usbserial: Reference leak

A sufficiently-large number of USB serial devices causes a reference leak
when /proc/tty/drivers/usbserial is read.

Signed-Off-By: Matthias Urlichs <smurf@smurf.noris.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 12c1694d322e..e06a41bd0f3b 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -464,8 +464,10 @@ static int serial_read_proc (char *page, char **start, off_t off, int count, int
                 length += sprintf (page+length, " path:%s", tmp);
                         
                 length += sprintf (page+length, "\n");
-                if ((length + begin) > (off + count))
+                if ((length + begin) > (off + count)) {
+                        usb_serial_put(serial);
                         goto done;
+                }
                 if ((length + begin) < off) {
                         begin += length;
                         length = 0;