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| author | Alan Cox <alan@linux.intel.com> | 2009-09-19 22:13:23 +0200 |
|---|---|---|
| committer | Live-CD User <linux@linux.site> | 2009-09-19 22:13:23 +0200 |
| commit | d2b391822a11302add9e46476f3da4e18e6de84c (patch) | |
| tree | 26cd352e935d0cf3c65181d78f9af86b21b48e79 | |
| parent | cdc_acm: Fix to use modern speed interfaces (diff) | |
| download | linux-d2b391822a11302add9e46476f3da4e18e6de84c.tar.xz linux-d2b391822a11302add9e46476f3da4e18e6de84c.zip | |
tty: USB hangup is racy
The USB layer uses tty_hangup to deal with unplugs of the physical hardware
(analogous to loss of carrier) and then frees the resources. However the
tty_hangup is asynchronous. As the hangup can sleep we can use tty_vhangup
which is the non async version to avoid freeing resources too early.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 99188c92068b..21dd72a5a715 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -1161,10 +1161,7 @@ void usb_serial_disconnect(struct usb_interface *interface) if (port) { struct tty_struct *tty = tty_port_tty_get(&port->port); if (tty) { - /* The hangup will occur asynchronously but - the object refcounts will sort out all the - cleanup */ - tty_hangup(tty); + tty_vhangup(tty); tty_kref_put(tty); } kill_traffic(port); |