linux-kernel - Re: [PATCH] arm: dt: Initialize boot_command_line from CONFIG_CMDLINE in case DT does not provide /chosen/bootargs

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Date:   Wed, 14 Dec 2016 13:46:22 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     Pavel Machek <pavel@....cz>
Cc:     Pali Rohár <pali.rohar@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>,
        Robin Murphy <robin.murphy@....com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Ben Dooks <ben-linux@...ff.org>,
        Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
        Sebastian Reichel <sre@...nel.org>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm: dt: Initialize boot_command_line from
 CONFIG_CMDLINE in case DT does not provide /chosen/bootargs

* Pavel Machek <pavel@....cz> [161214 13:26]:
> On Wed 2016-12-14 22:12:43, Pali Rohár wrote:
> > Commit 008a2ebcd677 ("ARM: dts: omap3: Remove skeleton.dtsi usage") broke
> > support for setting cmdline on Nokia N900 via CONFIG_CMDLINE.
> > 
> > It is because arm code booted in DT mode parse cmdline only via function
> > early_init_dt_scan_chosen() and that function does not fill variable
> > boot_command_line when DTB does not contain /chosen entry. It is called
> > from function early_init_dt_scan_nodes() in setup_machine_fdt().
> > 
> > This patch fixes it by explicitly filling boot_command_line in function
> > setup_machine_fdt() after calling early_init_dt_scan_nodes() in case
> > boot_command_line still remains empty.
> > 
> > Signed-off-by: Pali Rohár <pali.rohar@...il.com>
> 
> Acked-by: Pavel Machek <pavel@....cz>

Acked-by: Tony Lindgren <tony@...mide.com>