diff options
author | Peter Hurley <peter@hurleysoftware.com> | 2016-04-09 17:53:25 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-30 09:26:55 -0700 |
commit | d41861ca19c9e96f12a4f1ebbc8255d00909a232 (patch) | |
tree | 4b09c15500d404b0b375469dd673f0bc8fd05f5f /drivers/usb/serial | |
parent | 80f02d5424301bf4df195d09b1a664f394435851 (diff) | |
download | linux-d41861ca19c9e96f12a4f1ebbc8255d00909a232.tar.bz2 |
tty: Replace ASYNC_INITIALIZED bit and update atomically
Replace ASYNC_INITIALIZED bit in the tty_port::flags field with
TTY_PORT_INITIALIZED bit in the tty_port::iflags field. Introduce helpers
tty_port_set_initialized() and tty_port_initialized() to abstract
atomic bit ops.
Note: the transforms for test_and_set_bit() and test_and_clear_bit()
are unnecessary as the state transitions are already mutually exclusive;
the tty lock prevents concurrent open/close/hangup.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/serial')
-rw-r--r-- | drivers/usb/serial/console.c | 4 | ||||
-rw-r--r-- | drivers/usb/serial/generic.c | 6 | ||||
-rw-r--r-- | drivers/usb/serial/mxuport.c | 6 | ||||
-rw-r--r-- | drivers/usb/serial/sierra.c | 4 | ||||
-rw-r--r-- | drivers/usb/serial/usb-serial.c | 2 | ||||
-rw-r--r-- | drivers/usb/serial/usb_wwan.c | 4 |
6 files changed, 13 insertions, 13 deletions
diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c index a66b01bb1fa1..8967715fe6fc 100644 --- a/drivers/usb/serial/console.c +++ b/drivers/usb/serial/console.c @@ -127,7 +127,7 @@ static int usb_console_setup(struct console *co, char *options) info->port = port; ++port->port.count; - if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) { + if (!tty_port_initialized(&port->port)) { if (serial->type->set_termios) { /* * allocate a fake tty so the driver can initialize @@ -168,7 +168,7 @@ static int usb_console_setup(struct console *co, char *options) tty_port_tty_set(&port->port, NULL); tty_kref_put(tty); } - set_bit(ASYNCB_INITIALIZED, &port->port.flags); + tty_port_set_initialized(&port->port, 1); } /* Now that any required fake tty operations are completed restore * the tty port count */ diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c index 54e170dd3dad..ae8c0365abd6 100644 --- a/drivers/usb/serial/generic.c +++ b/drivers/usb/serial/generic.c @@ -473,7 +473,7 @@ static bool usb_serial_generic_msr_changed(struct tty_struct *tty, * Use tty-port initialised flag to detect all hangups including the * one generated at USB-device disconnect. */ - if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) + if (!tty_port_initialized(&port->port)) return true; spin_lock_irqsave(&port->lock, flags); @@ -503,7 +503,7 @@ int usb_serial_generic_tiocmiwait(struct tty_struct *tty, unsigned long arg) ret = wait_event_interruptible(port->port.delta_msr_wait, usb_serial_generic_msr_changed(tty, arg, &cnow)); - if (!ret && !test_bit(ASYNCB_INITIALIZED, &port->port.flags)) + if (!ret && !tty_port_initialized(&port->port)) ret = -EIO; return ret; @@ -606,7 +606,7 @@ int usb_serial_generic_resume(struct usb_serial *serial) for (i = 0; i < serial->num_ports; i++) { port = serial->port[i]; - if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) + if (!tty_port_initialized(&port->port)) continue; if (port->bulk_in_size) { diff --git a/drivers/usb/serial/mxuport.c b/drivers/usb/serial/mxuport.c index 31a8b47f1ac6..3722d6c1ba77 100644 --- a/drivers/usb/serial/mxuport.c +++ b/drivers/usb/serial/mxuport.c @@ -503,7 +503,7 @@ static void mxuport_process_read_urb_demux_data(struct urb *urb) return; } - if (test_bit(ASYNCB_INITIALIZED, &demux_port->port.flags)) { + if (tty_port_initialized(&demux_port->port)) { ch = data + HEADER_SIZE; mxuport_process_read_urb_data(demux_port, ch, rcv_len); } else { @@ -544,7 +544,7 @@ static void mxuport_process_read_urb_demux_event(struct urb *urb) } demux_port = serial->port[rcv_port]; - if (test_bit(ASYNCB_INITIALIZED, &demux_port->port.flags)) { + if (tty_port_initialized(&demux_port->port)) { ch = data + HEADER_SIZE; rcv_event = get_unaligned_be16(data + 2); mxuport_process_read_urb_event(demux_port, ch, @@ -1339,7 +1339,7 @@ static int mxuport_resume(struct usb_serial *serial) for (i = 0; i < serial->num_ports; i++) { port = serial->port[i]; - if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) + if (!tty_port_initialized(&port->port)) continue; r = usb_serial_generic_write_start(port, GFP_NOIO); diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c index 07d1ecd564f7..e1994e264cc0 100644 --- a/drivers/usb/serial/sierra.c +++ b/drivers/usb/serial/sierra.c @@ -776,7 +776,7 @@ static void sierra_close(struct usb_serial_port *port) /* * Need to take susp_lock to make sure port is not already being - * resumed, but no need to hold it due to ASYNC_INITIALIZED. + * resumed, but no need to hold it due to initialized */ spin_lock_irq(&intfdata->susp_lock); if (--intfdata->open_ports == 0) @@ -1039,7 +1039,7 @@ static int sierra_resume(struct usb_serial *serial) for (i = 0; i < serial->num_ports; i++) { port = serial->port[i]; - if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) + if (!tty_port_initialized(&port->port)) continue; err = sierra_submit_delayed_urbs(port); diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 46f1f13b41f1..3f253aec0c16 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -254,7 +254,7 @@ static int serial_open(struct tty_struct *tty, struct file *filp) * * Shut down a USB serial port. Serialized against activate by the * tport mutex and kept to matching open/close pairs - * of calls by the ASYNCB_INITIALIZED flag. + * of calls by the initialized flag. * * Not called if tty is console. */ diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c index be9cb61b4d19..3dfdfc81254b 100644 --- a/drivers/usb/serial/usb_wwan.c +++ b/drivers/usb/serial/usb_wwan.c @@ -464,7 +464,7 @@ void usb_wwan_close(struct usb_serial_port *port) /* * Need to take susp_lock to make sure port is not already being - * resumed, but no need to hold it due to ASYNC_INITIALIZED. + * resumed, but no need to hold it due to initialized */ spin_lock_irq(&intfdata->susp_lock); if (--intfdata->open_ports == 0) @@ -682,7 +682,7 @@ int usb_wwan_resume(struct usb_serial *serial) for (i = 0; i < serial->num_ports; i++) { port = serial->port[i]; - if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) + if (!tty_port_initialized(&port->port)) continue; portdata = usb_get_serial_port_data(port); |