static int gdm_tty_write(struct tty_struct *tty, const unsigned char *buf,
return len;
}
-static int gdm_tty_write_room(struct tty_struct *tty)
+static unsigned int gdm_tty_write_room(struct tty_struct *tty)
{
struct gdm *gdm = tty->driver_data;
diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c
index b1e63f7798b0..529eccb99b6c 100644
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -440,7 +440,7 @@ static int gb_tty_write(struct tty_struct *tty, const unsigned char *buf,
return count;
}
-static int gb_tty_write_room(struct tty_struct *tty)
+static unsigned int gb_tty_write_room(struct tty_struct *tty)
{
struct gb_tty *gb_tty = tty->driver_data;
unsigned long flags;
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index a4b8876091d2..ee1f4d72cd5e 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -827,7 +827,7 @@ static int rs_write(struct tty_struct * tty, const unsigned char *buf, int count
return ret;
}
-static int rs_write_room(struct tty_struct *tty)
+static unsigned int rs_write_room(struct tty_struct *tty)
{
struct serial_state *info = tty->driver_data;
diff --git a/drivers/tty/ehv_bytechan.c b/drivers/tty/ehv_bytechan.c
index 3c6dd06ec5fb..445e5ff9b36d 100644
--- a/drivers/tty/ehv_bytechan.c
+++ b/drivers/tty/ehv_bytechan.c
@@ -536,11 +536,11 @@ static void ehv_bc_tty_close(struct tty_struct *ttys, struct file *filp)
* how much write room the driver can guarantee will be sent OR BUFFERED. This
* driver MUST honor the return value.
*/
-static int ehv_bc_tty_write_room(struct tty_struct *ttys)
+static unsigned int ehv_bc_tty_write_room(struct tty_struct *ttys)
{
struct ehv_bc_data *bc = ttys->driver_data;
unsigned long flags;
- int count;
+ unsigned int count;
spin_lock_irqsave(&bc->lock, flags);
count = CIRC_SPACE(bc->head, bc->tail, BUF_SIZE);
diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c
index cd23a4b05c8f..e4f9a60dcc18 100644
--- a/drivers/tty/goldfish.c
+++ b/drivers/tty/goldfish.c
@@ -193,7 +193,7 @@ static int goldfish_tty_write(struct tty_struct *tty, const unsigned char *buf,
return count;
}
-static int goldfish_tty_write_room(struct tty_struct *tty)
+static unsigned int goldfish_tty_write_room(struct tty_struct *tty)
{
return 0x10000;
}
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index cdcc64ea2554..a3725eb69cd3 100644
--- a/drivers/tty/hvc/hvc_console.c
+++ b/drivers/tty/hvc/hvc_console.c
@@ -586,7 +586,7 @@ static void hvc_set_winsz(struct work_struct *work)
* how much write room the driver can guarantee will be sent OR BUFFERED. This
* driver MUST honor the return value.
*/
-static int hvc_write_room(struct tty_struct *tty)
+static unsigned int hvc_write_room(struct tty_struct *tty)
{
struct hvc_struct *hp = tty->driver_data;
diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c
index 197988c55e0c..f43f2f94d8bd 100644
--- a/drivers/tty/hvc/hvcs.c
+++ b/drivers/tty/hvc/hvcs.c
@@ -1376,7 +1376,7 @@ static int hvcs_write(struct tty_struct *tty,
* absolutely WILL BUFFER if we can't send it. This driver MUST honor the
* return value, hence the reason for hvcs_struct buffering.
*/
-static int hvcs_write_room(struct tty_struct *tty)
+static unsigned int hvcs_write_room(struct tty_struct *tty)
{
struct hvcs_struct *hvcsd = tty->driver_data;
diff --git a/drivers/tty/hvc/hvsi.c b/drivers/tty/hvc/hvsi.c
index e8c58f9bd263..0a56f44e6b12 100644
--- a/drivers/tty/hvc/hvsi.c
+++ b/drivers/tty/hvc/hvsi.c
@@ -890,7 +890,7 @@ static void hvsi_write_worker(struct work_struct *work)
spin_unlock_irqrestore(&hp->lock, flags);
}
-static int hvsi_write_room(struct tty_struct *tty)
+static unsigned int hvsi_write_room(struct tty_struct *tty)
{
struct hvsi_struct *hp = tty->driver_data;
@@ -929,7 +929,7 @@ static int hvsi_write(struct tty_struct *tty,
* will see there is no room in outbuf and return.
