From: Pawel Moll <pawel.moll@arm.com>
To: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: "devicetree-discuss@lists.ozlabs.org"
<devicetree-discuss@lists.ozlabs.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v5 5/9] ARM: versatile: Map local timers using Device Tree when possible
Date: Mon, 12 Dec 2011 11:29:20 +0000 [thread overview]
Message-ID: <1323689360.2391.15.camel@hornet.cambridge.arm.com> (raw)
In-Reply-To: <4EE5E302.8070301@ru.mvista.com>
On Mon, 2011-12-12 at 11:18 +0000, Sergei Shtylyov wrote:
> I think if of_iomap() fails, it's because the system is out of memory, so
> -ENOMEM seems more proper error in this case. Although... it's not the only
> case when of_iomap() fails.
I actually think that in this use case it's much more likely that
of_iomap() returns NULL because of_address_to_resource() fails:
void __iomem *of_iomap(struct device_node *np, int index)
{
struct resource res;
if (of_address_to_resource(np, index, &res))
return NULL;
and this will - again most likely - happen when np == NULL (so
of_find_compatible_node() returns nothing). That's what makes ENXIO look
good to me there...
Cheers!
Paweł
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next prev parent reply other threads:[~2011-12-12 11:29 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-09 19:03 [PATCH v5 0/9] Versatile Express DT support Pawel Moll
2011-12-09 19:03 ` [PATCH v5 1/9] ARM: versatile: Add missing ENDPROC to headsmp.S Pawel Moll
2011-12-09 19:03 ` [PATCH v5 2/9] ARM: vexpress: Get rid of MMIO_P2V Pawel Moll
2011-12-09 19:03 ` [PATCH v5 3/9] ARM: vexpress: Add Device Tree support Pawel Moll
2011-12-09 19:03 ` [PATCH v5 4/9] ARM: vexpress: Motherboard RS1 memory map support Pawel Moll
2011-12-09 19:03 ` [PATCH v5 5/9] ARM: versatile: Map local timers using Device Tree when possible Pawel Moll
2011-12-10 15:27 ` Sergei Shtylyov
2011-12-12 11:03 ` Pawel Moll
[not found] ` <1323687811.2391.3.camel-okZbbLrgpR/YkXV2EHHjLW3o5bpOHsLO@public.gmane.org>
2011-12-12 11:18 ` Sergei Shtylyov
2011-12-12 11:29 ` Pawel Moll [this message]
[not found] ` <1323457432-4800-6-git-send-email-pawel.moll-5wv7dgnIgG8@public.gmane.org>
2011-12-12 14:04 ` Russell King - ARM Linux
2011-12-12 14:06 ` Pawel Moll
2011-12-09 19:03 ` [PATCH v5 6/9] ARM: vexpress: Use FDT data in platform SMP calls Pawel Moll
2011-12-09 19:03 ` [PATCH v5 7/9] ARM: vexpress: Add Device Tree for V2P-CA5s core tile Pawel Moll
2011-12-09 19:03 ` [PATCH v5 8/9] ARM: vexpress: Add Device Tree for V2P-CA9 " Pawel Moll
2011-12-09 19:03 ` [PATCH v5 9/9] ARM: vexpress: Add Device Tree for V2P-CA15 core tile (TC1 variant) Pawel Moll
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