* Turns out the 3com driver wasn't picked up after my changes, but the marvell_yukon driver

worked flawlessly this one time... (I got almost 10 MB/s with that one, now 7.5 MB/s with
  the 3com driver)
* We need to acknowledge the interrupt in the handler, because else, the interrupt continues
  to fire after the PIC interrupt is acknowledged by the kernel.
* It also helps a lot to turn off the interrupts on the device while xl_intr() is handling
  the interrupt.
* When the slow handler is running, we now set the new "handling" field in the internal
  interrupt handler which will not invoke the scheduler then (but only signals a handled
  interrupt).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23085 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/libs/compat/freebsd_network/bus.c

@@ -49,6 +49,7 @@ struct internal_intr {
 
 	thread_id		thread;
 	sem_id			sem;
+	int32			handling;
 };
 
 
@@ -235,7 +236,7 @@ intr_wrapper(void *data)
 		return B_UNHANDLED_INTERRUPT;
 
 	release_sem_etc(intr->sem, 1, B_DO_NOT_RESCHEDULE);
-	return B_INVOKE_SCHEDULER;
+	return intr->handling ? B_HANDLED_INTERRUPT : B_INVOKE_SCHEDULER;
 }
 
 
@@ -264,7 +265,9 @@ intr_handler(void *data)
 
 		//device_printf(intr->dev, "in soft interrupt handler.\n");
 
+		atomic_or(&intr->handling, 1);
 		intr->handler(intr->arg);
+		atomic_and(&intr->handling, 0);
 		HAIKU_REENABLE_INTERRUPTS(intr->dev);
 	}