Overwrite the device descriptor's IRQ number with whatever the legacy
authorMichael Brown <mcb30@etherboot.org>
Sat, 15 Dec 2007 19:32:32 +0000 (19:32 +0000)
committerMichael Brown <mcb30@etherboot.org>
Sat, 15 Dec 2007 19:32:32 +0000 (19:32 +0000)
driver's probe() routine fills in in nic->irqno.  This is so that
non-interrupt-capable legacy drivers which set nic->irqno=0 will end
up reporting IRQ#0 via PXENV_UNDI_GET_INFORMATION; this in turn means
that the calling PXE NBP will (should) hook the timer interrupt, and
everything will sort of work.

src/drivers/net/legacy.c

index 9b82f1c..32460ad 100644 (file)
@@ -98,12 +98,20 @@ int legacy_probe ( void *hwdev,
        netdev->dev = dev;
 
        nic.node_addr = netdev->ll_addr;
+       nic.irqno = dev->desc.irq;
 
        if ( ! probe ( &nic, hwdev ) ) {
                rc = -ENODEV;
                goto err_probe;
        }
 
+       /* Overwrite the IRQ number.  Some legacy devices set
+        * nic->irqno to 0 in the probe routine to indicate that they
+        * don't support interrupts; doing this allows the timer
+        * interrupt to be used instead.
+        */
+       dev->desc.irq = nic.irqno;
+
        if ( ( rc = register_netdev ( netdev ) ) != 0 )
                goto err_register;