From: Paul Cercueil <paul@crapouillou.net>
To: afzal mohammed <afzal.mohd.ma@gmail.com>
Cc: linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Jason Cooper <jason@lakedaemon.net>,
Marc Zyngier <maz@kernel.org>
Subject: Re: [PATCH 17/18] irqchip: Replace setup_irq() by request_irq()
Date: Thu, 13 Feb 2020 13:02:44 -0300 [thread overview]
Message-ID: <1581609764.3.2@crapouillou.net> (raw)
In-Reply-To: <8e00874d072f32496c2d0da05423bda1cadd6975.1581478324.git.afzal.mohd.ma@gmail. com>
Hi,
Le mer., févr. 12, 2020 at 13:35, afzal mohammed
<afzal.mohd.ma@gmail.com> a écrit :
> request_irq() is preferred over setup_irq(). Existing callers of
> setup_irq() reached mostly via 'init_IRQ()' & 'time_init()', while
> memory allocators are ready by 'mm_init()'.
>
> Per tglx[1], setup_irq() existed in olden days when allocators were
> not
> ready by the time early interrupts were initialized.
>
> Hence replace setup_irq() by request_irq().
>
> Seldom remove_irq() usage has been observed coupled with setup_irq(),
> wherever that has been found, it too has been replaced by free_irq().
>
> [1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos
>
> Signed-off-by: afzal mohammed <afzal.mohd.ma@gmail.com>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
> ---
>
> Since cc'ing cover letter to all maintainers/reviewers would be too
> many, refer for cover letter,
>
> https://lkml.kernel.org/r/cover.1581478323.git.afzal.mohd.ma@gmail.com
>
> drivers/irqchip/irq-i8259.c | 9 +++------
> drivers/irqchip/irq-ingenic.c | 11 +++++------
> 2 files changed, 8 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/irqchip/irq-i8259.c b/drivers/irqchip/irq-i8259.c
> index d000870d9b6b..e9798d02b256 100644
> --- a/drivers/irqchip/irq-i8259.c
> +++ b/drivers/irqchip/irq-i8259.c
> @@ -271,11 +271,6 @@ static void init_8259A(int auto_eoi)
> /*
> * IRQ2 is cascade interrupt to second interrupt controller
> */
> -static struct irqaction irq2 = {
> - .handler = no_action,
> - .name = "cascade",
> - .flags = IRQF_NO_THREAD,
> -};
>
> static struct resource pic1_io_resource = {
> .name = "pic1",
> @@ -323,7 +318,9 @@ struct irq_domain * __init
> __init_i8259_irqs(struct device_node *node)
> if (!domain)
> panic("Failed to add i8259 IRQ domain");
>
> - setup_irq(I8259A_IRQ_BASE + PIC_CASCADE_IR, &irq2);
> + if (request_irq(I8259A_IRQ_BASE + PIC_CASCADE_IR, no_action,
> + IRQF_NO_THREAD, "cascade", NULL))
> + pr_err("request_irq() on %s failed\n", "cascade");
> register_syscore_ops(&i8259_syscore_ops);
> return domain;
> }
> diff --git a/drivers/irqchip/irq-ingenic.c
> b/drivers/irqchip/irq-ingenic.c
> index c5589ee0dfb3..5b20a0f0ece8 100644
> --- a/drivers/irqchip/irq-ingenic.c
> +++ b/drivers/irqchip/irq-ingenic.c
> @@ -58,11 +58,6 @@ static irqreturn_t intc_cascade(int irq, void
> *data)
> return IRQ_HANDLED;
> }
>
> -static struct irqaction intc_cascade_action = {
> - .handler = intc_cascade,
> - .name = "SoC intc cascade interrupt",
> -};
> -
> static int __init ingenic_intc_of_init(struct device_node *node,
> unsigned num_chips)
> {
> @@ -130,7 +125,11 @@ static int __init ingenic_intc_of_init(struct
> device_node *node,
