tty: make tty_ldisc_ops::*buf*() hooks operate on size_t

Count passed to tty_ldisc_ops::receive_buf*(), ::lookahead_buf(), and
returned from ::receive_buf2() is expected to be size_t. So set it to
size_t to unify with the rest of the code.

Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Cc: William Hubbs <w.d.hubbs@gmail.com>
Cc: Chris Brannon <chris@the-brannons.com>
Cc: Kirk Reiser <kirk@reisers.ca>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Cc: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Max Staudt <max@enpas.org>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Cc: Andreas Koensgen <ajk@comnets.uni-bremen.de>
Cc: Jeremy Kerr <jk@codeconstruct.com.au>
Cc: Matt Johnston <matt@codeconstruct.com.au>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230810091510.13006-16-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/accessibility/speakup/spk_ttyio.c b/drivers/accessibility/speakup/spk_ttyio.c
index 5d4bafe..736f622 100644 (file)
--- a/drivers/accessibility/speakup/spk_ttyio.c
+++ b/drivers/accessibility/speakup/spk_ttyio.c
@@ -71,9 +71,9 @@ static void spk_ttyio_ldisc_close(struct tty_struct *tty)
        kfree(tty->disc_data);
 }
 
-static int spk_ttyio_receive_buf2(struct tty_struct *tty,
-                                 const unsigned char *cp,
-                                 const char *fp, int count)
+static size_t spk_ttyio_receive_buf2(struct tty_struct *tty,
+                                    const unsigned char *cp, const char *fp,
+                                    size_t count)
 {
        struct spk_ldisc_data *ldisc_data = tty->disc_data;
        struct spk_synth *synth = ldisc_data->synth;

diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 5224b09..32bef61 100644 (file)
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -599,7 +599,7 @@ static void hci_uart_tty_wakeup(struct tty_struct *tty)
  * Return Value:    None
  */
 static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data,
-                                const char *flags, int count)
+                                const char *flags, size_t count)
 {
        struct hci_uart *hu = tty->disc_data;
 

diff --git a/drivers/input/serio/serport.c b/drivers/input/serio/serport.c
index a5d8953..7fc6155 100644 (file)
--- a/drivers/input/serio/serport.c
+++ b/drivers/input/serio/serport.c
@@ -115,7 +115,8 @@ static void serport_ldisc_close(struct tty_struct *tty)
  */
 
 static void serport_ldisc_receive(struct tty_struct *tty,
-               const unsigned char *cp, const char *fp, int count)
+                                 const unsigned char *cp, const char *fp,
+                                 size_t count)
 {
        struct serport *serport = tty->disc_data;
        unsigned long flags;

diff --git a/drivers/misc/ti-st/st_core.c b/drivers/misc/ti-st/st_core.c
index 3b21457..c89024a 100644 (file)
--- a/drivers/misc/ti-st/st_core.c
+++ b/drivers/misc/ti-st/st_core.c
@@ -792,7 +792,7 @@ static void st_tty_close(struct tty_struct *tty)
 }
 
 static void st_tty_receive(struct tty_struct *tty, const unsigned char *data,
-                          const char *tty_flags, int count)
+                          const char *tty_flags, size_t count)
 {
 #ifdef VERBOSE
        print_hex_dump(KERN_DEBUG, ">in>", DUMP_PREFIX_NONE,

diff --git a/drivers/net/caif/caif_serial.c b/drivers/net/caif/caif_serial.c
index 6880758..feda04d 100644 (file)
--- a/drivers/net/caif/caif_serial.c
+++ b/drivers/net/caif/caif_serial.c
@@ -159,7 +159,7 @@ static inline void debugfs_tx(struct ser_device *ser, const u8 *data, int size)
 #endif
 
 static void ldisc_receive(struct tty_struct *tty, const u8 *data,
-                       const char *flags, int count)
+                         const char *flags, size_t count)
 {
        struct sk_buff *skb = NULL;
        struct ser_device *ser;

