tty: make tty_operations::chars_in_buffer return uint

tty_operations::chars_in_buffer is another hook which is expected to
return values >= 0. So make it explicit by the return type too -- use
unsigned int.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Acked-by: David Sterba <dsterba@suse.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
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: 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: 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/20210505091928.22010-27-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 2b8810b..1594348 100644 (file)
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -60,11 +60,11 @@ unsigned int line_write_room(struct tty_struct *tty)
        return room;
 }
 
-int line_chars_in_buffer(struct tty_struct *tty)
+unsigned int line_chars_in_buffer(struct tty_struct *tty)
 {
        struct line *line = tty->driver_data;
        unsigned long flags;
-       int ret;
+       unsigned int ret;
 
        spin_lock_irqsave(&line->lock, flags);
        /* write_room subtracts 1 for the needed NULL, so we readd it.*/

diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h
index 861edf3..3325e2b 100644 (file)
--- a/arch/um/drivers/line.h
+++ b/arch/um/drivers/line.h
@@ -67,7 +67,7 @@ extern int line_setup(char **conf, unsigned nlines, char **def,
 extern int line_write(struct tty_struct *tty, const unsigned char *buf,
                      int len);
 extern void line_set_termios(struct tty_struct *tty, struct ktermios * old);
-extern int line_chars_in_buffer(struct tty_struct *tty);
+extern unsigned 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 unsigned int line_write_room(struct tty_struct *tty);

diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index e4b2c68..9f7420b 100644 (file)
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -1637,10 +1637,10 @@ static unsigned int mgslpc_write_room(struct tty_struct *tty)
 
 /* Return the count of bytes in transmit buffer
  */
-static int mgslpc_chars_in_buffer(struct tty_struct *tty)
+static unsigned int mgslpc_chars_in_buffer(struct tty_struct *tty)
 {
        MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-       int rc;
+       unsigned int rc;
 
        if (debug_level >= DEBUG_LEVEL_INFO)
                printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
@@ -1655,7 +1655,7 @@ static int mgslpc_chars_in_buffer(struct tty_struct *tty)
                rc = info->tx_count;
 
        if (debug_level >= DEBUG_LEVEL_INFO)
-               printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
+               printk("%s(%d):mgslpc_chars_in_buffer(%s)=%u\n",
                         __FILE__, __LINE__, info->device_name, rc);
 
        return rc;

diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index ea0f1ae..0a3b89c 100644 (file)
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -467,7 +467,7 @@ static unsigned int ipoctal_write_room(struct tty_struct *tty)
        return PAGE_SIZE - channel->nb_bytes;
 }
 
-static int ipoctal_chars_in_buffer(struct tty_struct *tty)
+static unsigned int ipoctal_chars_in_buffer(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 c50c454..dae8019 100644 (file)
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -1186,7 +1186,7 @@ static unsigned int capinc_tty_write_room(struct tty_struct *tty)
        return room;
 }
 
-static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
+static unsigned int capinc_tty_chars_in_buffer(struct tty_struct *tty)
 {
        struct capiminor *mp = tty->driver_data;
 

diff --git a/drivers/mmc/core/sdio_uart.c b/drivers/mmc/core/sdio_uart.c
index c8f4eca..c36242b 100644 (file)
--- a/drivers/mmc/core/sdio_uart.c
+++ b/drivers/mmc/core/sdio_uart.c
@@ -803,7 +803,7 @@ static unsigned int sdio_uart_write_room(struct tty_struct *tty)
        return FIFO_SIZE - kfifo_len(&port->xmit_fifo);
 }
 
-static int sdio_uart_chars_in_buffer(struct tty_struct *tty)
+static unsigned int sdio_uart_chars_in_buffer(struct tty_struct *tty)
 {
        struct sdio_uart_port *port = tty->driver_data;
        return kfifo_len(&port->xmit_fifo);

diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index bb8bb85..c7563ed 100644 (file)
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -1404,11 +1404,11 @@ static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
 }
 
 /* how many characters in the buffer */
-static int hso_serial_chars_in_buffer(struct tty_struct *tty)
+static unsigned int hso_serial_chars_in_buffer(struct tty_struct *tty)
 {
        struct hso_serial *serial = tty->driver_data;
-       int chars;
        unsigned long flags;
+       unsigned int chars;
 
