[PATCH 4/9] iommu/arm-smmu: Check for num_context_irqs > 0 to avoid divide by zero exception

[Will Deacon]

On Fri, Sep 27, 2013 at 11:39:49AM +0100, Andreas Herrmann wrote:
> On Fri, Sep 27, 2013 at 06:23:07AM -0400, Will Deacon wrote:
> > What do you think?
> 
> Yes, that should suffice.
> 
> I know it's clear for us but what about a short comment to emphasize
> that we expect to find at least one context irq?
> 
> -       if (num_irqs < smmu->num_global_irqs) {
> +       /* expect num_global_irqs plus at least one context irq */
> +       if (num_irqs <= smmu->num_global_irqs) {
> 
> which can be translated to
> 
> -       if (num_irqs < smmu->num_global_irqs) {
> +       if (!smmu->num_context_irqs) {

Even better! Do you want to send a patch, or shall I just create one myself?

Will