[PATCH] Tulip interrupt uses non IRQ safe spinlock

["Mark Broadbent" <markb@xxxxxxxxxxxxxx>]

The interrupt handling code in the tulip network driver appears to use a non 
IRQ safe spinlock in an interrupt context.  The following patch should correct 
this.

Signed-off-by: Mark Broadbent <markb@xxxxxxxxxxxxxx>

Index: linux-2.6.11/drivers/net/tulip/interrupt.c
===================================================================
--- linux-2.6.11.orig/drivers/net/tulip/interrupt.c     2005-03-07 
18:11:23.000000000 +0000
+++ linux-2.6.11/drivers/net/tulip/interrupt.c  2005-04-28 16:16:23.000000000 
+0100
@@ -567,8 +567,9 @@
 
                if (csr5 & (TxNoBuf | TxDied | TxIntr | TimerInt)) {
                        unsigned int dirty_tx;
+                       unsigned long flags;
 
-                       spin_lock(&tp->lock);
+                       spin_lock_irqsave(&tp->lock, flags);
 
                        for (dirty_tx = tp->dirty_tx; tp->cur_tx - dirty_tx > 0;
                                 dirty_tx++) {
@@ -640,7 +641,7 @@
                                                   dev->name, csr5, 
ioread32(ioaddr + CSR6), tp->csr6);
                                tulip_restart_rxtx(tp);
                        }
-                       spin_unlock(&tp->lock);
+                       spin_unlock_irqrestore(&tp->lock, flags);
                }
 
                /* Log errors. */