CVS commit: src/sys/arch/arm/arm32

["Nick Hudson" <skrll%netbsd.org@localhost>]

Module Name:    src
Committed By:   skrll
Date:           Tue Sep  8 10:30:17 UTC 2020

Modified Files:
        src/sys/arch/arm/arm32: bus_dma.c

Log Message:
A few bus_dmatag_subregion fixes

- return EOPNOTSUPP if min_addr isn't less than max_addr
- fix the subset check to ensure that all the ranges in the parent tag are
  within the {min,max}_addr range.  If so we can just continue to use the
  parent tag.
- when building the new ranges read the parent tag range rather than un-
  initialised memory.
- remove the max_addr != 0xffffffff check - the overflow should be handled
  by the unsigned arithmetic for arm32.
- add a KASSERT
- add comments


To generate a diff of this commit:
cvs rdiff -u -r1.122 -r1.123 src/sys/arch/arm/arm32/bus_dma.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.