        /* sanity check */
        if (serial == NULL)

diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index c9fd4a0..8821927 100644 (file)
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -980,7 +980,7 @@ static void tty3215_flush_chars(struct tty_struct *tty)
 /*
  * Returns the number of characters in the output buffer
  */
-static int tty3215_chars_in_buffer(struct tty_struct *tty)
+static unsigned int tty3215_chars_in_buffer(struct tty_struct *tty)
 {
        struct raw3215_info *raw = tty->driver_data;
 

diff --git a/drivers/s390/char/sclp_rw.c b/drivers/s390/char/sclp_rw.c
index d6c84e3..5a1bf6e 100644 (file)
--- a/drivers/s390/char/sclp_rw.c
+++ b/drivers/s390/char/sclp_rw.c
@@ -325,10 +325,10 @@ sclp_buffer_space(struct sclp_buffer *buffer)
 /*
  * Return number of characters in buffer
  */
-int
+unsigned int
 sclp_chars_in_buffer(struct sclp_buffer *buffer)
 {
-       int count;
+       unsigned int count;
 
        count = buffer->char_sum;
        if (buffer->current_line != NULL)

diff --git a/drivers/s390/char/sclp_rw.h b/drivers/s390/char/sclp_rw.h
index 93d706e..b4506be 100644 (file)
--- a/drivers/s390/char/sclp_rw.h
+++ b/drivers/s390/char/sclp_rw.h
@@ -86,7 +86,7 @@ void *sclp_unmake_buffer(struct sclp_buffer *);
 int sclp_buffer_space(struct sclp_buffer *);
 int sclp_write(struct sclp_buffer *buffer, const unsigned char *, int);
 int sclp_emit_buffer(struct sclp_buffer *,void (*)(struct sclp_buffer *,int));
-int sclp_chars_in_buffer(struct sclp_buffer *);
+unsigned int sclp_chars_in_buffer(struct sclp_buffer *);
 
 #ifdef CONFIG_SCLP_CONSOLE
 void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event);

diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c
index ea1e43f..162127f 100644 (file)
--- a/drivers/s390/char/sclp_tty.c
+++ b/drivers/s390/char/sclp_tty.c
@@ -280,16 +280,15 @@ sclp_tty_flush_chars(struct tty_struct *tty)
  * characters in the write buffer (will not be written as long as there is a
  * final line feed missing).
  */
-static int
+static unsigned int
 sclp_tty_chars_in_buffer(struct tty_struct *tty)
 {
        unsigned long flags;
        struct list_head *l;
        struct sclp_buffer *t;
-       int count;
+       unsigned int count = 0;
 
        spin_lock_irqsave(&sclp_tty_lock, flags);
-       count = 0;
        if (sclp_ttybuf != NULL)
                count = sclp_chars_in_buffer(sclp_ttybuf);
        list_for_each(l, &sclp_tty_outqueue) {

diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c
index b621ade..24eb3a0 100644 (file)
--- a/drivers/s390/char/sclp_vt220.c
+++ b/drivers/s390/char/sclp_vt220.c
@@ -629,16 +629,15 @@ sclp_vt220_write_room(struct tty_struct *tty)
 /*
  * Return number of buffered chars.
  */
-static int
+static unsigned int
 sclp_vt220_chars_in_buffer(struct tty_struct *tty)
 {
        unsigned long flags;
        struct list_head *l;
        struct sclp_vt220_request *r;
-       int count;
+       unsigned int count = 0;
 
        spin_lock_irqsave(&sclp_vt220_lock, flags);
-       count = 0;
        if (sclp_vt220_current_request != NULL)
                count = sclp_vt220_chars_stored(sclp_vt220_current_request);
        list_for_each(l, &sclp_vt220_outqueue) {

diff --git a/drivers/staging/fwserial/fwserial.c b/drivers/staging/fwserial/fwserial.c
index a151cd7..d2b286e 100644 (file)
--- a/drivers/staging/fwserial/fwserial.c
+++ b/drivers/staging/fwserial/fwserial.c
@@ -1127,16 +1127,16 @@ static unsigned int fwtty_write_room(struct tty_struct *tty)
        return n;
 }
 
-static int fwtty_chars_in_buffer(struct tty_struct *tty)
+static unsigned int fwtty_chars_in_buffer(struct tty_struct *tty)
 {
        struct fwtty_port *port = tty->driver_data;
-       int n;
+       unsigned int n;
 
        spin_lock_bh(&port->lock);
        n = dma_fifo_level(&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/greybus/uart.c b/drivers/staging/greybus/uart.c
index 529eccb..ccfaa0f 100644 (file)
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -457,11 +457,11 @@ static unsigned int gb_tty_write_room(struct tty_struct *tty)
        return room;
 }
 
