Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Andreas Schwab <schwab@suse.de>
To:     Paul Walmsley <paul.walmsley@sifive.com>
Cc:     linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
        paul@pwsan.com, palmer@sifive.com, aou@eecs.berkeley.edu
Subject: Re: [PATCH] arch: riscv: support kernel command line forcing when no DTB passed
References: <alpine.DEB.2.21.9999.1812171913510.29609@viisi.sifive.com>
Date:   Tue, 05 Feb 2019 18:43:10 +0100
In-Reply-To: <alpine.DEB.2.21.9999.1812171913510.29609@viisi.sifive.com> (Paul
        Walmsley's message of "Mon, 17 Dec 2018 19:15:12 -0800 (PST)")
Message-ID: <mvm36p22ksx.fsf@suse.de>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1.91 (gnu/linux)
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Dez 17 2018, Paul Walmsley <paul.walmsley@sifive.com> wrote:

> diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
> index 2c290e6aaa6e..e6b962ff39b1 100644
> --- a/arch/riscv/kernel/setup.c
> +++ b/arch/riscv/kernel/setup.c
> @@ -171,7 +171,14 @@ asmlinkage void __init setup_vm(void)
>  
>  void __init parse_dtb(unsigned int hartid, void *dtb)
>  {
> -	early_init_dt_scan(__va(dtb));
> +	if (!early_init_dt_scan(__va(dtb)))
> +		return;
> +
> +	pr_err("No DTB passed to the kernel\n");

Isn't that backwards?  early_init_dt_scan returns true if it found a
DTB.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."