On Tue, Jul 3, 2018 at 5:55 PM, Baoquan He <bhe@xxxxxxxxxx> wrote: > On 06/12/18 at 05:24pm, Andy Shevchenko wrote: >> On Tue, Jun 12, 2018 at 5:20 PM, Andy Shevchenko >> <andy.shevchenko@xxxxxxxxx> wrote: >> > I briefly looked at the code and error codes we have, so, my proposal >> > is one of the following >> >> > - use -ECANCELED (not the best choice for first occurrence here, >> > though I can't find better) >> >> Actually -ENOTSUPP might suit the first case (although the actual >> would be something like -EOVERLAP, which we don't have) > > Sorry for late reply, and many thanks for your great suggestion. > > I am fine to use -ENOTSUPP as the first returned value, and -ECANCELED > for the 2nd one. I have no strong opinion, but I like (slightly better) this approach ^^^ > Or define an enum as you suggested inside the function > or in header file. > > Or use -EBUSY for the first case because existing resource is > overlapping but not fully contained by 'res'; and -EINVAL for > the 2nd case since didn't find any one resources which is contained by > 'res', means we passed in a invalid resource. > > All is fine to me, I can repost with each of them. >> > - use positive integers (or enum), like >> > #define RES_REPARENTED 0 >> > #define RES_OVERLAPPED 1 >> > #define RES_NOCONFLICT 2 -- With Best Regards, Andy Shevchenko _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