-static int gb_tty_chars_in_buffer(struct tty_struct *tty)
+static unsigned int gb_tty_chars_in_buffer(struct tty_struct *tty)
 {
        struct gb_tty *gb_tty = tty->driver_data;
        unsigned long flags;
-       int chars;
+       unsigned int chars;
 
        spin_lock_irqsave(&gb_tty->write_lock, flags);
        chars = kfifo_len(&gb_tty->write_fifo);

diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index ee1f4d7..5ec19c4 100644 (file)
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -834,7 +834,7 @@ static unsigned int rs_write_room(struct tty_struct *tty)
        return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
 }
 
-static int rs_chars_in_buffer(struct tty_struct *tty)
+static unsigned int rs_chars_in_buffer(struct tty_struct *tty)
 {
        struct serial_state *info = tty->driver_data;
 

diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c
index e4f9a60..ccb683a 100644 (file)
--- a/drivers/tty/goldfish.c
+++ b/drivers/tty/goldfish.c
@@ -198,7 +198,7 @@ static unsigned int goldfish_tty_write_room(struct tty_struct *tty)
        return 0x10000;
 }
 
-static int goldfish_tty_chars_in_buffer(struct tty_struct *tty)
+static unsigned int goldfish_tty_chars_in_buffer(struct tty_struct *tty)
 {
        struct goldfish_tty *qtty = &goldfish_ttys[tty->index];
        void __iomem *base = qtty->base;

diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index a3725eb..d0f0253 100644 (file)
--- a/drivers/tty/hvc/hvc_console.c
+++ b/drivers/tty/hvc/hvc_console.c
@@ -596,7 +596,7 @@ static unsigned int hvc_write_room(struct tty_struct *tty)
        return hp->outbuf_size - hp->n_outbuf;
 }
 
-static int hvc_chars_in_buffer(struct tty_struct *tty)
+static unsigned int hvc_chars_in_buffer(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 f43f2f9..fe5e6b4 100644 (file)
--- a/drivers/tty/hvc/hvcs.c
+++ b/drivers/tty/hvc/hvcs.c
@@ -1386,7 +1386,7 @@ static unsigned int hvcs_write_room(struct tty_struct *tty)
        return HVCS_BUFF_LEN - hvcsd->chars_in_buffer;
 }
 
-static int hvcs_chars_in_buffer(struct tty_struct *tty)
+static unsigned int hvcs_chars_in_buffer(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 0a56f44..bfc1527 100644 (file)
--- a/drivers/tty/hvc/hvsi.c
+++ b/drivers/tty/hvc/hvsi.c
@@ -897,7 +897,7 @@ static unsigned int hvsi_write_room(struct tty_struct *tty)
        return N_OUTBUF - hp->n_outbuf;
 }
 
-static int hvsi_chars_in_buffer(struct tty_struct *tty)
+static unsigned int hvsi_chars_in_buffer(struct tty_struct *tty)
 {
        struct hvsi_struct *hp = tty->driver_data;
 

diff --git a/drivers/tty/ipwireless/tty.c b/drivers/tty/ipwireless/tty.c
index ab56283..e01ca68 100644 (file)
--- a/drivers/tty/ipwireless/tty.c
+++ b/drivers/tty/ipwireless/tty.c
@@ -270,7 +270,7 @@ static int ipwireless_set_serial_info(struct tty_struct *linux_tty,
        return 0;       /* Keeps the PCMCIA scripts happy. */
 }
 
-static int ipw_chars_in_buffer(struct tty_struct *linux_tty)
+static unsigned int ipw_chars_in_buffer(struct tty_struct *linux_tty)
 {
        struct ipw_tty *tty = linux_tty->driver_data;
 

diff --git a/drivers/tty/mips_ejtag_fdc.c b/drivers/tty/mips_ejtag_fdc.c
index f427e8e..3b5915b 100644 (file)
--- a/drivers/tty/mips_ejtag_fdc.c
+++ b/drivers/tty/mips_ejtag_fdc.c
@@ -854,10 +854,10 @@ static unsigned int mips_ejtag_fdc_tty_write_room(struct tty_struct *tty)
        return room;
 }
 
-static int mips_ejtag_fdc_tty_chars_in_buffer(struct tty_struct *tty)
+static unsigned int mips_ejtag_fdc_tty_chars_in_buffer(struct tty_struct *tty)
 {
        struct mips_ejtag_fdc_tty_port *dport = tty->driver_data;
-       int chars;
+       unsigned int chars;
 
