diff options
| author | Linux Build Service Account <lnxbuild@localhost> | 2018-05-02 13:38:40 -0700 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2018-05-02 13:38:40 -0700 |
| commit | 9da06237e8cbb2f20a35adf23af8c7bb3b245804 (patch) | |
| tree | f65b0944b4f3fe43070f3a10676fe2062456b007 /drivers/tty/tty_io.c | |
| parent | 6fa93fc89f5e5641c0ad1be533b016e065cbf04d (diff) | |
| parent | ee76c85f715377aec3b0115e48b7d66a726ffdea (diff) | |
Merge "Merge android-4.4.129 (b1c4836) into msm-4.4"
Diffstat (limited to 'drivers/tty/tty_io.c')
| -rw-r--r-- | drivers/tty/tty_io.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index a638c1738547..89fd20382ce4 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -702,6 +702,14 @@ static void __tty_hangup(struct tty_struct *tty, int exit_session) return; } + /* + * Some console devices aren't actually hung up for technical and + * historical reasons, which can lead to indefinite interruptible + * sleep in n_tty_read(). The following explicitly tells + * n_tty_read() to abort readers. + */ + set_bit(TTY_HUPPING, &tty->flags); + /* inuse_filps is protected by the single tty lock, this really needs to change if we want to flush the workqueue with the lock held */ @@ -757,6 +765,7 @@ static void __tty_hangup(struct tty_struct *tty, int exit_session) * can't yet guarantee all that. */ set_bit(TTY_HUPPED, &tty->flags); + clear_bit(TTY_HUPPING, &tty->flags); tty_unlock(tty); if (f) |