diff --git a/drivers/net/can/can327.c b/drivers/net/can/can327.c
index 4533dc0..4bf970d 100644 (file)
--- a/drivers/net/can/can327.c
+++ b/drivers/net/can/can327.c
@@ -886,7 +886,7 @@ static bool can327_is_valid_rx_char(u8 c)
  * functions may be called in parallel.
  */
 static void can327_ldisc_rx(struct tty_struct *tty, const unsigned char *cp,
-                           const char *fp, int count)
+                           const char *fp, size_t count)
 {
        struct can327 *elm = tty->disc_data;
        size_t first_new_char_idx;
@@ -904,7 +904,7 @@ static void can327_ldisc_rx(struct tty_struct *tty, const unsigned char *cp,
        while (count--) {
                if (elm->rxfill >= CAN327_SIZE_RXBUF) {
                        netdev_err(elm->dev,
-                                  "Receive buffer overflowed. Bad chip or wiring? count = %i",
+                                  "Receive buffer overflowed. Bad chip or wiring? count = %zu",
                                   count);
                        goto uart_failure;
                }

diff --git a/drivers/net/can/slcan/slcan-core.c b/drivers/net/can/slcan/slcan-core.c
index 371af9d..6337156 100644 (file)
--- a/drivers/net/can/slcan/slcan-core.c
+++ b/drivers/net/can/slcan/slcan-core.c
@@ -776,7 +776,7 @@ static const struct net_device_ops slcan_netdev_ops = {
  */
 static void slcan_receive_buf(struct tty_struct *tty,
                              const unsigned char *cp, const char *fp,
-                             int count)
+                             size_t count)
 {
        struct slcan *sl = tty->disc_data;
 

diff --git a/drivers/net/hamradio/6pack.c b/drivers/net/hamradio/6pack.c
index 9fb5675..2089efb 100644 (file)
--- a/drivers/net/hamradio/6pack.c
+++ b/drivers/net/hamradio/6pack.c
@@ -428,7 +428,7 @@ out:
  * and sent on to some IP layer for further processing.
  */
 static void sixpack_receive_buf(struct tty_struct *tty,
-       const unsigned char *cp, const char *fp, int count)
+       const unsigned char *cp, const char *fp, size_t count)
 {
        struct sixpack *sp;
        int count1;

diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index c251e04..1efab60 100644 (file)
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -875,7 +875,7 @@ static int mkiss_ioctl(struct tty_struct *tty, unsigned int cmd,
  * and sent on to the AX.25 layer for further processing.
  */
 static void mkiss_receive_buf(struct tty_struct *tty, const unsigned char *cp,
-       const char *fp, int count)
+                             const char *fp, size_t count)
 {
        struct mkiss *ax = mkiss_get(tty);
 

diff --git a/drivers/net/mctp/mctp-serial.c b/drivers/net/mctp/mctp-serial.c
index 9f9eaf8..6761f4f 100644 (file)
--- a/drivers/net/mctp/mctp-serial.c
+++ b/drivers/net/mctp/mctp-serial.c
@@ -392,7 +392,7 @@ static void mctp_serial_push(struct mctp_serial *dev, unsigned char c)
 
 static void mctp_serial_tty_receive_buf(struct tty_struct *tty,
                                        const unsigned char *c,
-                                       const char *f, int len)
+                                       const char *f, size_t len)
 {
        struct mctp_serial *dev = tty->disc_data;
        int i;

diff --git a/drivers/net/ppp/ppp_async.c b/drivers/net/ppp/ppp_async.c
index f420bdd..79b8fca 100644 (file)
--- a/drivers/net/ppp/ppp_async.c
+++ b/drivers/net/ppp/ppp_async.c
@@ -331,7 +331,7 @@ ppp_asynctty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
 /* May sleep, don't call from interrupt level or with interrupts disabled */
 static void
 ppp_asynctty_receive(struct tty_struct *tty, const unsigned char *buf,
-                 const char *cflags, int count)
+                    const char *cflags, size_t count)
 {
        struct asyncppp *ap = ap_get(tty);
        unsigned long flags;

