linux-kernel - Re: [PATCH] irqchip: nvic: release nvic

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Date:   Tue, 1 Mar 2022 08:43:32 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     Thomas Gleixner <tglx@...utronix.de>, maz@...nel.org
Cc:     linux-kernel@...r.kernel.org, kernel test robot <lkp@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH] irqchip: nvic: release nvic_base upon failure

On Fri, Feb 18, 2022 at 10:03 PM Souptick Joarder <jrdr.linux@...il.com> wrote:
>
> From: "Souptick Joarder (HPE)" <jrdr.linux@...il.com>
>
> smatch warning was reported as below ->
>
> smatch warnings:
> drivers/irqchip/irq-nvic.c:131 nvic_of_init()
> warn: 'nvic_base' not released on lines: 97.
>
> Release nvic_base upon failure.

Any comments on this patch ?

>
> Reported-by: kernel test robot <lkp@...el.com>
> Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
> Signed-off-by: Souptick Joarder (HPE) <jrdr.linux@...il.com>
> ---
>  drivers/irqchip/irq-nvic.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/irqchip/irq-nvic.c b/drivers/irqchip/irq-nvic.c
> index 125f9c1cf0c3..ba6332b00a0a 100644
> --- a/drivers/irqchip/irq-nvic.c
> +++ b/drivers/irqchip/irq-nvic.c
> @@ -94,6 +94,7 @@ static int __init nvic_of_init(struct device_node *node,
>
>         if (!nvic_irq_domain) {
>                 pr_warn("Failed to allocate irq domain\n");
> +               iounmap(nvic_base);
>                 return -ENOMEM;
>         }
>
> @@ -103,6 +104,7 @@ static int __init nvic_of_init(struct device_node *node,
>         if (ret) {
>                 pr_warn("Failed to allocate irq chips\n");
>                 irq_domain_remove(nvic_irq_domain);
> +               iounmap(nvic_base);
>                 return ret;
>         }
>
> --
> 2.25.1
>