On Mon, Jun 9, 2014 at 5:25 PM, Tony Luck <tony.luck@xxxxxxxxx> wrote:
> On Sat, May 3, 2014 at 3:16 PM, Greg Kroah-Hartman
> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>>> > >> drivers/tty/serial/8250/8250_early.c | 138 ++++-------------------------------
>>> > >> drivers/tty/serial/8250/Kconfig | 1 +
>>> > >> 2 files changed, 16 insertions(+), 123 deletions(-)
>>> > >
>>> > > Hi Greg, Rob
>>> > >
>>> > > This one in tty-next breaks booting: "console=uart8250,io,0x3f8,115200".
>>> > > No early console and regular console anymore.
>>> > >
>>> > > It should produce "early con and regular con".
>>> >
>>> > This is what I get for running checkpatch and converting
>>> > simple_strtoul to kstrto* which are not so equivalent. kstrto* will
>>> > not convert things such as 115200n8 to a number.
>>> >
>>> > Greg, Do you want a fix or for me to respin the series? The fix looks like this:
>>>
>>> As this is in my tree now (right?), I need a fix to apply to it.
>>
>> Nevermind, you already sent it...
>
> Linus' tree (HEAD=963649d735c8) is spitting out all sorts of garbage
> on the serial console - as if the baud rate is being periodically set
> to something weird, and then back to 112500. I see over a dozen
> blocks of junk interspersed with good output.
Is there any correlation of the garbage to printks of console enabled messages?
>
> This in on ia64 with "console=uart,io,0x3f8" on the command line.
Does "console=ttyS0,115200" or "console=uart,io,0x3f8,115200" work?
You will need this fix for the 2nd one to work:
commit e26f1db9b8d74617519e50b41749900d0a257406
Author: Rob Herring <robh@xxxxxxxxxx>
Date: Wed Apr 30 19:48:29 2014 -0500
tty/serial: fix generic earlycon option parsing
Rob
>
> git bisect pointed me here:
>
> d2fd6810a823bcde1ee232668f5689837aafa772 is first bad commit
> commit d2fd6810a823bcde1ee232668f5689837aafa772
> Author: Rob Herring <robh@xxxxxxxxxx>
> Date: Fri Apr 18 17:19:56 2014 -0500
>
> tty/serial: convert 8250 to generic earlycon
>
> -Tony
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