Possible suspend/resume regression in .32-rc?

Daniel Mack daniel at caiaq.de
Wed Jan 13 06:46:51 EST 2010


On Thu, Nov 05, 2009 at 12:06:13AM -0500, Haojian Zhuang wrote:
> 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.

It seems Stanislav's patch is still unmerged in the current git HEAD.
Any idea why it is held back? I have it applied locally since quite a
while here, and it works well. So if it helps, take my Tested-by: for
it.

Daniel




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