diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2016-04-10 03:53:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-30 19:26:55 +0300 |
| commit | d41861ca19c9e96f12a4f1ebbc8255d00909a232 (patch) | |
| tree | 4b09c15500d404b0b375469dd673f0bc8fd05f5f /drivers/tty/n_gsm.c | |
| parent | 80f02d5424301bf4df195d09b1a664f394435851 (diff) | |
| download | linux-d41861ca19c9e96f12a4f1ebbc8255d00909a232.tar.xz | |
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/tty/n_gsm.c')
| -rw-r--r-- | drivers/tty/n_gsm.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 365dfd8bc42b..9f7a7bbff57d 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2949,7 +2949,7 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp) dlci->modem_rx = 0; /* We could in theory open and close before we wait - eg if we get a DM straight back. This is ok as that will have caused a hangup */ - set_bit(ASYNCB_INITIALIZED, &port->flags); + tty_port_set_initialized(port, 1); /* Start sending off SABM messages */ gsm_dlci_begin_open(dlci); /* And wait for virtual carrier */ @@ -2972,10 +2972,8 @@ static void gsmtty_close(struct tty_struct *tty, struct file *filp) if (tty_port_close_start(&dlci->port, tty, filp) == 0) return; gsm_dlci_begin_close(dlci); - if (test_bit(ASYNCB_INITIALIZED, &dlci->port.flags)) { - if (C_HUPCL(tty)) - tty_port_lower_dtr_rts(&dlci->port); - } + if (tty_port_initialized(&dlci->port) && C_HUPCL(tty)) + tty_port_lower_dtr_rts(&dlci->port); tty_port_close_end(&dlci->port, tty); tty_port_tty_set(&dlci->port, NULL); return; |