ipwireless: fix potential tty == NULL dereference

[karo-tx-linux.git] / drivers / char / pcmcia / ipwireless / network.c

diff --git a/drivers/char/pcmcia/ipwireless/network.c b/drivers/char/pcmcia/ipwireless/network.c
index ff35230058d36e7fd235b73b8884f2bb799f497c..d793e68b3e0d913030402978e46a05eedd8abf40 100644 (file)
--- a/drivers/char/pcmcia/ipwireless/network.c
+++ b/drivers/char/pcmcia/ipwireless/network.c
@@ -377,13 +377,16 @@ void ipwireless_network_packet_received(struct ipw_network *network,
        for (i = 0; i < MAX_ASSOCIATED_TTYS; i++) {
                struct ipw_tty *tty = network->associated_ttys[channel_idx][i];
 
+               if (!tty)
+                       continue;
+
                /*
                 * If it's associated with a tty (other than the RAS channel
                 * when we're online), then send the data to that tty.  The RAS
                 * channel's data is handled above - it always goes through
                 * ppp_generic.
                 */
-               if (tty && channel_idx == IPW_CHANNEL_RAS
+               if (channel_idx == IPW_CHANNEL_RAS
                                && (network->ras_control_lines &
                                        IPW_CONTROL_LINE_DCD) != 0
                                && ipwireless_tty_is_modem(tty)) {