*/
while ((count > 0) && (hvsi_write_room(tty) > 0)) {
- int chunksize = min(count, hvsi_write_room(tty));
+ int chunksize = min_t(int, count, hvsi_write_room(tty));
BUG_ON(hp->n_outbuf < 0);
memcpy(hp->outbuf + hp->n_outbuf, source, chunksize);
diff --git a/drivers/tty/ipwireless/tty.c b/drivers/tty/ipwireless/tty.c
index 99bb2f149ff5..ab562838313b 100644
--- a/drivers/tty/ipwireless/tty.c
+++ b/drivers/tty/ipwireless/tty.c
@@ -228,7 +228,7 @@ static int ipw_write(struct tty_struct *linux_tty,
return count;
}
-static int ipw_write_room(struct tty_struct *linux_tty)
+static unsigned int ipw_write_room(struct tty_struct *linux_tty)
{
struct ipw_tty *tty = linux_tty->driver_data;
int room;
diff --git a/drivers/tty/mips_ejtag_fdc.c b/drivers/tty/mips_ejtag_fdc.c
index a8e19b4833bf..f427e8e154d7 100644
--- a/drivers/tty/mips_ejtag_fdc.c
+++ b/drivers/tty/mips_ejtag_fdc.c
@@ -840,11 +840,11 @@ static int mips_ejtag_fdc_tty_write(struct tty_struct *tty,
return total;
}
-static int mips_ejtag_fdc_tty_write_room(struct tty_struct *tty)
+static unsigned int mips_ejtag_fdc_tty_write_room(struct tty_struct *tty)
{
struct mips_ejtag_fdc_tty_port *dport = tty->driver_data;
struct mips_ejtag_fdc_tty *priv = dport->driver;
- int room;
+ unsigned int room;
/* Report the space in the xmit buffer */
spin_lock(&dport->xmit_lock);
diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index 847ad3dac107..e4fe9315de29 100644
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -188,7 +188,7 @@ module_param(ttymajor, int, 0);
static int moxa_open(struct tty_struct *, struct file *);
static void moxa_close(struct tty_struct *, struct file *);
static int moxa_write(struct tty_struct *, const unsigned char *, int);
-static int moxa_write_room(struct tty_struct *);
+static unsigned int moxa_write_room(struct tty_struct *);
static void moxa_flush_buffer(struct tty_struct *);
static int moxa_chars_in_buffer(struct tty_struct *);
static void moxa_set_termios(struct tty_struct *, struct ktermios *);
@@ -218,7 +218,7 @@ static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
static int MoxaPortReadData(struct moxa_port *);
static int MoxaPortTxQueue(struct moxa_port *);
static int MoxaPortRxQueue(struct moxa_port *);
-static int MoxaPortTxFree(struct moxa_port *);
+static unsigned int MoxaPortTxFree(struct moxa_port *);
static void MoxaPortTxDisable(struct moxa_port *);
static void MoxaPortTxEnable(struct moxa_port *);
static int moxa_get_serial_info(struct tty_struct *, struct serial_struct *);
@@ -1217,7 +1217,7 @@ static int moxa_write(struct tty_struct *tty,
return len;
}
-static int moxa_write_room(struct tty_struct *tty)
+static unsigned int moxa_write_room(struct tty_struct *tty)
{
struct moxa_port *ch;
@@ -1992,7 +1992,7 @@ static int MoxaPortTxQueue(struct moxa_port *port)
return (wptr - rptr) & mask;
}
-static int MoxaPortTxFree(struct moxa_port *port)
+static unsigned int MoxaPortTxFree(struct moxa_port *port)
{
void __iomem *ofsAddr = port->tableAddr;
u16 rptr, wptr, mask;
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 85271e109014..5851a45d828c 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -1183,7 +1183,7 @@ static void mxser_flush_chars(struct tty_struct *tty)
spin_unlock_irqrestore(&info->slock, flags);
}
-static int mxser_write_room(struct tty_struct *tty)
+static unsigned int mxser_write_room(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
int ret;
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 157b26ef6259..06f0c6d39620 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -3056,7 +3056,7 @@ static int gsmtty_write(struct tty_struct *tty, const unsigned char *buf,
return sent;
}
-static int gsmtty_write_room(struct tty_struct *tty)
+static unsigned int gsmtty_write_room(struct tty_struct *tty)
{
struct gsm_dlci *dlci = tty->driver_data;
if (dlci->state == DLCI_CLOSED)
diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c
index 9a2d78ace49b..c55475a9a184 100644
--- a/drivers/tty/nozomi.c
+++ b/drivers/tty/nozomi.c
@@ -1636,10 +1636,10 @@ static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
* If the port is unplugged report lots of room and let the bits
* dribble away so we don't block anything.
