Re: [PATCH] input: Fix interrupt enable in i8042_ctr when enabling interrupt fails

[Dmitry Torokhov]

Hi Steven, Markus,

On 9/10/07, Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
>
> --
> On Mon, 10 Sep 2007, Markus Armbruster wrote:
> >
> > I believe this possible, but unlikely (perhaps not so unlikely on
> > virtual machines).  Scenarios involve enable succeeding the first
> > time, failing the second time, and succeeding the third time.  I can
> > provide details, but the point I'd like to make is not that this is
> > broken (although it is, strictly speaking), but that it is not
> > obviously correct where it easily could be: just clear the interrupt
> > enable bits when writing them to the hardware failed, like the old
> > code did.
> >
>
> I also want to stress that this is more of a clean up for "technically
> correct" code than a bug fix.  This bug probably would never happen on
> baremetal unless it was running on broken hardware.
>
>  BUT!!!
>
> With more and more systems going to a virtual environment, having a bug or
> some other anomaly can trigger the error that this patch prevents. The
> patch will also trigger a print in the case of running on a buggy virtual
> machine, which would help out the developers of that virtual machine to
> fix their code.
>

The patch is in my tree and will be merged in the next window.

-- 
Dmitry
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/