linux-kernel - Re: [PATCH] irqchip/loongson-liointc: Fix an error handling path in liointc

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Message-ID: <CAAhV-H4Z4Ujif3UcSeSUMdT6SR0hVQnLCCzdGhg27mrtW4OvnQ@mail.gmail.com>
Date:   Tue, 24 May 2022 11:47:23 +0800
From:   Huacai Chen <chenhuacai@...nel.org>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     dan.carpenter@...cle.com, Jiaxun Yang <jiaxun.yang@...goat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        "open list:MIPS" <linux-mips@...r.kernel.org>
Subject: Re: [PATCH] irqchip/loongson-liointc: Fix an error handling path in liointc_init()

Hi, Christophe,

On Tue, May 24, 2022 at 10:50 AM Huacai Chen <chenhuacai@...nel.org> wrote:
>
> Hi, Christophe,
>
> On Sun, May 22, 2022 at 9:44 PM Christophe JAILLET
> <christophe.jaillet@...adoo.fr> wrote:
> >
> > If a of_property_match_string() call fails, we still need to release some
> > resources.
> > Add the corresponding goto instead of a direct return.
> Your patch is correct, but 807e93d0ecbb hasn't been upstream, I don't
> know how to handle it.
>
> Huacai
> >
> > Fixes: 807e93d0ecbb ("irqchip/loongson-liointc: Add ACPI init support")
> > Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> > ---
> >  drivers/irqchip/irq-loongson-liointc.c | 6 ++++--
> >  1 file changed, 4 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/irqchip/irq-loongson-liointc.c b/drivers/irqchip/irq-loongson-liointc.c
> > index ff3cb5b05710..2227b702a81d 100644
> > --- a/drivers/irqchip/irq-loongson-liointc.c
> > +++ b/drivers/irqchip/irq-loongson-liointc.c
> > @@ -185,8 +185,10 @@ static int liointc_init(phys_addr_t addr, unsigned long size, int revision,
> >                         int index = of_property_match_string(node,
> >                                         "reg-names", core_reg_names[i]);
> >
> > -                       if (index < 0)
> > -                               return -EINVAL;
> > +                       if (index < 0) {
> > +                               err = -EINVAL;
> > +                               goto out_iounmap;
> > +                       }
Just goto out_iounmap is OK, because it returns -EINVAL at last.
I've squash your patch to the original one and add a Co-developed-by:,
not sure it is the best solution. Thanks.

Huacai
> >
> >                         priv->core_isr[i] = of_iomap(node, index);
> >                 }
> > --
> > 2.34.1
> >