On Mon, 19 May 2014 14:57:39 +0200, Thierry Reding <thierry.reding@xxxxxxxxx> wrote:
> On Mon, May 19, 2014 at 04:30:59PM +0300, Grygorii Strashko wrote:
> [...]
> > diff --git a/drivers/of/irq.c b/drivers/of/irq.c
> [...]
> > /**
> > + * of_irq_get_byname - Decode a node's IRQ and return it as a Linux irq number
> > + * @dev: pointer to device tree node
> > + * @name: zero-based index of the irq
>
> This is a name, not an index.
>
> > + *
> > + * Returns Linux irq number on success, or -EPROBE_DEFER if the irq domain
> > + * is not yet created, or errorno in case of failure.
>
> s/errorno/error code/? Also EPROBE_DEFER is also an error code, so I'm
> not sure if it's worth a special case in the description here.
>
> > + *
> > + */
> > +int of_irq_get_byname(struct device_node *dev, const char *name)
> > +{
> > + const char *name_irq = NULL;
> > + int index = 0;
> > +
> > + if (unlikely(!name))
> > + return -EINVAL;
> > +
> > + while (!of_property_read_string_index(dev, "interrupt-names",
> > + index, &name_irq))
> > + if (!strcmp(name, name_irq))
> > + return of_irq_get(dev, index);
>
> Isn't this missing an index++ somewhere? Otherwise it seems like this
> would loop infinitely if there was no match on the first entry.
Better yet, use of_property_match_string().
g.
>
> Thierry
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