diff --git a/drivers/net/ppp/ppp_synctty.c b/drivers/net/ppp/ppp_synctty.c
index 86dacef..767aca3 100644 (file)
--- a/drivers/net/ppp/ppp_synctty.c
+++ b/drivers/net/ppp/ppp_synctty.c
@@ -324,7 +324,7 @@ ppp_synctty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
 /* May sleep, don't call from interrupt level or with interrupts disabled */
 static void
 ppp_sync_receive(struct tty_struct *tty, const unsigned char *buf,
-                 const char *cflags, int count)
+                const char *cflags, size_t count)
 {
        struct syncppp *ap = sp_get(tty);
        unsigned long flags;

diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c
index 6865d32..39450bf 100644 (file)
--- a/drivers/net/slip/slip.c
+++ b/drivers/net/slip/slip.c
@@ -686,7 +686,7 @@ static void sl_setup(struct net_device *dev)
  */
 
 static void slip_receive_buf(struct tty_struct *tty, const unsigned char *cp,
-               const char *fp, int count)
+                            const char *fp, size_t count)
 {
        struct slip *sl = tty->disc_data;
 

diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index c7a787f..2f85877 100644 (file)
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -3490,7 +3490,7 @@ static void gsmld_detach_gsm(struct tty_struct *tty, struct gsm_mux *gsm)
 }
 
 static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp,
-                             const char *fp, int count)
+                             const char *fp, size_t count)
 {
        struct gsm_mux *gsm = tty->disc_data;
        char flags = TTY_NORMAL;

diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index 46b09bf..ce3c779 100644 (file)
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -370,12 +370,12 @@ static void n_hdlc_tty_wakeup(struct tty_struct *tty)
  * interpreted as one HDLC frame.
  */
 static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
-                              const char *flags, int count)
+                              const char *flags, size_t count)
 {
        register struct n_hdlc *n_hdlc = tty->disc_data;
        register struct n_hdlc_buf *buf;
 
-       pr_debug("%s() called count=%d\n", __func__, count);
+       pr_debug("%s() called count=%zu\n", __func__, count);
 
        if (count > maxframe) {
                pr_debug("rx count>maxframesize, data discarded\n");

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 0043cc8..ee9b20d 100644 (file)
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1480,7 +1480,7 @@ n_tty_receive_char_lnext(struct tty_struct *tty, unsigned char c, char flag)
 
 /* Caller must ensure count > 0 */
 static void n_tty_lookahead_flow_ctrl(struct tty_struct *tty, const unsigned char *cp,
-                                     const unsigned char *fp, unsigned int count)
+                                     const unsigned char *fp, size_t count)
 {
        struct n_tty_data *ldata = tty->disc_data;
        unsigned char flag = TTY_NORMAL;
@@ -1662,12 +1662,13 @@ static void __receive_buf(struct tty_struct *tty, const unsigned char *cp,
  *     claims non-exclusive %termios_rwsem
  *     publishes commit_head or canon_head
  */
-static int
+static size_t
 n_tty_receive_buf_common(struct tty_struct *tty, const unsigned char *cp,
                         const char *fp, int count, int flow)
 {
        struct n_tty_data *ldata = tty->disc_data;
-       int room, n, rcvd = 0, overflow;
+       size_t rcvd = 0;
+       int room, n, overflow;
 
        down_read(&tty->termios_rwsem);
 
@@ -1744,13 +1745,14 @@ n_tty_receive_buf_common(struct tty_struct *tty, const unsigned char *cp,
 }
 
 static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
-                             const char *fp, int count)
+                             const char *fp, size_t count)
 {
        n_tty_receive_buf_common(tty, cp, fp, count, 0);
 }
 
