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authorAlan Cox <alan@redhat.com>2008-10-13 10:42:00 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-13 09:51:42 -0700
commit99f1fe189daf8e99a847e420567e49dd7ee2aae7 (patch)
tree09db410aa2b32e74086593eb771c75efe553a585 /drivers/char/pty.c
parent23499705753ab8b4c6b0b64e6c424a370bd900a1 (diff)
downloadop-kernel-dev-99f1fe189daf8e99a847e420567e49dd7ee2aae7.zip
op-kernel-dev-99f1fe189daf8e99a847e420567e49dd7ee2aae7.tar.gz
tty: Clean up the tty_init_dev changes further
Fix up the naming, style and extract some bits of code into the driver specific code Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/pty.c')
-rw-r--r--drivers/char/pty.c49
1 files changed, 48 insertions, 1 deletions
diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index 328e8ac..6e148ad 100644
--- a/drivers/char/pty.c
+++ b/drivers/char/pty.c
@@ -391,6 +391,41 @@ static int pty_unix98_ioctl(struct tty_struct *tty, struct file *file,
return -ENOIOCTLCMD;
}
+/**
+ * ptm_unix98_lookup - find a pty master
+ * @driver: ptm driver
+ * @idx: tty index
+ *
+ * Look up a pty master device. Called under the tty_mutex for now.
+ * This provides our locking.
+ */
+
+static struct tty_struct *ptm_unix98_lookup(struct tty_driver *driver, int idx)
+{
+ struct tty_struct *tty = devpts_get_tty(idx);
+ if (tty)
+ tty = tty->link;
+ return tty;
+}
+
+/**
+ * pts_unix98_lookup - find a pty slave
+ * @driver: pts driver
+ * @idx: tty index
+ *
+ * Look up a pty master device. Called under the tty_mutex for now.
+ * This provides our locking.
+ */
+
+static struct tty_struct *pts_unix98_lookup(struct tty_driver *driver, int idx)
+{
+ struct tty_struct *tty = devpts_get_tty(idx);
+ /* Master must be open before slave */
+ if (!tty)
+ return ERR_PTR(-EIO);
+ return tty;
+}
+
static void pty_shutdown(struct tty_struct *tty)
{
/* We have our own method as we don't use the tty index */
@@ -399,6 +434,7 @@ static void pty_shutdown(struct tty_struct *tty)
}
static const struct tty_operations ptm_unix98_ops = {
+ .lookup = ptm_unix98_lookup,
.open = pty_open,
.close = pty_close,
.write = pty_write,
@@ -411,6 +447,17 @@ static const struct tty_operations ptm_unix98_ops = {
.shutdown = pty_shutdown
};
+static const struct tty_operations pty_unix98_ops = {
+ .lookup = pts_unix98_lookup,
+ .open = pty_open,
+ .close = pty_close,
+ .write = pty_write,
+ .write_room = pty_write_room,
+ .flush_buffer = pty_flush_buffer,
+ .chars_in_buffer = pty_chars_in_buffer,
+ .unthrottle = pty_unthrottle,
+ .set_termios = pty_set_termios,
+};
/**
* ptmx_open - open a unix 98 pty master
@@ -517,7 +564,7 @@ static void __init unix98_pty_init(void)
pts_driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW |
TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_DEVPTS_MEM;
pts_driver->other = ptm_driver;
- tty_set_operations(pts_driver, &pty_ops);
+ tty_set_operations(pts_driver, &pty_unix98_ops);
if (tty_register_driver(ptm_driver))
panic("Couldn't register Unix98 ptm driver");
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