diff options
author | Peter Hurley <peter@hurleysoftware.com> | 2016-04-10 02:53:25 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-30 18:26:55 +0200 |
commit | d41861ca19c9e96f12a4f1ebbc8255d00909a232 (patch) | |
tree | 4b09c15500d404b0b375469dd673f0bc8fd05f5f /drivers/usb/serial/generic.c | |
parent | tty: Replace ASYNC_SUSPENDED bit and update atomically (diff) | |
download | linux-d41861ca19c9e96f12a4f1ebbc8255d00909a232.tar.xz linux-d41861ca19c9e96f12a4f1ebbc8255d00909a232.zip |
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/generic.c')
-rw-r--r-- | drivers/usb/serial/generic.c | 6 |
1 files changed, 3 insertions, 3 deletions
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) { |