-static int n_tty_receive_buf2(struct tty_struct *tty, const unsigned char *cp,
-                             const char *fp, int count)
+static size_t n_tty_receive_buf2(struct tty_struct *tty,
+                                const unsigned char *cp, const char *fp,
+                                size_t count)
 {
        return n_tty_receive_buf_common(tty, cp, fp, count, 1);
 }

diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h
index 62e0894..f88529e 100644 (file)
--- a/include/linux/tty_ldisc.h
+++ b/include/linux/tty_ldisc.h
@@ -162,7 +162,7 @@ int ldsem_down_write_nested(struct ld_semaphore *sem, int subclass,
  *     Optional. Can sleep.
  *
  * @receive_buf: [DRV] ``void ()(struct tty_struct *tty,
- *                    const unsigned char *cp, const char *fp, int count)``
+ *                    const unsigned char *cp, const char *fp, size_t count)``
  *
  *     This function is called by the low-level tty driver to send characters
  *     received by the hardware to the line discpline for processing. @cp is
@@ -191,8 +191,8 @@ int ldsem_down_write_nested(struct ld_semaphore *sem, int subclass,
  *
  *     Optional.
  *
- * @receive_buf2: [DRV] ``int ()(struct tty_struct *tty,
- *                     const unsigned char *cp, const char *fp, int count)``
+ * @receive_buf2: [DRV] ``ssize_t ()(struct tty_struct *tty,
+ *                     const unsigned char *cp, const char *fp, size_t count)``
  *
  *     This function is called by the low-level tty driver to send characters
  *     received by the hardware to the line discpline for processing. @cp is a
@@ -205,7 +205,7 @@ int ldsem_down_write_nested(struct ld_semaphore *sem, int subclass,
  *     Optional.
  *
  * @lookahead_buf: [DRV] ``void ()(struct tty_struct *tty,
- *                     const unsigned char *cp, const char *fp, int count)``
+ *                     const unsigned char *cp, const char *fp, size_t count)``
  *
  *     This function is called by the low-level tty driver for characters
  *     not eaten by ->receive_buf() or ->receive_buf2(). It is useful for
@@ -256,13 +256,13 @@ struct tty_ldisc_ops {
         * The following routines are called from below.
         */
        void    (*receive_buf)(struct tty_struct *tty, const unsigned char *cp,
-                              const char *fp, int count);
+                              const char *fp, size_t count);
        void    (*write_wakeup)(struct tty_struct *tty);
        void    (*dcd_change)(struct tty_struct *tty, bool active);
-       int     (*receive_buf2)(struct tty_struct *tty, const unsigned char *cp,
-                               const char *fp, int count);
+       size_t  (*receive_buf2)(struct tty_struct *tty, const unsigned char *cp,
+                               const char *fp, size_t count);
        void    (*lookahead_buf)(struct tty_struct *tty, const unsigned char *cp,
-                                const unsigned char *fp, unsigned int count);
+                                const unsigned char *fp, size_t count);
 
        struct  module *owner;
 };

diff --git a/net/nfc/nci/uart.c b/net/nfc/nci/uart.c
index c8249d9..c957ca6 100644 (file)
--- a/net/nfc/nci/uart.c
+++ b/net/nfc/nci/uart.c
@@ -296,7 +296,7 @@ static int nci_uart_default_recv_buf(struct nci_uart *nu, const u8 *data,
  * Return Value:    None
  */
 static void nci_uart_tty_receive(struct tty_struct *tty, const u8 *data,
-                                const char *flags, int count)
+                                const char *flags, size_t count)
 {
        struct nci_uart *nu = tty->disc_data;
 

diff --git a/sound/soc/codecs/cx20442.c b/sound/soc/codecs/cx20442.c
index 43c0cac..42cc863 100644 (file)
--- a/sound/soc/codecs/cx20442.c
+++ b/sound/soc/codecs/cx20442.c
@@ -259,7 +259,7 @@ static void v253_hangup(struct tty_struct *tty)
 
 /* Line discipline .receive_buf() */
 static void v253_receive(struct tty_struct *tty, const unsigned char *cp,
-               const char *fp, int count)
+                        const char *fp, size_t count)
 {
        struct snd_soc_component *component = tty->disc_data;
        struct cx20442_priv *cx20442;