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| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-04-30 00:54:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:47 -0700 |
| commit | f34d7a5b7010b82fe97da95496b9971435530062 (patch) | |
| tree | 87e2abec1e33ed4fe5e63ee2fd000bc2ad745e57 /drivers/char/n_hdlc.c | |
| parent | 251b8dd7eee30fda089a1dc088abf4fc9a0dee9c (diff) | |
| download | kernel-common-f34d7a5b7010b82fe97da95496b9971435530062.tar.gz kernel-common-f34d7a5b7010b82fe97da95496b9971435530062.tar.bz2 kernel-common-f34d7a5b7010b82fe97da95496b9971435530062.zip | |
tty: The big operations rework
- Operations are now a shared const function block as with most other Linux
objects
- Introduce wrappers for some optional functions to get consistent behaviour
- Wrap put_char which used to be patched by the tty layer
- Document which functions are needed/optional
- Make put_char report success/fail
- Cache the driver->ops pointer in the tty as tty->ops
- Remove various surplus lock calls we no longer need
- Remove proc_write method as noted by Alexey Dobriyan
- Introduce some missing sanity checks where certain driver/ldisc
combinations would oops as they didn't check needed methods were present
[akpm@linux-foundation.org: fix fs/compat_ioctl.c build]
[akpm@linux-foundation.org: fix isicom]
[akpm@linux-foundation.org: fix arch/ia64/hp/sim/simserial.c build]
[akpm@linux-foundation.org: fix kgdb]
Signed-off-by: Alan Cox <alan@redhat.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/n_hdlc.c')
| -rw-r--r-- | drivers/char/n_hdlc.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/char/n_hdlc.c b/drivers/char/n_hdlc.c index a07c0af4819e..a35bfd7ee80e 100644 --- a/drivers/char/n_hdlc.c +++ b/drivers/char/n_hdlc.c @@ -342,12 +342,10 @@ static int n_hdlc_tty_open (struct tty_struct *tty) #endif /* Flush any pending characters in the driver and discipline. */ - if (tty->ldisc.flush_buffer) - tty->ldisc.flush_buffer (tty); + tty->ldisc.flush_buffer(tty); - if (tty->driver->flush_buffer) - tty->driver->flush_buffer (tty); + tty_driver_flush_buffer(tty); if (debuglevel >= DEBUG_LEVEL_INFO) printk("%s(%d)n_hdlc_tty_open() success\n",__FILE__,__LINE__); @@ -399,7 +397,7 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty) /* Send the next block of data to device */ tty->flags |= (1 << TTY_DO_WRITE_WAKEUP); - actual = tty->driver->write(tty, tbuf->buf, tbuf->count); + actual = tty->ops->write(tty, tbuf->buf, tbuf->count); /* rollback was possible and has been done */ if (actual == -ERESTARTSYS) { @@ -752,8 +750,7 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file, case TIOCOUTQ: /* get the pending tx byte count in the driver */ - count = tty->driver->chars_in_buffer ? - tty->driver->chars_in_buffer(tty) : 0; + count = tty_chars_in_buffer(tty); /* add size of next output frame in queue */ spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock,flags); if (n_hdlc->tx_buf_list.head) |