[PATCH] Make xircom cardbus handle shared irq

[Stephen Hemminger <shemminger@xxxxxxxx>]

Current driver doesn't do shared irq properly.  When testing on
a laptop here irq 3 get shared between pcmcia slot and tty/IRDA

diff -Nru a/drivers/net/tulip/xircom_cb.c b/drivers/net/tulip/xircom_cb.c
--- a/drivers/net/tulip/xircom_cb.c     Thu Jan 22 16:46:34 2004
+++ b/drivers/net/tulip/xircom_cb.c     Thu Jan 22 16:46:34 2004
@@ -342,6 +342,11 @@
        printk("tx status 0x%08x 0x%08x 
\n",card->tx_buffer[0],card->tx_buffer[4]);
        printk("rx status 0x%08x 0x%08x 
\n",card->rx_buffer[0],card->rx_buffer[4]);
 #endif 
+       /* Handle shared irq and hotplug */
+       if (status == 0 || status == 0xffffffff) {
+               spin_unlock(&card->lock);
+               return IRQ_NONE;
+       }
 
        if (link_status_changed(card)) {
                int newlink;