linux-kernel - RE: [Regression 5.6-rc1][Bisected b6231ea2b3c6] Powerpc 8xx doesn't boot anymore

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Message-ID: <VE1PR04MB6768B1BFFED67B35D048D72D911A0@VE1PR04MB6768.eurprd04.prod.outlook.com>
Date:   Thu, 13 Feb 2020 06:36:16 +0000
From:   Qiang Zhao <qiang.zhao@....com>
To:     Christophe Leroy <christophe.leroy@....fr>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Leo Li <leoyang.li@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     Scott Wood <oss@...error.net>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [Regression 5.6-rc1][Bisected b6231ea2b3c6] Powerpc 8xx doesn't
 boot anymore

On 02/13/2020 14:17 PM, Christophe Leroy wrote:
> -----Original Message-----
> From: Christophe Leroy <christophe.leroy@....fr>
> Sent: 2020年2月13日 14:17
> To: Qiang Zhao <qiang.zhao@....com>; Rasmus Villemoes
> <linux@...musvillemoes.dk>; Leo Li <leoyang.li@....com>; Greg
> Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Scott Wood <oss@...error.net>; linuxppc-dev@...ts.ozlabs.org; LKML
> <linux-kernel@...r.kernel.org>; linux-arm-kernel@...ts.infradead.org
> Subject: Re: [Regression 5.6-rc1][Bisected b6231ea2b3c6] Powerpc 8xx doesn't
> boot anymore
> 
> 
> 
> Le 13/02/2020 à 04:35, Qiang Zhao a écrit :
> > On 02/12/2020 22:50 PM, Christophe Leroy wrote:
> >> -----Original Message-----
> >> From: Christophe Leroy <christophe.leroy@....fr>
> >> Sent: 2020年2月12日 22:50
> >> To: Rasmus Villemoes <linux@...musvillemoes.dk>; Leo Li
> >> <leoyang.li@....com>; Qiang Zhao <qiang.zhao@....com>; Greg
> >> Kroah-Hartman <gregkh@...uxfoundation.org>
> >> Cc: Scott Wood <oss@...error.net>; linuxppc-dev@...ts.ozlabs.org;
> >> LKML <linux-kernel@...r.kernel.org>;
> >> linux-arm-kernel@...ts.infradead.org
> >> Subject: Re: [Regression 5.6-rc1][Bisected b6231ea2b3c6] Powerpc 8xx
> >> doesn't boot anymore
> >>
> >> ---
> >> 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)
> >>
> > How about the patch like below? Just a draft.
> 
> Yes, I see the idea. I think we could go for something like that.
> But in the powerpc 8xx case, we are talking about cpm_init(), not qe_init().

Yes, cpm_init.  

Best Regards
Qiang Zhao