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2.6.26 -stable review patch. If anyone has any objections, please let
us know.
------------------
From: Oliver Neukum <oliver@neukum.org>
commit 62ad296b6ca78bd123864c138814c0a597873693 upstream
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/serial/usb-serial.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -283,7 +283,10 @@ static void serial_close(struct tty_stru
}
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);
}
--
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