linux-kernel - Re: [PATCH v3 -next 11/11] serial: 8250_early: Remove setup_early_serial8250

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Message-ID: <CAE9FiQVKY9KLeBOB0shqTPZZipsmAiU=3_8gzfFhsCW9kxo_uA@mail.gmail.com>
Date:	Thu, 2 Apr 2015 02:15:09 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Peter Hurley <peter@...leysoftware.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jiri Slaby <jslaby@...e.cz>, Rob Herring <robh@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>
Subject: Re: [PATCH v3 -next 11/11] serial: 8250_early: Remove setup_early_serial8250_console()

On Wed, Apr 1, 2015 at 8:22 PM, Peter Hurley <peter@...leysoftware.com> wrote:
> The documented behavior of console=ttyS options, to which your
> quote refers, clearly states:
>
>                 Default is "9600n8".

drivers/tty/serial/8250/8250_early.c:early_serial8250_setup
still have calling to probe_baud, but it is not triggered.

Here is root cause.
The gap between entries in earlycon_table cause
iteration fail to find next entry, so uart8250 handler is
not called proplerly.

attached patch fix the problem.

Thanks

Yinghai

View attachment "fix_earlycon_alignment.patch" of type "text/x-patch" (4743 bytes)