From: Sergey Shtylyov <s.shtylyov@omp.ru>
To: "Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
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Subject: Re: [PATCH] driver core: platform: Rename platform_get_irq_optional() to platform_get_irq_silent()
Date: Tue, 25 Jan 2022 00:02:06 +0300 [thread overview]
Message-ID: <15796e57-f7d4-9c66-3b53-0b026eaf31d8@omp.ru> (raw)
In-Reply-To: <Ye6/NgfxsZnpXE09@smile.fi.intel.com>
Hello!
On 1/24/22 6:01 PM, Andy Shevchenko wrote:
>>>>>>> It'd certainly be good to name anything that doesn't correspond to one
>>>>>>> of the existing semantics for the API (!) something different rather
>>>>>>> than adding yet another potentially overloaded meaning.
>>>>>>
>>>>>> It seems we're (at least) three who agree about this. Here is a patch
>>>>>> fixing the name.
>>>>>
>>>>> And similar number of people are on the other side.
>>>>
>>>> If someone already opposed to the renaming (and not only the name) I
>>>> must have missed that.
>>>>
>>>> So you think it's a good idea to keep the name
>>>> platform_get_irq_optional() despite the "not found" value returned by it
>>>> isn't usable as if it were a normal irq number?
>>>
>>> I meant that on the other side people who are in favour of Sergey's patch.
>>> Since that I commented already that I opposed the renaming being a standalone
>>> change.
>>>
>>> Do you agree that we have several issues with platform_get_irq*() APIs?
[...]
>>> 2. The vIRQ0 handling: a) WARN() followed by b) returned value 0
>>
>> I'm happy with the vIRQ0 handling. Today platform_get_irq() and it's
>> silent variant returns either a valid and usuable irq number or a
>> negative error value. That's totally fine.
>
> It might return 0.
> Actually it seems that the WARN() can only be issued in two cases:
> - SPARC with vIRQ0 in one of the array member
> - fallback to ACPI for GPIO IRQ resource with index 0
You have probably missed the recent discovery that arch/sh/boards/board-aps4*.c
causes IRQ0 to be passed as a direct IRQ resource?
> But the latter is bogus, because it would mean a bug in the ACPI code.
Worth changing >= 0 to > 0 there, maybe?
> The bottom line here is the SPARC case. Anybody familiar with the platform
> can shed a light on this. If there is no such case, we may remove warning
> along with ret = 0 case from platfrom_get_irq().
I'm afraid you're too fast here... :-)
We'll have a really hard time if we continue to allow IRQ0 to be returned by
platform_get_irq() -- we'll have oto fileter it out in the callers then...
>>> 3. The specific cookie for "IRQ not found, while no error happened" case
>>
>> Not sure what you mean here. I have no problem that a situation I can
>> cope with is called an error for the query function. I just do error
>> handling and continue happily. So the part "while no error happened" is
>> irrelevant to me.
>
> I meant that instead of using special error code, 0 is very much good for
> the cases when IRQ is not found. It allows to distinguish -ENXIO from the
> low layer from -ENXIO with this magic meaning.
I don't see how -ENXIO can trickle from the lower layers, frankly...
[...]
MBR, Sergey
next prev parent reply other threads:[~2022-01-24 21:14 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20220110195449.12448-1-s.shtylyov@omp.ru>
2022-01-10 19:54 ` [PATCH 1/2] platform: make platform_get_irq_optional() optional Sergey Shtylyov
2022-01-10 20:10 ` Uwe Kleine-König
2022-01-10 21:07 ` Andy Shevchenko
2022-01-10 21:44 ` Uwe Kleine-König
2022-01-10 21:18 ` Andrew Lunn
2022-01-12 8:33 ` Geert Uytterhoeven