        /* Report the number of bytes in the xmit buffer */
        spin_lock(&dport->xmit_lock);

diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index e4fe931..64b1817 100644 (file)
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -190,7 +190,7 @@ static void moxa_close(struct tty_struct *, struct file *);
 static int moxa_write(struct tty_struct *, const unsigned char *, int);
 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 unsigned int moxa_chars_in_buffer(struct tty_struct *);
 static void moxa_set_termios(struct tty_struct *, struct ktermios *);
 static void moxa_stop(struct tty_struct *);
 static void moxa_start(struct tty_struct *);
@@ -216,7 +216,7 @@ static int MoxaPortLineStatus(struct moxa_port *);
 static void MoxaPortFlushData(struct moxa_port *, int);
 static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
 static int MoxaPortReadData(struct moxa_port *);
-static int MoxaPortTxQueue(struct moxa_port *);
+static unsigned int MoxaPortTxQueue(struct moxa_port *);
 static int MoxaPortRxQueue(struct moxa_port *);
 static unsigned int MoxaPortTxFree(struct moxa_port *);
 static void MoxaPortTxDisable(struct moxa_port *);
@@ -1239,10 +1239,10 @@ static void moxa_flush_buffer(struct tty_struct *tty)
        tty_wakeup(tty);
 }
 
-static int moxa_chars_in_buffer(struct tty_struct *tty)
+static unsigned int moxa_chars_in_buffer(struct tty_struct *tty)
 {
        struct moxa_port *ch = tty->driver_data;
-       int chars;
+       unsigned int chars;
 
        chars = MoxaPortTxQueue(ch);
        if (chars)
@@ -1981,7 +1981,7 @@ static int MoxaPortReadData(struct moxa_port *port)
 }
 
 
-static int MoxaPortTxQueue(struct moxa_port *port)
+static unsigned int MoxaPortTxQueue(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 5851a45..a74e614 100644 (file)
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -1192,7 +1192,7 @@ static unsigned int mxser_write_room(struct tty_struct *tty)
        return ret < 0 ? 0 : ret;
 }
 
-static int mxser_chars_in_buffer(struct tty_struct *tty)
+static unsigned int mxser_chars_in_buffer(struct tty_struct *tty)
 {
        struct mxser_port *info = tty->driver_data;
        return info->xmit_cnt;

diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 06f0c6d..bd24dc0 100644 (file)
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -3064,7 +3064,7 @@ static unsigned int gsmtty_write_room(struct tty_struct *tty)
        return TX_SIZE - kfifo_len(&dlci->fifo);
 }
 
-static int gsmtty_chars_in_buffer(struct tty_struct *tty)
+static unsigned int gsmtty_chars_in_buffer(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 c55475a..62c1673 100644 (file)
--- a/drivers/tty/nozomi.c
+++ b/drivers/tty/nozomi.c
@@ -1776,7 +1776,7 @@ static void ntty_throttle(struct tty_struct *tty)
 }
 
 /* Returns number of chars in buffer, called by tty layer */
-static s32 ntty_chars_in_buffer(struct tty_struct *tty)
+static unsigned int ntty_chars_in_buffer(struct tty_struct *tty)
 {
        struct port *port = tty->driver_data;
        struct nozomi *dc = get_dc_by_tty(tty);

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index cb46a65..d29329e 100644 (file)
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -629,12 +629,12 @@ static unsigned int uart_write_room(struct tty_struct *tty)
        return ret;
 }
 
-static int uart_chars_in_buffer(struct tty_struct *tty)
+static unsigned int uart_chars_in_buffer(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_pending(&state->xmit);

diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index 583aa83..cf87dc6 100644 (file)
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -1254,14 +1254,14 @@ static int synclink_gt_proc_show(struct seq_file *m, void *v)
 /*
  * return count of bytes in transmit buffer
  */
-static int chars_in_buffer(struct tty_struct *tty)
+static unsigned int chars_in_buffer(struct tty_struct *tty)
 {
        struct slgt_info *info = tty->driver_data;
-       int count;
+       unsigned int count;
        if (sanity_check(info, tty->name, "chars_in_buffer"))
                return 0;
        count = tbuf_bytes(info);
-       DBGINFO(("%s chars_in_buffer()=%d\n", info->device_name, count));
+       DBGINFO(("%s chars_in_buffer()=%u\n", info->device_name, count));
        return count;
 }
 

diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index d883478..aa9ecc8 100644 (file)
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -54,7 +54,7 @@
  *     to be no queue on the device.
  */
 
