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Subject: Re: [PATCH v4 02/14] irqchip/csky-apb-intc: Fix potential resource
 leaks
To:     Markus Elfring <Markus.Elfring@web.de>,
        Thomas Gleixner <tglx@linutronix.de>,
        Jason Cooper <jason@lakedaemon.net>,
        Marc Zyngier <maz@kernel.org>, Guo Ren <guoren@kernel.org>,
        linux-csky@vger.kernel.org
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 <1a0e007a-db94-501b-4ab9-0bb479ec093b@loongson.cn>
 <971c649e-fe07-3771-6fea-f5aaeaf090ad@web.de>
Cc:     linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
From:   Tiezhu Yang <yangtiezhu@loongson.cn>
Message-ID: <c7cc848a-1ce0-e877-aa44-ebafe4b5985c@loongson.cn>
Date:   Thu, 2 Jul 2020 09:18:25 +0800
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On 07/01/2020 09:04 PM, Markus Elfring wrote:
>> If remove the local variable "ret",  it will look like this:
> …
>> +++ b/drivers/irqchip/irq-csky-apb-intc.c
> …
>> @@ -118,18 +116,23 @@ ck_intc_init_comm(struct device_node *node, struct device_node *parent)
> …
>> -       ret = irq_alloc_domain_generic_chips(root_domain, 32, 1,
>> +       if (irq_alloc_domain_generic_chips(root_domain, 32, 1,
>>                          "csky_intc", handle_level_irq,
>> -                       IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN, 0, 0);
>> -       if (ret) {
>> +                       IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN, 0, 0)) {
>>                  pr_err("C-SKY Intc irq_alloc_gc failed.\n");
> …
>
> I suggest to recheck the parameter alignment for such a function call.
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/coding-style.rst?id=7c30b859a947535f2213277e827d7ac7dcff9c84#n93

OK, thank you, like this:

-       ret = irq_alloc_domain_generic_chips(root_domain, 32, 1,
-                       "csky_intc", handle_level_irq,
-                       IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN, 0, 0);
-       if (ret) {
+       if (irq_alloc_domain_generic_chips(root_domain, 32, 1,
+                                          "csky_intc", handle_level_irq,
+                                          IRQ_NOREQUEST | IRQ_NOPROBE | 
IRQ_NOAUTOEN, 0, 0)) {
                 pr_err("C-SKY Intc irq_alloc_gc failed.\n");
-               return -ENOMEM;
+               goto err_domain_remove;
         }

>
> Regards,
> Markus