2022-01-12 8:50 ` Uwe Kleine-König
2022-01-12 10:27 ` Geert Uytterhoeven
2022-01-12 12:27 ` Andy Shevchenko
2022-01-12 13:38 ` Andrew Lunn
2022-01-12 13:51 ` Andy Shevchenko
2022-01-12 13:54 ` Geert Uytterhoeven
2022-01-12 14:41 ` Rafael J. Wysocki
2022-01-12 15:05 ` Sergey Shtylyov
2022-01-12 15:13 ` Hans de Goede
2022-01-12 15:48 ` Rafael J. Wysocki
2022-01-12 16:21 ` Andy Shevchenko
2022-01-12 21:31 ` Uwe Kleine-König
2022-01-12 21:45 ` Mark Brown
2022-01-13 11:08 ` Uwe Kleine-König
2022-01-13 14:45 ` Mark Brown
2022-01-13 19:43 ` [PATCH] driver core: platform: Rename platform_get_irq_optional() to platform_get_irq_silent() Uwe Kleine-König
2022-01-13 20:17 ` Mark Brown
2022-01-13 20:57 ` Sergey Shtylyov
2022-01-13 22:43 ` Uwe Kleine-König
2022-01-14 9:58 ` Geert Uytterhoeven
2022-01-15 15:21 ` Uwe Kleine-König
2022-01-15 21:06 ` Sergey Shtylyov
2022-01-14 11:34 ` Sergey Shtylyov
2022-01-13 20:31 ` Guenter Roeck
2022-01-13 21:42 ` Florian Fainelli
2022-01-13 23:06 ` Uwe Kleine-König
2022-01-14 17:55 ` Sergey Shtylyov
2022-01-15 13:55 ` Uwe Kleine-König
2022-01-19 18:36 ` Andy Shevchenko
2022-01-19 19:44 ` Sergey Shtylyov
2022-01-19 18:40 ` Andy Shevchenko
2022-01-14 6:57 ` Peter Korsgaard
2022-01-14 13:04 ` Andy Shevchenko
2022-01-15 15:45 ` Uwe Kleine-König
2022-01-19 18:51 ` Andy Shevchenko
2022-01-19 19:47 ` Sergey Shtylyov
2022-01-19 20:55 ` Andy Shevchenko
2022-01-20 7:57 ` Uwe Kleine-König
2022-01-24 15:01 ` Andy Shevchenko
2022-01-24 21:02 ` Sergey Shtylyov [this message]
2022-01-25 8:25 ` Geert Uytterhoeven
2022-01-25 12:56 ` Matthias Schiffer
2022-01-25 14:01 ` Andy Shevchenko
2022-01-14 19:45 ` Sergey Shtylyov
2022-01-14 20:29 ` Uwe Kleine-König
2022-01-15 13:08 ` Sergey Shtylyov
2022-01-19 18:52 ` Andy Shevchenko
2022-01-13 20:35 ` [PATCH 1/2] platform: make platform_get_irq_optional() optional Sergey Shtylyov
2022-01-14 9:25 ` Uwe Kleine-König
2022-01-14 9:39 ` Geert Uytterhoeven
2022-01-14 19:14 ` Sergey Shtylyov
2022-01-14 20:22 ` Uwe Kleine-König
2022-01-15 20:22 ` Sergey Shtylyov
2022-01-17 8:41 ` Geert Uytterhoeven
2022-01-17 9:24 ` Uwe Kleine-König
2022-01-17 10:35 ` Geert Uytterhoeven
2022-01-17 11:49 ` Uwe Kleine-König
2022-01-17 13:08 ` Geert Uytterhoeven
2022-01-17 17:06 ` Uwe Kleine-König
2022-01-18 8:25 ` Geert Uytterhoeven
2022-01-18 9:09 ` Uwe Kleine-König
2022-01-18 9:37 ` Geert Uytterhoeven
2022-01-18 12:08 ` Uwe Kleine-König
2022-01-18 12:49 ` Geert Uytterhoeven
2022-01-18 14:29 ` Uwe Kleine-König
2022-01-19 16:12 ` Sergey Shtylyov
2022-01-19 18:29 ` Sergey Shtylyov
2022-01-20 11:27 ` Sergey Shtylyov
2022-01-16 18:15 ` Sergey Shtylyov
2022-01-17 8:47 ` Uwe Kleine-König
2022-01-18 20:21 ` Sergey Shtylyov
2022-01-18 22:26 ` Uwe Kleine-König
2022-01-19 15:34 ` Sergey Shtylyov
2022-01-19 18:58 ` Andy Shevchenko
2022-01-19 19:49 ` Sergey Shtylyov
2022-01-14 18:46 ` Sergey Shtylyov
2022-01-15 18:36 ` [PATCH 1/2] platform: make platform_get_irq_optional() optional (summary) Uwe Kleine-König
2022-01-16 14:19 ` Greg Kroah-Hartman
2022-01-18 9:18 ` Uwe Kleine-König
2022-01-18 9:32 ` Greg Kroah-Hartman
2022-01-19 10:56 ` Sergey Shtylyov
2022-01-19 11:33 ` Uwe Kleine-König
2022-01-19 11:42 ` Sergey Shtylyov
2022-01-19 19:06 ` Andy Shevchenko
2022-01-17 11:57 ` [PATCH 1/2] platform: make platform_get_irq_optional() optional Sergey Shtylyov
2022-01-19 15:02 ` Uwe Kleine-König
2022-01-19 15:50 ` Sergey Shtylyov
2022-01-10 19:54 ` [PATCH 2/2] platform: make platform_get_irq_byname_optional() optional Sergey Shtylyov
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