6.1-stable review patch. If anyone has any objections, please let me know.
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From: "Jiri Slaby (SUSE)" jirislaby@kernel.org
[ Upstream commit 2b5eac0f8c6e79bc152c8804f9f88d16717013ab ]
This code (tty_get -> vhangup -> tty_put) is repeated on few places. Introduce a helper similar to tty_port_tty_hangup() (asynchronous) to handle even vhangup (synchronous).
And use it on those places.
In fact, reuse the tty_port_tty_hangup()'s code and call tty_vhangup() depending on a new bool parameter.
Signed-off-by: "Jiri Slaby (SUSE)" jirislaby@kernel.org Cc: Karsten Keil isdn@linux-pingi.de Cc: David Lin dtwlin@gmail.com Cc: Johan Hovold johan@kernel.org Cc: Alex Elder elder@kernel.org Cc: Oliver Neukum oneukum@suse.com Cc: Marcel Holtmann marcel@holtmann.org Cc: Johan Hedberg johan.hedberg@gmail.com Cc: Luiz Augusto von Dentz luiz.dentz@gmail.com Reviewed-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Link: https://lore.kernel.org/r/20250611100319.186924-2-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Stable-dep-of: 74098cc06e75 ("xhci: dbgtty: fix device unregister: fixup") Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/isdn/capi/capi.c | 8 +------- drivers/staging/greybus/uart.c | 7 +------ drivers/tty/serial/serial_core.c | 7 +------ drivers/tty/tty_port.c | 12 ++++++++---- drivers/usb/class/cdc-acm.c | 7 +------ drivers/usb/serial/usb-serial.c | 7 +------ include/linux/tty_port.h | 12 +++++++++++- net/bluetooth/rfcomm/tty.c | 7 +------ 8 files changed, 25 insertions(+), 42 deletions(-)
--- a/drivers/isdn/capi/capi.c +++ b/drivers/isdn/capi/capi.c @@ -304,15 +304,9 @@ static void capincci_alloc_minor(struct static void capincci_free_minor(struct capincci *np) { struct capiminor *mp = np->minorp; - struct tty_struct *tty;
if (mp) { - tty = tty_port_tty_get(&mp->port); - if (tty) { - tty_vhangup(tty); - tty_kref_put(tty); - } - + tty_port_tty_vhangup(&mp->port); capiminor_free(mp); } } --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -915,7 +915,6 @@ static void gb_uart_remove(struct gbphy_ { struct gb_tty *gb_tty = gb_gbphy_get_data(gbphy_dev); struct gb_connection *connection = gb_tty->connection; - struct tty_struct *tty; int ret;
ret = gbphy_runtime_get_sync(gbphy_dev); @@ -928,11 +927,7 @@ static void gb_uart_remove(struct gbphy_ wake_up_all(&gb_tty->wioctl); mutex_unlock(&gb_tty->mutex);
- tty = tty_port_tty_get(&gb_tty->port); - if (tty) { - tty_vhangup(tty); - tty_kref_put(tty); - } + tty_port_tty_vhangup(&gb_tty->port);
gb_connection_disable_rx(connection); tty_unregister_device(gb_tty_driver, gb_tty->minor); --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -3191,7 +3191,6 @@ void uart_remove_one_port(struct uart_dr struct uart_state *state = drv->state + uport->line; struct tty_port *port = &state->port; struct uart_port *uart_port; - struct tty_struct *tty;
mutex_lock(&port_mutex);
@@ -3217,11 +3216,7 @@ void uart_remove_one_port(struct uart_dr */ tty_port_unregister_device(port, drv->tty_driver, uport->line);
- tty = tty_port_tty_get(port); - if (tty) { - tty_vhangup(port->tty); - tty_kref_put(tty); - } + tty_port_tty_vhangup(port);
