Messages in this thread | | | Date | Mon, 10 Sep 2007 08:59:11 -0400 (EDT) | From | Steven Rostedt <> | Subject | Re: [PATCH] input: Fix interrupt enable in i8042_ctr when enabling interrupt fails |
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-- 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.
Please apply.
-- Steve
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