> irq_reg_writel(gc, IRQ_MSK(32), JZ_REG_INTC_SET_MASK);
> }
>
> - setup_irq(parent_irq, &intc_cascade_action);
> + if (request_irq(parent_irq, intc_cascade, 0,
> + "SoC intc cascade interrupt", NULL)) {
> + pr_err("request_irq() on %s failed\n",
> + "SoC intc cascade interrupt");
> + }
> return 0;
>
> out_domain_remove:
> --
> 2.24.1
>
next prev parent reply other threads:[~2020-02-13 16:03 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-12 8:01 [PATCH 00/18] genirq: Remove setup_irq() afzal mohammed
2020-02-12 8:02 ` [PATCH 01/18] alpha: replace setup_irq() by request_irq() afzal mohammed
2020-02-12 8:02 ` [PATCH 02/18] ARM: " afzal mohammed
2020-02-12 8:10 ` Viresh Kumar
2020-02-12 23:27 ` Alexander Sverdlin
2020-02-12 8:02 ` [PATCH 03/18] c6x: " afzal mohammed
2020-02-13 17:37 ` Mark Salter
2020-02-12 8:03 ` [PATCH 04/18] hexagon: " afzal mohammed
2020-02-12 8:03 ` [PATCH 05/18] ia64: " afzal mohammed
2020-02-12 8:03 ` [PATCH 06/18] m68k: Replace " afzal mohammed
2020-02-12 22:25 ` Finn Thain
2020-02-13 2:03 ` afzal mohammed
2020-02-13 7:11 ` Greg Ungerer
2020-02-14 13:07 ` afzal mohammed
2020-02-12 8:03 ` [PATCH 07/18] microblaze: " afzal mohammed
2020-02-12 8:04 ` [PATCH 08/18] MIPS: " afzal mohammed
2020-02-12 8:04 ` [PATCH 09/18] parisc: " afzal mohammed
2020-02-12 8:04 ` [PATCH 10/18] powerpc: " afzal mohammed
2020-02-13 10:59 ` Christophe Leroy
2020-02-12 8:04 ` [PATCH 11/18] s390: replace " afzal mohammed
2020-02-12 8:04 ` [PATCH 12/18] sh: " afzal mohammed
2020-02-12 8:05 ` [PATCH 13/18] unicore32: " afzal mohammed
2020-02-12 8:05 ` [PATCH 14/18] x86: Replace " afzal mohammed
2020-02-27 10:49 ` Thomas Gleixner
2020-02-27 11:36 ` afzal mohammed
2020-02-27 13:29 ` Thomas Gleixner
2020-02-27 14:26 ` afzal mohammed
2020-02-12 8:05 ` [PATCH 15/18] xtensa: replace " afzal mohammed
2020-02-12 9:10 ` Max Filippov
2020-02-12 8:05 ` [PATCH 16/18] clocksource: Replace " afzal mohammed
2020-02-20 11:13 ` Daniel Lezcano
2020-02-20 14:48 ` Linus Walleij
2020-02-12 8:05 ` [PATCH 17/18] irqchip: " afzal mohammed
[not found] ` <8e00874d072f32496c2d0da05423bda1cadd6975.1581478324.git.afzal.mohd.ma@gmail. com>
2020-02-13 16:02 ` Paul Cercueil [this message]
2020-02-12 8:06 ` [PATCH 18/18] genirq: Remove setup_irq() and remove_irq() afzal mohammed
2020-02-20 14:49 ` Linus Walleij
2020-02-27 10:31 ` [PATCH 00/18] genirq: Remove setup_irq() Thomas Gleixner
2020-02-27 11:07 ` afzal mohammed
2020-03-21 17:43 ` afzal mohammed
2020-03-27 16:08 ` [PATCH 0/6] Kill setup_irq() afzal mohammed
2020-03-27 16:09 ` [PATCH v5 1/6] alpha: Replace setup_irq() by request_irq() afzal mohammed
2020-03-27 16:09 ` [PATCH v5 2/6] c6x: replace " afzal mohammed
2020-03-27 16:09 ` [PATCH v5 3/6] hexagon: " afzal mohammed
2020-03-27 16:10 ` [PATCH v5 4/6] sh: " afzal mohammed
2020-03-27 16:10 ` [PATCH v5 5/6] unicore32: " afzal mohammed
2020-03-27 16:11 ` [PATCH v5 6/6] genirq: Remove setup_irq() and remove_irq() afzal mohammed
2020-04-11 14:10 ` afzal mohammed
2020-03-28 2:48 ` [PATCH 0/6] Kill setup_irq() Brian Cain
2020-03-28 7:32 ` afzal mohammed
2020-04-02 15:03 ` Brian Cain
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