From: Marc Zyngier <marc.zyngier@arm.com>
To: Sekhar Nori <nsekhar@ti.com>
Cc: David Lechner <david@lechnology.com>,
Kevin Hilman <khilman@kernel.org>,
Bartosz Golaszewski <brgl@bgdev.pl>,
linux-kernel@vger.kernel.org,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-arm-kernel@lists.infradead.org,
Jason Cooper <jason@lakedaemon.net>
Subject: Re: [RESEND PATCH v2 17/33] ARM: davinci: aintc: move timer-specific irq_set_handler() out of irq.c
Date: Thu, 14 Feb 2019 10:55:15 +0000 [thread overview]
Message-ID: <86o97eskq4.wl-marc.zyngier@arm.com> (raw)
In-Reply-To: <a852c17c-786a-c568-5736-789901926f42@ti.com>
On Tue, 12 Feb 2019 05:51:11 +0000,
Sekhar Nori <nsekhar@ti.com> wrote:
>
> On 11/02/19 6:30 PM, Marc Zyngier wrote:
> > On 11/02/2019 12:25, Bartosz Golaszewski wrote:
>
> >> + /*
> >> + * Nobody knows why anymore, but this interrupt has been handled as
> >> + * a level irq from the very beginning of davinci support in mainline
> >> + * linux.
> >> + */
> >> + irq_set_handler(DAVINCI_INTC_IRQ(IRQ_TINT1_TINT34), handle_level_irq);
> >> +
> >
> > Now, the real question is: why isn't that set as part of the
> > set_irq_type() callback, instead of hardcoding it in the platform?
> >
> > This is exactly the kind of information that should come as part of the
> > DT or from the driver as one of the request_irq() flags.
> >
> > It would save quite a bit of boilerplate code.
>
> True, but I would keep this series feature/bug compatible with existing
> code. Without that, tracking regression reports will be a nightmare. Its
> a pretty major change already.
>
> We can (and should) fix this, but I prefer thats done as follow-up patch
> after this series is merged. That way a revert is easy.
And I'd rather see it done already, as a preliminary to this
series. If I'm going to take 35 patches that are mostly churn, surely
we can another couple to fix something that is a real bug.
> BTW, I don't quite see which in-kernel module uses this interrupt. It
> might be some out-of-tree code, or some code that since got removed from
> kernel.
Yet another reason to fix it now.
Thanks,
M.
--
Jazz is not dead, it just smell funny.
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next prev parent reply other threads:[~2019-02-14 10:55 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-11 12:25 [RESEND PATCH v2 00/33] ARM: davinci: modernize the irq support Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 01/33] ARM: davinci: remove intc_host_map from davinci_soc_info struct Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 02/33] ARM: davinci: aintc: use irq domain Bartosz Golaszewski
2019-02-12 8:26 ` Sekhar Nori
2019-02-11 12:25 ` [RESEND PATCH v2 03/33] ARM: davinci: select GENERIC_IRQ_MULTI_HANDLER Bartosz Golaszewski
2019-02-11 12:50 ` Marc Zyngier
2019-02-11 13:08 ` Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 04/33] ARM: davinci: remove davinci_intc_type Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 05/33] ARM: davinci: pull davinci_intc_base into the respective intc drivers Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 06/33] ARM: davinci: wrap HW interrupt numbers with a macro Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 07/33] ARM: davinci: select SPARSE_IRQ Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 08/33] ARM: davinci: make irqs.h a local header Bartosz Golaszewski
2019-02-12 8:31 ` Sekhar Nori
2019-02-11 12:25 ` [RESEND PATCH v2 09/33] ARM: davinci: aintc: drop GPL license boilerplate Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 10/33] ARM: davinci: aintc: wrap davinci_irq_init() with a helper Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 11/33] ARM: davinci: aintc: use a common prefix for symbols in the driver Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 12/33] ARM: davinci: aintc: drop the 00 prefix from register offsets Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 13/33] ARM: davinci: aintc: use readl/writel_relaxed() Bartosz Golaszewski
2019-02-11 12:54 ` Marc Zyngier
2019-02-11 12:25 ` [RESEND PATCH v2 14/33] irqchip: davinci-aintc: add a new config structure Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 15/33] ARM: davinci: aintc: use the new irqchip config structure in dm* SoCs Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 16/33] ARM: davinci: aintc: use the new config structure Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 17/33] ARM: davinci: aintc: move timer-specific irq_set_handler() out of irq.c Bartosz Golaszewski
2019-02-11 13:00 ` Marc Zyngier
2019-02-12 5:51 ` Sekhar Nori
2019-02-14 10:55 ` Marc Zyngier [this message]
2019-02-11 12:25 ` [RESEND PATCH v2 18/33] ARM: davinci: aintc: remove unnecessary includes Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 19/33] irqchip: davinci-aintc: move the driver to drivers/irqchip Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 20/33] ARM: davinci: cp-intc: remove cp_intc.h Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 21/33] ARM: davinci: cp-intc: add a wrapper around cp_intc_init() Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 22/33] irqchip: davinci-cp-intc: add a new config structure Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 23/33] ARM: davinci: cp-intc: add the new config structures for da8xx SoCs Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 24/33] ARM: davinci: cp-intc: use a common prefix for all symbols Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 25/33] ARM: davinci: cp-intc: convert all hex numbers to lowercase Bartosz Golaszewski
2019-02-11 12:25 ` [RESEND PATCH v2 26/33] ARM: davinci: cp-intc: use the new-style config structure Bartosz Golaszewski
2019-02-11 12:26 ` [RESEND PATCH v2 27/33] ARM: davinci: cp-intc: improve coding style Bartosz Golaszewski
2019-02-11 12:26 ` [RESEND PATCH v2 28/33] ARM: davinci: cp-intc: unify error handling Bartosz Golaszewski
2019-02-11 13:07 ` Marc Zyngier
2019-02-11 13:10 ` Bartosz Golaszewski
2019-02-11 13:20 ` Marc Zyngier
2019-02-11 12:26 ` [RESEND PATCH v2 29/33] ARM: davinci: cp-intc: use readl/writel_relaxed() Bartosz Golaszewski
2019-02-11 13:08 ` Marc Zyngier
2019-02-12 9:32 ` Bartosz Golaszewski
2019-02-11 12:26 ` [RESEND PATCH v2 30/33] ARM: davinci: cp-intc: drop GPL license boilerplate Bartosz Golaszewski
2019-02-11 12:26 ` [RESEND PATCH v2 31/33] ARM: davinci: cp-intc: remove redundant comments Bartosz Golaszewski
2019-02-11 12:26 ` [RESEND PATCH v2 32/33] irqchip: davinci-cp-intc: move the driver to drivers/irqchip Bartosz Golaszewski
2019-02-11 12:26 ` [RESEND PATCH v2 33/33] ARM: davinci: remove intc related fields from davinci_soc_info Bartosz Golaszewski
2019-02-12 8:24 ` [RESEND PATCH v2 00/33] ARM: davinci: modernize the irq support Sekhar Nori
2019-02-12 8:31 ` Bartosz Golaszewski
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