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Date: Tue, 20 May 2014 13:42:24 +0300 From: Grygorii Strashko <grygorii.strashko@...com> To: Thierry Reding <thierry.reding@...il.com> CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Rob Herring <robh+dt@...nel.org>, Grant Likely <grant.likely@...aro.org>, <santosh.shilimkar@...com>, <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, Russell King <linux@....linux.org.uk>, Rob Herring <robh@...nel.org>, Tony Lindgren <tony@...mide.com> Subject: Re: [RFC PATCH] of/irq: do irq resolution in platform_get_irq_byname() Hi Thierry, On 05/19/2014 03:57 PM, Thierry Reding 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. >From my experience, It's very useful to know that function can return EPROBE_DEFER, otherwise, the code need to be traced till place where EPROBE_DEFER is returned. > >> + * >> + */ >> +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. Omg. You're right. It was bad day ( Thanks for your review. Patch re-sent. Regards, -grygorii -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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