diff options
| author | Jan Kiszka <jan.kiszka@web.de> | 2010-02-08 13:12:28 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-17 03:01:28 +0300 |
| commit | 46324511809251adbedb874cc08692e247f7ed68 (patch) | |
| tree | fc911aded2a75d50b7c922da86957b028cb189c8 | |
| parent | 0159d5491fef4acadd116a989b671e1cd350382f (diff) | |
| download | linux-46324511809251adbedb874cc08692e247f7ed68.tar.xz | |
CAPI: Establish install/cleanup handlers for capiminor TTYs
Properly associate/disassociate a capiminor object with its TTY via the
install/cleanup handlers instead of trying to guess first open and last
close.
Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/isdn/capi/capi.c | 42 |
1 files changed, 28 insertions, 14 deletions
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c index 732cdb585b2d..3e4997ac67ae 100644 --- a/drivers/isdn/capi/capi.c +++ b/drivers/isdn/capi/capi.c @@ -1005,16 +1005,34 @@ static const struct file_operations capi_fops = #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE /* -------- tty_operations for capincci ----------------------------- */ -static int capinc_tty_open(struct tty_struct * tty, struct file * file) +static int +capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty) { - struct capiminor *mp; - unsigned long flags; + int idx = tty->index; + struct capiminor *mp = capiminor_get(idx); + int ret = tty_init_termios(tty); + + if (ret == 0) { + tty_driver_kref_get(driver); + tty->count++; + tty->driver_data = mp; + driver->ttys[idx] = tty; + } else + capiminor_put(mp); + return ret; +} - mp = capiminor_get(iminor(file->f_path.dentry->d_inode)); - if (mp->nccip == NULL) - return -ENXIO; +static void capinc_tty_cleanup(struct tty_struct *tty) +{ + struct capiminor *mp = tty->driver_data; + tty->driver_data = NULL; + capiminor_put(mp); +} - tty->driver_data = (void *)mp; +static int capinc_tty_open(struct tty_struct * tty, struct file * file) +{ + struct capiminor *mp = tty->driver_data; + unsigned long flags; spin_lock_irqsave(&workaround_lock, flags); if (atomic_read(&mp->ttyopencount) == 0) @@ -1030,15 +1048,12 @@ static int capinc_tty_open(struct tty_struct * tty, struct file * file) static void capinc_tty_close(struct tty_struct * tty, struct file * file) { - struct capiminor *mp; + struct capiminor *mp = tty->driver_data; - mp = (struct capiminor *)tty->driver_data; - if (mp) { if (atomic_dec_and_test(&mp->ttyopencount)) { #ifdef _DEBUG_REFCOUNT printk(KERN_DEBUG "capinc_tty_close lastclose\n"); #endif - tty->driver_data = NULL; mp->tty = NULL; } #ifdef _DEBUG_REFCOUNT @@ -1047,9 +1062,6 @@ static void capinc_tty_close(struct tty_struct * tty, struct file * file) if (mp->nccip == NULL) capiminor_free(mp); - capiminor_put(mp); - } - #ifdef _DEBUG_REFCOUNT printk(KERN_DEBUG "capinc_tty_close\n"); #endif @@ -1333,6 +1345,8 @@ static const struct tty_operations capinc_ops = { .flush_buffer = capinc_tty_flush_buffer, .set_ldisc = capinc_tty_set_ldisc, .send_xchar = capinc_tty_send_xchar, + .install = capinc_tty_install, + .cleanup = capinc_tty_cleanup, }; static int __init capinc_tty_init(void) |