A bit more info: Interrupt numbers are 0x15 (txeob) and 0x16 (rxeob).
I've added some printk, and at the point where the DHCP message is sent
out, I get:
DHCP: sending class identifier "hydra_temp"
stalled stage <- printed in __ipipe_walk_pipeline
(see below)
__ipipe_grab_irq 15 <- printed at the beginning of
__ipipe_grab_irq
ready to walk 15 <- printed at the finalize:, before
__ipipe_walk_pipeline is called
stalled stage <- printed in __ipipe_walk_pipeline
(see below)
__ipipe_grab_irq 16 <- printed at the beginning of
__ipipe_grab_irq
ready to walk 16 <- printed at the finalize:, before
__ipipe_walk_pipeline is called
stalled stage <- see below
stalled stage <- etc
ipipe_cpudom_var != 0
next_domain == this_domain
stalled stage
So, while I don't pretend to understand this yet, it looks like the
interrupts are coming into ipipe, but perhaps not getting delivered for
some reason?
Steve
void __ipipe_walk_pipeline(struct list_head *pos)
{
struct ipipe_domain *this_domain = ipipe_current_domain, *next_domain;
while (pos != &__ipipe_pipeline) {
next_domain = list_entry(pos, struct ipipe_domain, p_link);
if (test_bit(IPIPE_STALL_FLAG, &ipipe_cpudom_var(next_domain,
status))) {
printk("stalled stage\n");
break; /* Stalled stage -- do not go further. */
}
if (ipipe_cpudom_var(next_domain, irqpend_himask) != 0) {
printk("ipipe_cpudom_var != 0\n");
if (next_domain == this_domain) {
printk("next_domain == this_domain\n");
__ipipe_sync_pipeline(IPIPE_IRQMASK_ANY);
} else {
printk("next_domain != this_domain\n");
ipipe_cpudom_var(this_domain, evsync) = 0;
ipipe_current_domain = next_domain;
ipipe_suspend_domain(); /* Sync stage and propagate
interrupts. */
if (ipipe_current_domain == next_domain)
ipipe_current_domain = this_domain;
/*
* Otherwise, something changed the current domain under our
* feet recycling the register set; do not override the new
* domain.
*/
if (ipipe_cpudom_var(this_domain, irqpend_himask) != 0 &&
!test_bit(IPIPE_STALL_FLAG,
&ipipe_cpudom_var(this_domain, status))) {
printk("recycling the register set\n");
__ipipe_sync_pipeline(IPIPE_IRQMASK_ANY);
}
}
break;
} else if (next_domain == this_domain) {
printk("ipipe_cpudom_var == 0\n");
printk("next_domain == this_domain\n");
break;
}
pos = next_domain->p_link.next;
}
}
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