diff options
| author |   Oliver Neukum <oliver@neukum.org> | 2008-06-25 13:32:49 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2008-07-21 15:16:36 -0700 |
| commit | 62ad296b6ca78bd123864c138814c0a597873693 (patch) | |
| tree | 7552b0330b2b4b39a92b84394346175d56fdd858 | |
| parent | USB: autosuspend for cdc-wdm (diff) | |
| download | linux-dev-62ad296b6ca78bd123864c138814c0a597873693.tar.xz linux-dev-62ad296b6ca78bd123864c138814c0a597873693.zip | |
USB: fix usb serial pm counter decrement for disconnected interfaces
usb serial decrements the pm counter even if an interface has been
disconnected. If it was a logical disconnect the interface may belong
already to another driver. This patch introduces a check for disconnected
interfaces.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
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, 4 insertions, 1 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 3bcf33466587..353798631903 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -283,7 +283,10 @@ static void serial_close(struct tty_struct *tty, struct file * filp) } if (port->open_count == 0) { - usb_autopm_put_interface(port->serial->interface); + mutex_lock(&port->serial->disc_mutex); + if (!port->serial->disconnected) + usb_autopm_put_interface(port->serial->interface); + mutex_unlock(&port->serial->disc_mutex); module_put(port->serial->type->driver.owner); } |