Messages in this thread |  | | | Date | Fri, 10 Aug 2012 10:19:02 +0200 | | Subject | Re: [PATCH v2] gpio: Add Avionic Design N-bit GPIO expander support | | From | Linus Walleij <> |
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On Thu, Aug 9, 2012 at 10:20 PM, Thierry Reding <thierry.reding@avionic-design.de> wrote: > On Sun, Jul 29, 2012 at 07:13:57PM +0200, Linus Walleij wrote: >> > + client->irq = irq_of_parse_and_map(client->dev.of_node, 0); >> > + if (client->irq == NO_IRQ) >> >> Just if (!client->irq) since NO_IRQ is 0 nowadays. > > At the risk of seeming pedantic, NO_IRQ is in fact quite often not 0.
No. A year back, yes, but not anymore. We went to great lengths in the ARM architecture to ensure NO_IRQ is *always 0. Russell spent a lot of time on this.
Consult the following article on LWN: http://lwn.net/Articles/470820/
Then grep your gitlog and you'll see we got rid of it from ARM.
If this driver is for some other arch like openrisc I might accept it but please reconsider.
Yours, Linus Walleij
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