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| author |  Peter Hurley <peter@hurleysoftware.com>
| 2013-03-11 16:44:34 -0400 |
|---|---|---|
| committer |  Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| 2013-03-18 16:44:02 -0700 |
| commit | 4f98d4675166fc1991dbad7dd2af634df7c14061 (patch) | |
| tree | 75695c7c73a7a79d398cb748a65ede865a24733d /drivers/tty/tty_port.c | |
| parent | tty: Don't reenable already enabled ldisc (diff) | |
| download | linux-4f98d4675166fc1991dbad7dd2af634df7c14061.tar.gz linux-4f98d4675166fc1991dbad7dd2af634df7c14061.tar.bz2 linux-4f98d4675166fc1991dbad7dd2af634df7c14061.zip | |
tty: Complete ownership transfer of flip buffers
Waiting for buffer work to complete is not required for safely
performing changes to the line discipline, once the line discipline
is halted. The buffer work routine, flush_to_ldisc(), will be
unable to acquire an ldisc ref and all existing references were
waited until released (so it can't already have one).
Ensure running buffer work which may reference the soon-to-be-gone
tty completes and any buffer work running after this point retrieves
a NULL tty.
Also, ensure all buffer work is cancelled on port destruction.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/tty_port.c')
| -rw-r--r-- | drivers/tty/tty_port.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 969c3e675a76..121aeb9393e1 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -132,6 +132,7 @@ EXPORT_SYMBOL(tty_port_free_xmit_buf); */ void tty_port_destroy(struct tty_port *port) { + cancel_work_sync(&port->buf.work); tty_buffer_free_all(port); } EXPORT_SYMBOL(tty_port_destroy); |