diff options
author | Jiri Slaby <jslaby@suse.cz> | 2021-05-05 12:19:15 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-13 18:03:20 +0300 |
commit | 03b3b1a2405ccd71570cd5ec1fe4abd7bb4891cb (patch) | |
tree | 0ae4a17baec05a793d8c64948e17b1adaa1a8999 /drivers | |
parent | 0f29b503bd0b48ec6f14243f3626ac411c879555 (diff) | |
download | linux-03b3b1a2405ccd71570cd5ec1fe4abd7bb4891cb.tar.xz |
tty: make tty_operations::write_room return uint
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>
Acked-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Acked-by: Alex Elder <elder@linaro.org>
Acked-by: Max Filippov <jcmvbkbc@gmail.com> # xtensa
Acked-by: David Sterba <dsterba@suse.com>
Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
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: Chris Zankel <chris@zankel.net>
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: Jiri Kosina <jikos@kernel.org>
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>
Link: https://lore.kernel.org/r/20210505091928.22010-23-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
38 files changed, 59 insertions, 59 deletions
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 @@ cleanup: /* 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 @@ out: } /* 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 @@ out: 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 @@ exit: 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 @@ exit: 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; |