Messages in this thread | | | Subject | Re: GPU-DRM-TILCDC: Less function calls in tilcdc_convert_slave_node() after error detection | From | Jyri Sarha <> | Date | Fri, 23 Sep 2016 13:37:00 +0300 |
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On 09/23/16 10:36, SF Markus Elfring wrote: >> I think the "if (node)" in the of_node_put() is there on purpose, > > Yes, of course. > > Does such an implementation detail correspond to a general software design pattern? >
Yes it does. For instance standard malloc()/free() implementation [1].
> >> because it potentially saves the caller one extra if()-statement > > This can occasionally happen. > > >> and keeps the caller code simpler. > > A special view on software simplicity can also lead to questionable intermediate > function implementation, can't it? >
I don't really follow. But in any case I do not see anything questionable in the current tilcdc_convert_slave_node() implementation.
> >> Keeping the goto labels in right order needs precision > > I can agree to this view. > > >> and can lead to subtle errors. > > The management of jump labels is just another software development challenge > as usual, isn't it? >
Yes. But usually it pays of to avoid complexity when possible.
> >> Sometimes there is no way to avoid that, > > How do you think about to clarify the constraints which you imagine a bit more? >
If the the of_node_put() behaviour would not be specified with null pointer as parameter, there would be such a constraint.
I am beginning to have a feeling that this discussion is not going anywhere.
> >> but here there is. > > I disagree to this conclusion. > > Would you like to care a bit more for efficiency and software correctness > around the discussed exception handling? >
No, I would not. I think we have reached the bottom of this discussion. For the moment I have more important tasks to do.
Best regards, Jyri
[1] http://pubs.opengroup.org/onlinepubs/9699919799/functions/free.html
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