Possible suspend/resume regression in .32-rc?
haojian.zhuang at gmail.com
Thu Nov 5 00:06:13 EST 2009
On Tue, Nov 3, 2009 at 4:50 AM, Stanislav Brabec <utx at penguin.cz> wrote:
> Haojian Zhuang wrote:
>> On Mon, Nov 2, 2009 at 5:57 AM, Stanislav Brabec <utx at penguin.cz> wrote:
>> > Haojian Zhuang wrote:
>> >> Commit b5b82df6, from May 2007, breaks no_console_suspend on the OLPC
>> >> XO laptop. Basically what happens is that upon returning from resume,
>> >> serial8250_resume_port() will reconfigure the port for high speed
>> >> mode and all console output will be garbled, making debug of the
>> >> resume path painful. This patch modifies uart_resume_port() to
>> >> reset the port to the state it was in before we suspended.
>> > See my patch waiting for approval in LKML thread
>> > "serial-core: resume serial hardware with no_console_suspend".
>> > It attempts to fix it, but I was not yet able to test it due to spitz
>> > resume breakage.
>> Hi Stanislav,
>> At first, your patch can't be applied into my latest codebase. I have
>> to update the patch. But the console resume is still blocked after
>> applied your patch. It works only after I merge some old code back. My
>> modified patch is in below.
> Yes, code changed there a bit. I sent rebased patch later in the thread.
> Did you try this one? (Well I did not test it yet - in time of sending
> resume did not work at all on my Zaurus.)
> Your patch is a bit different. I'll test both as soon as possible.
Your latest patch works well in my platform. Thanks a lot.
More information about the linux-arm-kernel