Re: [PATCH] libahci: ahci interrupt check for disabled port since private_data may be NULL

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On Thu, Apr 17, 2014 at 02:44:36PM +0200, Alexander Gordeev wrote:
> On Thu, Apr 17, 2014 at 09:29:42AM -0400, Tejun Heo wrote:
> > On Thu, Apr 17, 2014 at 10:29:35AM +0200, Alexander Gordeev wrote:
> > > diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
> > > index e45b18e..9f1169a 100644
> > > --- a/drivers/ata/ahci.c
> > > +++ b/drivers/ata/ahci.c
> > > @@ -1240,6 +1240,8 @@ int ahci_host_activate(struct ata_host *host, int irq, unsigned int n_msis)
> > >  						       irq + i, ahci_hw_interrupt,
> > >  						       ahci_thread_fn, IRQF_SHARED,
> > >  						       pp->irq_desc, host->ports[i]);
> > > +		else
> > > +			disable_irq(irq + i);
> > 
> > Hmmm?  Request failed.  Why would it require an explicit disable?
> 
> 	if (pp)
> 		rc = devm_request_threaded_irq(..., irq + i, ...)
> 	else
> 		disable_irq(irq + i);

Ah, was looking at the old code.  But again, we didn't even request
the irq, why would we disable it?

Thanks.

-- 
tejun
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