Showing error 831

User: Jiri Slaby
Error type: Resource Leak
Error type description: The code omits to put the resource to the system for reuse
File location: drivers/char/isicom.c
Line in file: 981
Project: Linux Kernel
Project version: 2.6.28
Tools: Stanse (1.2)
Entered: 2011-11-07 22:40:13 UTC

Source: 

 951
 952/* card->lock HAS to be held */
 953static void isicom_shutdown_port(struct isi_port *port)
 954{
 955        struct isi_board *card = port->card;
 956        struct tty_struct *tty;
 957
 958        tty = tty_port_tty_get(&port->port);
 959
 960        if (!(port->port.flags & ASYNC_INITIALIZED)) {
 961                tty_kref_put(tty);
 962                return;
 963        }
 964
 965        tty_port_free_xmit_buf(&port->port);
 966        port->port.flags &= ~ASYNC_INITIALIZED;
 967        /* 3rd October 2000 : Vinayak P Risbud */
 968        tty_port_tty_set(&port->port, NULL);
 969
 970        /*Fix done by Anil .S on 30-04-2001
 971        remote login through isi port has dtr toggle problem
 972        due to which the carrier drops before the password prompt
 973        appears on the remote end. Now we drop the dtr only if the
 974        HUPCL(Hangup on close) flag is set for the tty*/
 975
 976        if (C_HUPCL(tty))
 977                /* drop dtr on this port */
 978                drop_dtr(port);
 979
 980        /* any other port uninits  */
 981        if (tty)
 982                set_bit(TTY_IO_ERROR, &tty->flags);
 983
 984        if (--card->count < 0) {
 985                pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
 986                        card->base, card->count);
 987                card->count = 0;
 988        }
 989
 990        /* last port was closed, shutdown that boad too */
 991        if (C_HUPCL(tty)) {
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