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From: Marc Zyngier <maz@kernel.org>
To: Hector Martin <marcan@marcan.st>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Rob Herring <robh+dt@kernel.org>, Sven Peter <sven@svenpeter.dev>,
	Alyssa Rosenzweig <alyssa@rosenzweig.io>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org
Subject: Re: [PATCH 4/6] irqchip/apple-aic: Dynamically compute register offsets
Date: Sun, 12 Dec 2021 18:26:58 +0000	[thread overview]
Message-ID: <87pmq1u1al.wl-maz@kernel.org> (raw)
In-Reply-To: <20211209043249.65474-5-marcan@marcan.st>

On Thu, 09 Dec 2021 04:32:47 +0000,
Hector Martin <marcan@marcan.st> wrote:
> 
> This allows us to support AIC variants with different numbers of IRQs
> based on capability registers.
> 
> Signed-off-by: Hector Martin <marcan@marcan.st>
> ---
>  drivers/irqchip/irq-apple-aic.c | 73 +++++++++++++++++++++++++--------
>  1 file changed, 56 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
> index 572d1af175fc..d03caed51d56 100644
> --- a/drivers/irqchip/irq-apple-aic.c
> +++ b/drivers/irqchip/irq-apple-aic.c
> @@ -312,12 +326,15 @@ static int aic_irq_set_affinity(struct irq_data *d,
>  	struct aic_irq_chip *ic = irq_data_get_irq_chip_data(d);
>  	int cpu;
>  
> +	if (!ic->info.target_cpu)
> +		return -EINVAL;

Can this even happen? And if it did, this should scream loudly,
shouldn't it?

	M.

-- 
Without deviation from the norm, progress is not possible.

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WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <maz@kernel.org>
To: Hector Martin <marcan@marcan.st>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Rob Herring <robh+dt@kernel.org>, Sven Peter <sven@svenpeter.dev>,
	Alyssa Rosenzweig <alyssa@rosenzweig.io>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org
Subject: Re: [PATCH 4/6] irqchip/apple-aic: Dynamically compute register offsets
Date: Sun, 12 Dec 2021 18:26:58 +0000	[thread overview]
Message-ID: <87pmq1u1al.wl-maz@kernel.org> (raw)
In-Reply-To: <20211209043249.65474-5-marcan@marcan.st>

On Thu, 09 Dec 2021 04:32:47 +0000,
Hector Martin <marcan@marcan.st> wrote:
> 
> This allows us to support AIC variants with different numbers of IRQs
> based on capability registers.
> 
> Signed-off-by: Hector Martin <marcan@marcan.st>
> ---
>  drivers/irqchip/irq-apple-aic.c | 73 +++++++++++++++++++++++++--------
>  1 file changed, 56 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
> index 572d1af175fc..d03caed51d56 100644
> --- a/drivers/irqchip/irq-apple-aic.c
> +++ b/drivers/irqchip/irq-apple-aic.c
> @@ -312,12 +326,15 @@ static int aic_irq_set_affinity(struct irq_data *d,
>  	struct aic_irq_chip *ic = irq_data_get_irq_chip_data(d);
>  	int cpu;
>  
> +	if (!ic->info.target_cpu)
> +		return -EINVAL;

Can this even happen? And if it did, this should scream loudly,
shouldn't it?

	M.

-- 
Without deviation from the norm, progress is not possible.

  reply	other threads:[~2021-12-12 18:28 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-09  4:32 [PATCH 0/6] irqchip/apple-aic: Add support for AICv2 Hector Martin
2021-12-09  4:32 ` Hector Martin
2021-12-09  4:32 ` [PATCH 1/6] dt-bindings: interrupt-controller: apple, aic: Add apple, aic2 support Hector Martin
2021-12-09  4:32   ` [PATCH 1/6] dt-bindings: interrupt-controller: apple,aic: Add apple,aic2 support Hector Martin
2021-12-09 17:28   ` Rob Herring
2021-12-09 17:28     ` Rob Herring
2021-12-11 12:28     ` Hector Martin
2021-12-11 12:28       ` Hector Martin
2021-12-11 12:44       ` [PATCH 1/6] dt-bindings: interrupt-controller: apple, aic: Add apple, aic2 support Marc Zyngier
2021-12-11 12:44         ` [PATCH 1/6] dt-bindings: interrupt-controller: apple,aic: Add apple,aic2 support Marc Zyngier
2021-12-11 12:52         ` Hector Martin
2021-12-11 12:52           ` Hector Martin
2021-12-11 12:49       ` Mark Kettenis
2021-12-11 12:49         ` Mark Kettenis
2021-12-09  4:32 ` [PATCH 2/6] irqchip/apple-aic: Add Fast IPI support Hector Martin
2021-12-09  4:32   ` Hector Martin
2021-12-12 12:21   ` Marc Zyngier
2021-12-12 12:21     ` Marc Zyngier
2021-12-18  5:31     ` Hector Martin
2021-12-18  5:31       ` Hector Martin
2021-12-20 12:43       ` Marc Zyngier
2021-12-20 12:43         ` Marc Zyngier
2021-12-09  4:32 ` [PATCH 3/6] irqchip/apple-aic: Switch to irq_domain_create_tree and sparse hwirqs Hector Martin
2021-12-09  4:32   ` Hector Martin
2021-12-12 14:37   ` Marc Zyngier
2021-12-12 14:37     ` Marc Zyngier
2021-12-18  5:36     ` Hector Martin
2021-12-18  5:36       ` Hector Martin
2021-12-09  4:32 ` [PATCH 4/6] irqchip/apple-aic: Dynamically compute register offsets Hector Martin
2021-12-09  4:32   ` Hector Martin
2021-12-12 18:26   ` Marc Zyngier [this message]
2021-12-12 18:26     ` Marc Zyngier
2021-12-18  5:37     ` Hector Martin
2021-12-18  5:37       ` Hector Martin
2021-12-09  4:32 ` [PATCH 5/6] irqchip/apple-aic: Support multiple dies Hector Martin
2021-12-09  4:32   ` Hector Martin
2021-12-13 16:10   ` Marc Zyngier
2021-12-13 16:10     ` Marc Zyngier
2021-12-18  5:39     ` Hector Martin
2021-12-18  5:39       ` Hector Martin
2021-12-20 13:38       ` Marc Zyngier
2021-12-20 13:38         ` Marc Zyngier
2021-12-09  4:32 ` [PATCH 6/6] irqchip/apple-aic: Add support for AICv2 Hector Martin
2021-12-09  4:32   ` Hector Martin
2021-12-12 18:47   ` Marc Zyngier
2021-12-12 18:47     ` Marc Zyngier
2021-12-18  6:02     ` Hector Martin
2021-12-18  6:02       ` Hector Martin
2021-12-20 13:52       ` Marc Zyngier
2021-12-20 13:52         ` Marc Zyngier

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