linux-kernel - Re: [PATCH] RISC-V: fix bad use of of_node

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Date:   Tue, 8 Jan 2019 02:10:12 -0800
From:   Atish Patra <atish.patra@....com>
To:     Andreas Schwab <schwab@...e.de>
Cc:     "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "palmer@...ive.com" <palmer@...ive.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "anup@...infault.org" <anup@...infault.org>,
        "jeremy.linton@....com" <jeremy.linton@....com>,
        "sudeep.holla@....com" <sudeep.holla@....com>
Subject: Re: [PATCH] RISC-V: fix bad use of of_node_put

On 1/7/19 6:16 AM, Andreas Schwab wrote:
> of_find_node_by_type already calls of_node_put, don't call it again.
> 
> Fixes: 94f9bf118f ("RISC-V: Fix of_node_* refcount")
> Signed-off-by: Andreas Schwab <schwab@...e.de>
> ---
>   arch/riscv/kernel/smpboot.c | 6 +-----
>   1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
> index fc185ecabb..18cda0e8cf 100644
> --- a/arch/riscv/kernel/smpboot.c
> +++ b/arch/riscv/kernel/smpboot.c
> @@ -57,15 +57,12 @@ void __init setup_smp(void)
>   
>   	while ((dn = of_find_node_by_type(dn, "cpu"))) {
>   		hart = riscv_of_processor_hartid(dn);
> -		if (hart < 0) {
> -			of_node_put(dn);
> +		if (hart < 0)
>   			continue;
> -		}
>   
>   		if (hart == cpuid_to_hartid_map(0)) {
>   			BUG_ON(found_boot_cpu);
>   			found_boot_cpu = 1;
> -			of_node_put(dn);
>   			continue;
>   		}
>   
> @@ -73,7 +70,6 @@ void __init setup_smp(void)
>   		set_cpu_possible(cpuid, true);
>   		set_cpu_present(cpuid, true);
>   		cpuid++;
> -		of_node_put(dn);
>   	}
>   
>   	BUG_ON(!found_boot_cpu);
> 
Thanks for catching and fixing this.

Reviewed-by: Atish Patra <atish.patra@....com>

Regards,
Atish