*/
-static int ntty_write_room(struct tty_struct *tty)
+static unsigned int ntty_write_room(struct tty_struct *tty)
{
struct port *port = tty->driver_data;
- int room = 4096;
+ unsigned int room = 4096;
const struct nozomi *dc = get_dc_by_tty(tty);
if (dc)
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 3e7b5c811f9b..eb8556b19592 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -136,7 +136,7 @@ static int pty_write(struct tty_struct *tty, const unsigned char *buf, int c)
* the other device.
*/
-static int pty_write_room(struct tty_struct *tty)
+static unsigned int pty_write_room(struct tty_struct *tty)
{
if (tty->flow.stopped)
return 0;
diff --git a/drivers/tty/serial/kgdb_nmi.c b/drivers/tty/serial/kgdb_nmi.c
index db059b66438e..b193bbc666d4 100644
--- a/drivers/tty/serial/kgdb_nmi.c
+++ b/drivers/tty/serial/kgdb_nmi.c
@@ -298,7 +298,7 @@ static void kgdb_nmi_tty_hangup(struct tty_struct *tty)
tty_port_hangup(&priv->port);
}
-static int kgdb_nmi_tty_write_room(struct tty_struct *tty)
+static unsigned int kgdb_nmi_tty_write_room(struct tty_struct *tty)
{
/* Actually, we can handle any amount as we use polled writes. */
return 2048;
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 87f7127b57e6..cb46a65a5dd8 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -616,12 +616,12 @@ static int uart_write(struct tty_struct *tty,
return ret;
}
-static int uart_write_room(struct tty_struct *tty)
+static unsigned int uart_write_room(struct tty_struct *tty)
{
struct uart_state *state = tty->driver_data;
struct uart_port *port;
unsigned long flags;
- int ret;
+ unsigned int ret;
port = uart_port_lock(state, flags);
ret = uart_circ_chars_free(&state->xmit);
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index 1555dccc28af..583aa8342112 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -868,15 +868,15 @@ static void wait_until_sent(struct tty_struct *tty, int timeout)
DBGINFO(("%s wait_until_sent exit\n", info->device_name));
}
-static int write_room(struct tty_struct *tty)
+static unsigned int write_room(struct tty_struct *tty)
{
struct slgt_info *info = tty->driver_data;
- int ret;
+ unsigned int ret;
if (sanity_check(info, tty->name, "write_room"))
return 0;
ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE;
- DBGINFO(("%s write_room=%d\n", info->device_name, ret));
+ DBGINFO(("%s write_room=%u\n", info->device_name, ret));
return ret;
}
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index 07c88ccfb17a..d8834784b586 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -73,7 +73,7 @@ EXPORT_SYMBOL(tty_chars_in_buffer);
* returned and data may be lost as there will be no flow control.
*/
-int tty_write_room(struct tty_struct *tty)
+unsigned int tty_write_room(struct tty_struct *tty)
{
if (tty->ops->write_room)
return tty->ops->write_room(tty);
diff --git a/drivers/tty/ttynull.c b/drivers/tty/ttynull.c
index 17f05b7eb6d3..af3311a24917 100644
--- a/drivers/tty/ttynull.c
+++ b/drivers/tty/ttynull.c
@@ -35,7 +35,7 @@ static int ttynull_write(struct tty_struct *tty, const unsigned char *buf,
return count;
}
-static int ttynull_write_room(struct tty_struct *tty)
+static unsigned int ttynull_write_room(struct tty_struct *tty)
{
return 65536;
}
diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c
index 0a3a71e14df4..d82ce3bb82c3 100644
--- a/drivers/tty/vcc.c
+++ b/drivers/tty/vcc.c
@@ -870,10 +870,10 @@ static int vcc_write(struct tty_struct *tty, const unsigned char *buf,
return total_sent ? total_sent : rv;
}
-static int vcc_write_room(struct tty_struct *tty)
+static unsigned int vcc_write_room(struct tty_struct *tty)
{
struct vcc_port *port;
- u64 num;
+ unsigned int num;
port = vcc_get_ne(tty->index);
if (unlikely(!port)) {
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 706f066eb711..96c130714930 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3263,7 +3263,7 @@ static int con_put_char(struct tty_struct *tty, unsigned char ch)
return do_con_write(tty, &ch, 1);
}
-static int con_write_room(struct tty_struct *tty)
+static unsigned int con_write_room(struct tty_struct *tty)
{
if (tty->flow.stopped)
return 0;
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index ca7a61190dd9..76b7fd234238 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -838,7 +838,7 @@ static int acm_tty_write(struct tty_struct *tty,
return count;
}
-static int acm_tty_write_room(struct tty_struct *tty)
