Re: [PATCH v2 2/2] PCI: hv: Refactor hv_irq_unmask() to use cpumask_to_vpset()

[Maya Nakamura <m.maya.nakamura@gmail.com>]

On Sun, Jan 27, 2019 at 05:22:06AM +0000, Michael Kelley wrote:
> From: Maya Nakamura <m.maya.nakamura@gmail.com>  Sent: Saturday, January 26, 2019 12:55 AM
> >
> > @@ -953,29 +951,27 @@ static void hv_irq_unmask(struct irq_data *data)
> >  		 */
> >  		params->int_target.flags |=
> >  			HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET;
> > -		params->int_target.vp_set.valid_bank_mask =
> > -			(1ull << HV_VP_SET_BANK_COUNT_MAX) - 1;
> > +
> > +		if (!alloc_cpumask_var(&tmp, GFP_KERNEL)) {
> > +			res = 1;
> > +			goto exit_unlock;
> > +		}
> > +
> > +		cpumask_and(tmp, dest, cpu_online_mask);
> > +		nr_bank = cpumask_to_vpset(&params->int_target.vp_set, tmp);
> > +		free_cpumask_var(tmp);
> > +
> > +		if (!nr_bank) {
> 
> There are two failures cases in cpumask_to_vpset().  One case returns
> 0, and the other case returns -1.  The above test only catches the 0
> failure case.  Need to modify the test to catch both cases.
> 
> Michael
> 
Thank you for your feedback. I will correct it in v3.

Maya

> > +			res = 1;
> > +			goto exit_unlock;
> > +		}
> > 
>