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Message-ID: <20230810091510.13006-16-jirislaby@kernel.org>
Date: Thu, 10 Aug 2023 11:14:49 +0200
From: "Jiri Slaby (SUSE)" <jirislaby@...nel.org>
To: gregkh@...uxfoundation.org
Cc: linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
"Jiri Slaby (SUSE)" <jirislaby@...nel.org>,
William Hubbs <w.d.hubbs@...il.com>,
Chris Brannon <chris@...-brannons.com>,
Kirk Reiser <kirk@...sers.ca>,
Samuel Thibault <samuel.thibault@...-lyon.org>,
Marcel Holtmann <marcel@...tmann.org>,
Johan Hedberg <johan.hedberg@...il.com>,
Luiz Augusto von Dentz <luiz.dentz@...il.com>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
Arnd Bergmann <arnd@...db.de>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, Max Staudt <max@...as.org>,
Wolfgang Grandegger <wg@...ndegger.com>,
Marc Kleine-Budde <mkl@...gutronix.de>,
Dario Binacchi <dario.binacchi@...rulasolutions.com>,
Andreas Koensgen <ajk@...nets.uni-bremen.de>,
Jeremy Kerr <jk@...econstruct.com.au>,
Matt Johnston <matt@...econstruct.com.au>,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Subject: [PATCH 15/36] 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@...nel.org>
Cc: William Hubbs <w.d.hubbs@...il.com>
Cc: Chris Brannon <chris@...-brannons.com>
Cc: Kirk Reiser <kirk@...sers.ca>
Cc: Samuel Thibault <samuel.thibault@...-lyon.org>
Cc: Marcel Holtmann <marcel@...tmann.org>
Cc: Johan Hedberg <johan.hedberg@...il.com>
Cc: Luiz Augusto von Dentz <luiz.dentz@...il.com>
Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Eric Dumazet <edumazet@...gle.com>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Paolo Abeni <pabeni@...hat.com>
Cc: Max Staudt <max@...as.org>
Cc: Wolfgang Grandegger <wg@...ndegger.com>
Cc: Marc Kleine-Budde <mkl@...gutronix.de>
Cc: Dario Binacchi <dario.binacchi@...rulasolutions.com>
Cc: Andreas Koensgen <ajk@...nets.uni-bremen.de>
Cc: Jeremy Kerr <jk@...econstruct.com.au>
Cc: Matt Johnston <matt@...econstruct.com.au>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Liam Girdwood <lgirdwood@...il.com>
Cc: Mark Brown <broonie@...nel.org>
Cc: Jaroslav Kysela <perex@...ex.cz>
Cc: Takashi Iwai <tiwai@...e.com>
---
drivers/accessibility/speakup/spk_ttyio.c | 6 +++---
drivers/bluetooth/hci_ldisc.c | 2 +-
drivers/input/serio/serport.c | 3 ++-
drivers/misc/ti-st/st_core.c | 2 +-
drivers/net/caif/caif_serial.c | 2 +-
drivers/net/can/can327.c | 4 ++--
drivers/net/can/slcan/slcan-core.c | 2 +-
drivers/net/hamradio/6pack.c | 2 +-
drivers/net/hamradio/mkiss.c | 2 +-
drivers/net/mctp/mctp-serial.c | 2 +-
drivers/net/ppp/ppp_async.c | 2 +-
drivers/net/ppp/ppp_synctty.c | 2 +-
drivers/net/slip/slip.c | 2 +-
drivers/tty/n_gsm.c | 2 +-
drivers/tty/n_hdlc.c | 4 ++--
drivers/tty/n_tty.c | 14 ++++++++------
include/linux/tty_ldisc.h | 16 ++++++++--------
net/nfc/nci/uart.c | 2 +-
sound/soc/codecs/cx20442.c | 2 +-
19 files changed, 38 insertions(+), 35 deletions(-)
diff --git a/drivers/accessibility/speakup/spk_ttyio.c b/drivers/accessibility/speakup/spk_ttyio.c
index 5d4bafe118ec..736f622068ce 100644
--- 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 759472686831..3473c4b8751a 100644
--- 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 a5d8953f5904..7fc6155131f8 100644
--- 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 3b2145722bd7..c89024ab3d77 100644
--- 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 688075859ae4..feda04dbe837 100644
--- 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 4533dc00f215..4bf970df7e84 100644
--- 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 371af9d17b14..63371563d8e2 100644
--- 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 9fb567524220..2089efb0d360 100644
--- a/drivers/net/hamradio/6pack.c
+++ b/drivers/net/hamradio/6pack.c
@@ -428,7 +428,7 @@ static void sixpack_write_wakeup(struct tty_struct *tty)
* 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 c251e04ae047..1efab6037c7e 100644
--- 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 9f9eaf896047..6761f4ff2e7c 100644
--- 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 f420bddb6a8c..79b8fca47edb 100644
--- 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 86dacef84c6c..767aca32b315 100644
--- 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 6865d32270e5..39450bf748a5 100644
--- 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 c7a787f10a9c..2f85877b8ba1 100644
--- 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 46b09bfb6f3a..ce3c779f5c03 100644
--- 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 0043cc84b91a..ee9b20dcbce6 100644
--- 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 62e089434995..f88529e6a783 100644
--- 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 c8249d95306d..c957ca6d2f87 100644
--- 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 43c0cac0ec9e..42cc863cbd53 100644
--- 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;
--
2.41.0
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