diff options
| author | Jiri Slaby <jslaby@suse.cz> | 2012-08-07 21:47:28 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-10 13:27:50 -0700 |
| commit | 86176ed905454e568539c77e0cba5759085830bb (patch) | |
| tree | 27b0e14b29d496859488cddb654b80e0f4fce82b | |
| parent | 3dd332c553996eec2593110b05abf8a4819b5c28 (diff) | |
TTY: n_gsm, use tty_port_install
We need to link a port to a tty in install. And since dlci is
allocated even in open, we need to create gsmtty_install, allocate
dlci there and create also the link.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/n_gsm.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 7a4bf3053a15..3778687f748b 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2868,14 +2868,14 @@ static const struct tty_port_operations gsm_port_ops = { .dtr_rts = gsm_dtr_rts, }; - -static int gsmtty_open(struct tty_struct *tty, struct file *filp) +static int gsmtty_install(struct tty_driver *driver, struct tty_struct *tty) { struct gsm_mux *gsm; struct gsm_dlci *dlci; - struct tty_port *port; unsigned int line = tty->index; unsigned int mux = line >> 6; + bool alloc = false; + int ret; line = line & 0x3F; @@ -2890,13 +2890,30 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp) if (gsm->dead) return -EL2HLT; dlci = gsm->dlci[line]; - if (dlci == NULL) + if (dlci == NULL) { + alloc = true; dlci = gsm_dlci_alloc(gsm, line); + } if (dlci == NULL) return -ENOMEM; - port = &dlci->port; - port->count++; + ret = tty_port_install(&dlci->port, driver, tty); + if (ret) { + if (alloc) + dlci_put(dlci); + return ret; + } + tty->driver_data = dlci; + + return 0; +} + +static int gsmtty_open(struct tty_struct *tty, struct file *filp) +{ + struct gsm_dlci *dlci = tty->driver_data; + struct tty_port *port = &dlci->port; + + port->count++; dlci_get(dlci); dlci_get(dlci->gsm->dlci[0]); mux_get(dlci->gsm); @@ -3085,6 +3102,7 @@ static int gsmtty_break_ctl(struct tty_struct *tty, int state) /* Virtual ttys for the demux */ static const struct tty_operations gsmtty_ops = { + .install = gsmtty_install, .open = gsmtty_open, .close = gsmtty_close, .write = gsmtty_write, |