Messages in this thread | | | From | Jonathan Woithe <> | Subject | Re: [PATCH] fujitsu-laptop: consolidated fixes (NULL pointer checks, [un]registration fixes, etc) | Date | Fri, 31 Jul 2009 13:34:26 +0930 (CST) |
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Hi all
> > This patch consolidates the two patches posted by Bartlomiej Zolnierkiewicz > > and the NULL pointer patch which came out of a discussion with Julia Lawall. > > Some additional NULL pointer check tidy-ups have also been done. > > > > To summarise: > > I think that for the increased readability and to preserve proper credits it > would be better to keep separate patches (updating the driver version can be > as well handled in an incremental patch).
Ok, leave it with me and I'll re-split along these lines.
> I would also strongly insist on removing the following needless NULL pointer > checks introduced by this version. They may hide real bugs in the ACPI driver > code (which should make sure that we always have valid 'device' in the ACPI > driver methods and that it doesn't go away while the method executes) or in > the fujitsu-laptop itself (which has to always provide valid 'fujitsu_hotkey', > 'fujitsu' and 'input' pointers and not free them while there are still some > users left).
I'll take another look at these. What I was concerned about was whether the hotkey pointer in particular was valid in all cases (since some of the relevant laptops don't in fact have hotkeys) - and I was very short of time yesterday. I've had a very quick look through the code just now and it seems that this may not be a problem after all. In any case I'll confirm this over the next day or so and redo/reisssue the patches accordingly.
Regards jonathan
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