linux-kernel - Re: [RESEND PATCH v2 28/33] ARM: davinci: cp-intc: unify error handling

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Date:   Mon, 11 Feb 2019 13:07:56 +0000
From:   Marc Zyngier <marc.zyngier@....com>
To:     Bartosz Golaszewski <brgl@...ev.pl>, Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        David Lechner <david@...hnology.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [RESEND PATCH v2 28/33] ARM: davinci: cp-intc: unify error
 handling

On 11/02/2019 12:26, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> Use WARN_ON() on eny error in cp-intc initialization and drop all
> custom error messages.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> Reviewed-by: David Lechner <david@...hnology.com>
> ---
>  arch/arm/mach-davinci/cp_intc.c | 10 +++-------
>  1 file changed, 3 insertions(+), 7 deletions(-)
> 
> diff --git a/arch/arm/mach-davinci/cp_intc.c b/arch/arm/mach-davinci/cp_intc.c
> index f3787ae4cdbd..c1efb9390655 100644
> --- a/arch/arm/mach-davinci/cp_intc.c
> +++ b/arch/arm/mach-davinci/cp_intc.c
> @@ -200,20 +200,16 @@ davinci_cp_intc_do_init(const struct davinci_cp_intc_config *config,
>  			DAVINCI_CP_INTC_CHAN_MAP(offset));
>  
>  	irq_base = irq_alloc_descs(-1, 0, config->num_irqs, 0);
> -	if (irq_base < 0) {
> -		pr_warn("Couldn't allocate IRQ numbers\n");
> -		irq_base = 0;
> -	}
> +	if (WARN_ON(irq_base < 0))
> +		return irq_base;
>  
>  	/* create a legacy host */
>  	davinci_cp_intc_irq_domain = irq_domain_add_legacy(
>  					node, config->num_irqs, irq_base, 0,
>  					&davinci_cp_intc_irq_domain_ops, NULL);
>  
> -	if (!davinci_cp_intc_irq_domain) {
> -		pr_err("cp_intc: failed to allocate irq host!\n");
> +	if (WARN_ON(!davinci_cp_intc_irq_domain))
>  		return -EINVAL;
> -	}
>  
>  	set_handle_irq(davinci_cp_intc_handle_irq);
>  
> 

I'm sorry, but how is turning an explicit message into a long stack
trace really useful?

	M.
-- 
Jazz is not dead. It just smells funny...