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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-12 02:34:40 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-12 02:34:40 +0300 |
| commit | 0f4974c439dd7826c85bae4e6a8088ce2db0f498 (patch) | |
| tree | fdabc7d9bb7d7bc49aad547c0aac3a633ce01f09 /fs | |
| parent | 3126c136bc30225d7a43af741778aa50e95e467a (diff) | |
| parent | 36ba782e9674cdc29ec7003757df0b375e99fa96 (diff) | |
| download | linux-0f4974c439dd7826c85bae4e6a8088ce2db0f498.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (58 commits)
tty: split the lock up a bit further
tty: Move the leader test in disassociate
tty: Push the bkl down a bit in the hangup code
tty: Push the lock down further into the ldisc code
tty: push the BKL down into the handlers a bit
tty: moxa: split open lock
tty: moxa: Kill the use of lock_kernel
tty: moxa: Fix modem op locking
tty: moxa: Kill off the throttle method
tty: moxa: Locking clean up
tty: moxa: rework the locking a bit
tty: moxa: Use more tty_port ops
tty: isicom: fix deadlock on shutdown
tty: mxser: Use the new locking rules to fix setserial properly
tty: mxser: use the tty_port_open method
tty: isicom: sort out the board init logic
tty: isicom: switch to the new tty_port_open helper
tty: tty_port: Add a kref object to the tty port
tty: istallion: tty port open/close methods
tty: stallion: Convert to the tty_port_open/close methods
...
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/devpts/inode.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c index d5f8c96964be..8882ecc0f1bf 100644 --- a/fs/devpts/inode.c +++ b/fs/devpts/inode.c @@ -517,11 +517,23 @@ int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty) struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number) { + struct dentry *dentry; + struct tty_struct *tty; + BUG_ON(pts_inode->i_rdev == MKDEV(TTYAUX_MAJOR, PTMX_MINOR)); + /* Ensure dentry has not been deleted by devpts_pty_kill() */ + dentry = d_find_alias(pts_inode); + if (!dentry) + return NULL; + + tty = NULL; if (pts_inode->i_sb->s_magic == DEVPTS_SUPER_MAGIC) - return (struct tty_struct *)pts_inode->i_private; - return NULL; + tty = (struct tty_struct *)pts_inode->i_private; + + dput(dentry); + + return tty; } void devpts_pty_kill(struct tty_struct *tty) |