Hi there,
I have a problem with queue_task() and mark_bh().
In a driver for the wireless HERMES-II chipset I found the code snippets
/* Register the ISR handler information here... */
lp->task.routine = (void (*)(void *))wl_isr_handler;
lp->task.data = lp;
printk("wl_isr_handler is @ %#lx\n", lp->task.routine);
At a later point (namely in the interrupt service rountine this happens:
/* If we have interrupts pending, then put them on a system task queue.*/
if( events == HCF_INT_PENDING ) {
/* Schedule the ISR handler as a bottom-half task in the
* tq_immediate queue
*/
printk( "Schedule the ISR handler %#lx...\n", lp->task.routine);
queue_task( &( lp->task ), &tq_immediate );
mark_bh( IMMEDIATE_BH );
}
The problem is now that the queued task lp->task (i.e. wl_isr_handler) never
get's called! And thus the driver does not work.
If I call the function directly using
lp->task.routine(lp);
instead of queue_task() and mark_bh() the function wl_isr_handler() gets
called and the driver works.
Any idea why queue_task() and mark_bh() do not work as expected?
How could I debug this problem?
(The two printk's show the same address.)
I am using linuxppc-2.4.25 from DENX CVS.
Thanks a million!!!
--
Steven Scholz
imc Measurement & Control imc Me?systeme GmbH
Voltastr. 5 Voltastr. 5
13355 Berlin 13355 Berlin
Germany Deutschland
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