lkml.org 
[lkml]   [2012]   [Apr]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v5 06/27] irq_domain/powerpc: eliminate irq_map; use irq_alloc_desc() instead
On Tue, 3 Apr 2012, Benjamin Herrenschmidt wrote:

> On Mon, 2012-04-02 at 22:52 +0200, Thomas Gleixner wrote:
> > > When I revert a09b659cd68c10ec6a30cb91ebd2c327fcd5bfe5 ("genirq: Fix
> > > long-term regression in genirq irq_set_irq_type() handling") on top
> > of
> > > 3.4-rc1 the sata irq errors disappear, but I see a lot of spurious
> >
> > Hmm. Which irq chip is handling the interrupt for that sata irq ?
>
> MPIC. The irq is a PCI IRQ, and so should be level-low, it should have
> been mapped by the PCI code using the of_* calls.

So it's covered by this section:

mpic_set_irq_type()

if (flow_type == IRQ_TYPE_NONE)
if (mpic->senses && src < mpic->senses_count)
flow_type = mpic->senses[src];
if (flow_type == IRQ_TYPE_NONE)
flow_type = IRQ_TYPE_LEVEL_LOW;

And with IRQ_TYPE_NONE this is always going to end up with
IRQ_TYPE_LEVEL_LOW simply because the only function which might set
mpic->senses is mpic_set_default_senses(). And this function does not
have a single caller .....

/me scratches head


\
 
 \ /
  Last update: 2012-04-02 23:29    [W:0.107 / U:1.740 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site