On Sat, May 12, 2012 at 02:36:42PM +0200, walter harms wrote:
>
>
> Am 12.05.2012 12:59, schrieb Dan Carpenter:
> > fault_reason == ARRAY_SIZE(irq_remap_fault_reasons) + 0x20 - 0x20 is one
> > past the end of the array.
> >
> > Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> >
> > diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
> > index 5ef65cf..9390f3f 100644
> > --- a/drivers/iommu/dmar.c
> > +++ b/drivers/iommu/dmar.c
> > @@ -1057,7 +1057,7 @@ static const char *irq_remap_fault_reasons[] =
> >
> > const char *dmar_get_fault_reason(u8 fault_reason, int *fault_type)
> > {
> > - if (fault_reason >= 0x20 && (fault_reason <= 0x20 +
> > + if (fault_reason >= 0x20 && (fault_reason < 0x20 +
> > ARRAY_SIZE(irq_remap_fault_reasons))) {
> > *fault_type = INTR_REMAP;
> > return irq_remap_fault_reasons[fault_reason - 0x20];
>
> perhaps this is more readable:
> if (fault_reason >= 0x20 && (fault_reason - 0x20 < ARRAY_SIZE(irq_remap_fault_reasons)))
>
Yeah. Probably you're way is nicer.
regards,
dan carpenter
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