+static unsigned int acm_tty_write_room(struct tty_struct *tty)
{
struct acm *acm = tty->driver_data;
/*
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index 1e59204ec7aa..676a920d9d6b 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -774,18 +774,18 @@ static void gs_flush_chars(struct tty_struct *tty)
spin_unlock_irqrestore(&port->port_lock, flags);
}
-static int gs_write_room(struct tty_struct *tty)
+static unsigned int gs_write_room(struct tty_struct *tty)
{
struct gs_port *port = tty->driver_data;
unsigned long flags;
- int room = 0;
+ unsigned int room = 0;
spin_lock_irqsave(&port->port_lock, flags);
if (port->port_usb)
room = kfifo_avail(&port->port_write_buf);
spin_unlock_irqrestore(&port->port_lock, flags);
- pr_vdebug("gs_write_room: (%d,%p) room=%d\n",
+ pr_vdebug("gs_write_room: (%d,%p) room=%u\n",
port->port_num, tty, room);
return room;
diff --git a/drivers/usb/host/xhci-dbgtty.c b/drivers/usb/host/xhci-dbgtty.c
index ae4e4ab638b5..cd3ab35dd689 100644
--- a/drivers/usb/host/xhci-dbgtty.c
+++ b/drivers/usb/host/xhci-dbgtty.c
@@ -240,11 +240,11 @@ static void dbc_tty_flush_chars(struct tty_struct *tty)
spin_unlock_irqrestore(&port->port_lock, flags);
}
-static int dbc_tty_write_room(struct tty_struct *tty)
+static unsigned int dbc_tty_write_room(struct tty_struct *tty)
{
struct dbc_port *port = tty->driver_data;
unsigned long flags;
- int room = 0;
+ unsigned int room;
spin_lock_irqsave(&port->port_lock, flags);
room = kfifo_avail(&port->write_fifo);
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 98b33b1b5357..055096831daf 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -376,7 +376,7 @@ static int serial_write(struct tty_struct *tty, const unsigned char *buf,
return retval;
}
-static int serial_write_room(struct tty_struct *tty)
+static unsigned int serial_write_room(struct tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
diff --git a/include/linux/tty.h b/include/linux/tty.h
index e18a4f1ac39d..d18fc34d3054 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -459,7 +459,7 @@ extern void tty_write_message(struct tty_struct *tty, char *msg);
extern int tty_send_xchar(struct tty_struct *tty, char ch);
extern int tty_put_char(struct tty_struct *tty, unsigned char c);
extern int tty_chars_in_buffer(struct tty_struct *tty);
-extern int tty_write_room(struct tty_struct *tty);
+extern unsigned int tty_write_room(struct tty_struct *tty);
extern void tty_driver_flush_buffer(struct tty_struct *tty);
extern void tty_throttle(struct tty_struct *tty);
extern void tty_unthrottle(struct tty_struct *tty);
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 653fa5af3a22..ea5b15c72764 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -89,7 +89,7 @@
*
* Note: Do not call this function directly, call tty_driver_flush_chars
*
- * int (*write_room)(struct tty_struct *tty);
+ * unsigned int (*write_room)(struct tty_struct *tty);
*
* This routine returns the numbers of characters the tty driver
* will accept for queuing to be written. This number is subject
@@ -256,7 +256,7 @@ struct tty_operations {
const unsigned char *buf, int count);
int (*put_char)(struct tty_struct *tty, unsigned char ch);
void (*flush_chars)(struct tty_struct *tty);
- int (*write_room)(struct tty_struct *tty);
+ unsigned int (*write_room)(struct tty_struct *tty);
int (*chars_in_buffer)(struct tty_struct *tty);
int (*ioctl)(struct tty_struct *tty,
unsigned int cmd, unsigned long arg);
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index a58584949a95..a5e3d957f20f 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -807,7 +807,7 @@ static int rfcomm_tty_write(struct tty_struct *tty, const unsigned char *buf, in
return sent;
}
-static int rfcomm_tty_write_room(struct tty_struct *tty)
+static unsigned int rfcomm_tty_write_room(struct tty_struct *tty)
{
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
int room = 0;
--
2.31.1
next prev parent reply other threads:[~2021-05-05 9:21 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 ` Jiri Slaby [this message]
2021-05-05 9:25 ` [PATCH 22/35] tty: make tty_operations::write_room return uint 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 ` [PATCH 23/35] USB: serial: make usb_serial_driver::write_room " Jiri Slaby
2021-05-19 9:07 ` 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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