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 <[email protected]>
Sent: 2020年2月12日 22:50
To: Rasmus Villemoes <[email protected]>; Leo Li
<[email protected]>; Qiang Zhao <[email protected]>; Greg
Kroah-Hartman <[email protected]>
Cc: Scott Wood <[email protected]>; [email protected]; LKML
<[email protected]>; [email protected]
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().

And maybe the return code should be checked, because if it's not 0, cpm_muram_init() won't have been called.

Thanks,
Christophe

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