From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
To: Christophe Leroy <christophe.leroy@c-s.fr>,
Li Yang <leoyang.li@nxp.com>, Qiang Zhao <qiang.zhao@nxp.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Scott Wood <oss@buserror.net>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [Regression 5.6-rc1][Bisected b6231ea2b3c6] Powerpc 8xx doesn't boot anymore
Date: Thu, 13 Feb 2020 10:37:44 +0100 [thread overview]
Message-ID: <59487f8a-fd2e-703d-d954-d263f756a3a0@rasmusvillemoes.dk> (raw)
In-Reply-To: <aee10440-c244-7c93-d3bb-fd29d8a83be4@c-s.fr>
On 12/02/2020 15.50, Christophe Leroy wrote:
>
>
> On 02/12/2020 02:24 PM, Christophe Leroy wrote:
>> In your commit text you explain that cpm_muram_init() is called via
>> subsys_initcall. But console init is done before that, so it cannot work.
>>
>> Do you have a fix for that ?
>>
>
> The following patch allows powerpc 8xx to boot again. Don't know if
> that's the good place and way to do the fix though.
>
> ---
> diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
> b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
> index 4cabded8390b..341d682ec6eb 100644
> --- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
> +++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
> @@ -1351,6 +1351,7 @@ static int __init cpm_uart_console_setup(struct
> console *co, char *options)
> clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
> }
>
> + cpm_muram_init();
> ret = cpm_uart_allocbuf(pinfo, 1);
>
> if (ret)
Hmm, that seems to be a somewhat random place, making it hard to see
that it is indeed early enough. Would it work to put it inside the
console_initcall that registers the cpm console? I.e.
static int __init cpm_uart_console_init(void)
{
+ cpm_muram_init();
register_console(&cpm_scc_uart_console);
return 0;
}
console_initcall(cpm_uart_console_init);
Rasmus
next prev parent reply other threads:[~2020-02-13 9:37 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-12 14:24 [Regression 5.6-rc1][Bisected b6231ea2b3c6] Powerpc 8xx doesn't boot anymore Christophe Leroy
2020-02-12 14:42 ` Christophe Leroy
2020-02-12 14:50 ` Christophe Leroy
2020-02-13 3:35 ` Qiang Zhao
2020-02-13 6:17 ` Christophe Leroy
2020-02-13 6:36 ` Qiang Zhao
2020-02-13 9:37 ` Rasmus Villemoes [this message]
2020-02-13 10:50 ` Christophe Leroy
2020-02-13 7:45 ` Rasmus Villemoes
2020-02-13 10:40 ` Christophe Leroy
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