/* * If the port is used as a console, unregister it --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -416,15 +416,19 @@ EXPORT_SYMBOL(tty_port_hangup); * @port: tty port * @check_clocal: hang only ttys with %CLOCAL unset? */ -void tty_port_tty_hangup(struct tty_port *port, bool check_clocal) +void __tty_port_tty_hangup(struct tty_port *port, bool check_clocal, bool async) { struct tty_struct *tty = tty_port_tty_get(port);
- if (tty && (!check_clocal || !C_CLOCAL(tty))) - tty_hangup(tty); + if (tty && (!check_clocal || !C_CLOCAL(tty))) { + if (async) + tty_hangup(tty); + else + tty_vhangup(tty); + } tty_kref_put(tty); } -EXPORT_SYMBOL_GPL(tty_port_tty_hangup); +EXPORT_SYMBOL_GPL(__tty_port_tty_hangup);
/** * tty_port_tty_wakeup - helper to wake up a tty --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1548,7 +1548,6 @@ err_put_port: static void acm_disconnect(struct usb_interface *intf) { struct acm *acm = usb_get_intfdata(intf); - struct tty_struct *tty; int i;
/* sibling interface is already cleaning up */ @@ -1575,11 +1574,7 @@ static void acm_disconnect(struct usb_in usb_set_intfdata(acm->data, NULL); mutex_unlock(&acm->mutex);
- tty = tty_port_tty_get(&acm->port); - if (tty) { - tty_vhangup(tty); - tty_kref_put(tty); - } + tty_port_tty_vhangup(&acm->port);
cancel_delayed_work_sync(&acm->dwork);
--- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -1179,7 +1179,6 @@ static void usb_serial_disconnect(struct struct usb_serial *serial = usb_get_intfdata(interface); struct device *dev = &interface->dev; struct usb_serial_port *port; - struct tty_struct *tty;
/* sibling interface is cleaning up */ if (!serial) @@ -1194,11 +1193,7 @@ static void usb_serial_disconnect(struct
for (i = 0; i < serial->num_ports; ++i) { port = serial->port[i]; - tty = tty_port_tty_get(&port->port); - if (tty) { - tty_vhangup(tty); - tty_kref_put(tty); - } + tty_port_tty_vhangup(&port->port); usb_serial_port_poison_urbs(port); wake_up_interruptible(&port->port.delta_msr_wait); cancel_work_sync(&port->work); --- a/include/linux/tty_port.h +++ b/include/linux/tty_port.h @@ -234,7 +234,7 @@ int tty_port_carrier_raised(struct tty_p void tty_port_raise_dtr_rts(struct tty_port *port); void tty_port_lower_dtr_rts(struct tty_port *port); void tty_port_hangup(struct tty_port *port); -void tty_port_tty_hangup(struct tty_port *port, bool check_clocal); +void __tty_port_tty_hangup(struct tty_port *port, bool check_clocal, bool async); void tty_port_tty_wakeup(struct tty_port *port); int tty_port_block_til_ready(struct tty_port *port, struct tty_struct *tty, struct file *filp); @@ -253,4 +253,14 @@ static inline int tty_port_users(struct return port->count + port->blocked_open; }
+static inline void tty_port_tty_hangup(struct tty_port *port, bool check_clocal) +{ + __tty_port_tty_hangup(port, check_clocal, true); +} + +static inline void tty_port_tty_vhangup(struct tty_port *port) +{ + __tty_port_tty_hangup(port, false, false); +} + #endif --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -438,7 +438,6 @@ static int __rfcomm_release_dev(void __u { struct rfcomm_dev_req req; struct rfcomm_dev *dev; - struct tty_struct *tty;
if (copy_from_user(&req, arg, sizeof(req))) return -EFAULT; @@ -464,11 +463,7 @@ static int __rfcomm_release_dev(void __u rfcomm_dlc_close(dev->dlc, 0);
/* Shut down TTY synchronously before freeing rfcomm_dev */ - tty = tty_port_tty_get(&dev->port); - if (tty) { - tty_vhangup(tty); - tty_kref_put(tty); - } + tty_port_tty_vhangup(&dev->port);
if (!test_bit(RFCOMM_TTY_OWNED, &dev->status)) tty_port_put(&dev->port);