-int tty_chars_in_buffer(struct tty_struct *tty)
+unsigned int tty_chars_in_buffer(struct tty_struct *tty)
 {
        if (tty->ops->chars_in_buffer)
                return tty->ops->chars_in_buffer(tty);

diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c
index d82ce3b..e883b8f 100644 (file)
--- a/drivers/tty/vcc.c
+++ b/drivers/tty/vcc.c
@@ -888,10 +888,10 @@ static unsigned int vcc_write_room(struct tty_struct *tty)
        return num;
 }
 
-static int vcc_chars_in_buffer(struct tty_struct *tty)
+static unsigned int vcc_chars_in_buffer(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/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 76b7fd2..81199ef 100644 (file)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -848,7 +848,7 @@ static unsigned int acm_tty_write_room(struct tty_struct *tty)
        return acm_wb_is_avail(acm) ? acm->writesize : 0;
 }
 
-static int acm_tty_chars_in_buffer(struct tty_struct *tty)
+static unsigned int acm_tty_chars_in_buffer(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 676a920..bffef8e 100644 (file)
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -791,17 +791,17 @@ static unsigned int gs_write_room(struct tty_struct *tty)
        return room;
 }
 
-static int gs_chars_in_buffer(struct tty_struct *tty)
+static unsigned int gs_chars_in_buffer(struct tty_struct *tty)
 {
        struct gs_port  *port = tty->driver_data;
        unsigned long   flags;
-       int             chars = 0;
+       unsigned int    chars;
 
        spin_lock_irqsave(&port->port_lock, flags);
        chars = kfifo_len(&port->port_write_buf);
        spin_unlock_irqrestore(&port->port_lock, flags);
 
-       pr_vdebug("gs_chars_in_buffer: (%d,%p) chars=%d\n",
+       pr_vdebug("gs_chars_in_buffer: (%d,%p) chars=%u\n",
                port->port_num, tty, chars);
 
        return chars;

diff --git a/drivers/usb/host/xhci-dbgtty.c b/drivers/usb/host/xhci-dbgtty.c
index cd3ab35..bef1045 100644 (file)
--- a/drivers/usb/host/xhci-dbgtty.c
+++ b/drivers/usb/host/xhci-dbgtty.c
@@ -253,11 +253,11 @@ static unsigned int dbc_tty_write_room(struct tty_struct *tty)
        return room;
 }
 
-static int dbc_tty_chars_in_buffer(struct tty_struct *tty)
+static unsigned int dbc_tty_chars_in_buffer(struct tty_struct *tty)
 {
        struct dbc_port         *port = tty->driver_data;
        unsigned long           flags;
-       int                     chars = 0;
+       unsigned int            chars;
 
        spin_lock_irqsave(&port->port_lock, flags);
        chars = kfifo_len(&port->write_fifo);

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 0550968..eeb441c 100644 (file)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -385,7 +385,7 @@ static unsigned int serial_write_room(struct tty_struct *tty)
        return port->serial->type->write_room(tty);
 }
 
-static int serial_chars_in_buffer(struct tty_struct *tty)
+static unsigned int serial_chars_in_buffer(struct tty_struct *tty)
 {
        struct usb_serial_port *port = tty->driver_data;
        struct usb_serial *serial = port->serial;

diff --git a/include/linux/tty.h b/include/linux/tty.h
index d18fc34..5cf6b2e 100644 (file)
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -458,7 +458,7 @@ extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
 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 unsigned int tty_chars_in_buffer(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);

diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index ea5b15c..a4694bb 100644 (file)
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -257,7 +257,7 @@ struct tty_operations {
        int  (*put_char)(struct tty_struct *tty, unsigned char ch);
        void (*flush_chars)(struct tty_struct *tty);
        unsigned int (*write_room)(struct tty_struct *tty);
-       int  (*chars_in_buffer)(struct tty_struct *tty);
+       unsigned int (*chars_in_buffer)(struct tty_struct *tty);
        int  (*ioctl)(struct tty_struct *tty,
                    unsigned int cmd, unsigned long arg);
        long (*compat_ioctl)(struct tty_struct *tty,

diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index a5e3d95..c76dcc0 100644 (file)
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -1010,7 +1010,7 @@ static void rfcomm_tty_unthrottle(struct tty_struct *tty)
        rfcomm_dlc_unthrottle(dev->dlc);
 }
 
-static int rfcomm_tty_chars_in_buffer(struct tty_struct *tty)
+static unsigned int rfcomm_tty_chars_in_buffer(struct tty_struct *tty)
 {
        struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;