diff options
author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-04-30 03:54:13 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 11:29:47 -0400 |
commit | f34d7a5b7010b82fe97da95496b9971435530062 (patch) | |
tree | 87e2abec1e33ed4fe5e63ee2fd000bc2ad745e57 /drivers/net/hamradio/mkiss.c | |
parent | 251b8dd7eee30fda089a1dc088abf4fc9a0dee9c (diff) |
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/net/hamradio/mkiss.c')
-rw-r--r-- | drivers/net/hamradio/mkiss.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c index 30c9b3b0d131..ebcc5adee7cc 100644 --- a/drivers/net/hamradio/mkiss.c +++ b/drivers/net/hamradio/mkiss.c | |||
@@ -516,7 +516,7 @@ static void ax_encaps(struct net_device *dev, unsigned char *icp, int len) | |||
516 | spin_unlock_bh(&ax->buflock); | 516 | spin_unlock_bh(&ax->buflock); |
517 | 517 | ||
518 | set_bit(TTY_DO_WRITE_WAKEUP, &ax->tty->flags); | 518 | set_bit(TTY_DO_WRITE_WAKEUP, &ax->tty->flags); |
519 | actual = ax->tty->driver->write(ax->tty, ax->xbuff, count); | 519 | actual = ax->tty->ops->write(ax->tty, ax->xbuff, count); |
520 | ax->stats.tx_packets++; | 520 | ax->stats.tx_packets++; |
521 | ax->stats.tx_bytes += actual; | 521 | ax->stats.tx_bytes += actual; |
522 | 522 | ||
@@ -546,7 +546,7 @@ static int ax_xmit(struct sk_buff *skb, struct net_device *dev) | |||
546 | } | 546 | } |
547 | 547 | ||
548 | printk(KERN_ERR "mkiss: %s: transmit timed out, %s?\n", dev->name, | 548 | printk(KERN_ERR "mkiss: %s: transmit timed out, %s?\n", dev->name, |
549 | (ax->tty->driver->chars_in_buffer(ax->tty) || ax->xleft) ? | 549 | (ax->tty->ops->chars_in_buffer(ax->tty) || ax->xleft) ? |
550 | "bad line quality" : "driver error"); | 550 | "bad line quality" : "driver error"); |
551 | 551 | ||
552 | ax->xleft = 0; | 552 | ax->xleft = 0; |
@@ -736,6 +736,8 @@ static int mkiss_open(struct tty_struct *tty) | |||
736 | 736 | ||
737 | if (!capable(CAP_NET_ADMIN)) | 737 | if (!capable(CAP_NET_ADMIN)) |
738 | return -EPERM; | 738 | return -EPERM; |
739 | if (tty->ops->write == NULL) | ||
740 | return -EOPNOTSUPP; | ||
739 | 741 | ||
740 | dev = alloc_netdev(sizeof(struct mkiss), "ax%d", ax_setup); | 742 | dev = alloc_netdev(sizeof(struct mkiss), "ax%d", ax_setup); |
741 | if (!dev) { | 743 | if (!dev) { |
@@ -754,8 +756,7 @@ static int mkiss_open(struct tty_struct *tty) | |||
754 | tty->disc_data = ax; | 756 | tty->disc_data = ax; |
755 | tty->receive_room = 65535; | 757 | tty->receive_room = 65535; |
756 | 758 | ||
757 | if (tty->driver->flush_buffer) | 759 | tty_driver_flush_buffer(tty); |
758 | tty->driver->flush_buffer(tty); | ||
759 | 760 | ||
760 | /* Restore default settings */ | 761 | /* Restore default settings */ |
761 | dev->type = ARPHRD_AX25; | 762 | dev->type = ARPHRD_AX25; |
@@ -936,8 +937,8 @@ static void mkiss_receive_buf(struct tty_struct *tty, const unsigned char *cp, | |||
936 | 937 | ||
937 | mkiss_put(ax); | 938 | mkiss_put(ax); |
938 | if (test_and_clear_bit(TTY_THROTTLED, &tty->flags) | 939 | if (test_and_clear_bit(TTY_THROTTLED, &tty->flags) |
939 | && tty->driver->unthrottle) | 940 | && tty->ops->unthrottle) |
940 | tty->driver->unthrottle(tty); | 941 | tty->ops->unthrottle(tty); |
941 | } | 942 | } |
942 | 943 | ||
943 | /* | 944 | /* |
@@ -962,7 +963,7 @@ static void mkiss_write_wakeup(struct tty_struct *tty) | |||
962 | goto out; | 963 | goto out; |
963 | } | 964 | } |
964 | 965 | ||
965 | actual = tty->driver->write(tty, ax->xhead, ax->xleft); | 966 | actual = tty->ops->write(tty, ax->xhead, ax->xleft); |
966 | ax->xleft -= actual; | 967 | ax->xleft -= actual; |
967 | ax->xhead += actual; | 968 | ax->xhead += actual; |
968 | 969 | ||