CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2010/09/03 12:14:54
Modified files:
sys/dev/pci : if_vr.c
Log message:
bus_dmamap_sync() freshly initialized Rx descriptors before flipping the bit
that hands them over to the hardware. This prevents the hardware from seeing
stale contents if the compiler decides to re-order stores or if the hardware
does store-reordering.
There are sme doubts whether the i386/amd64 bus_dmamap_sync() implementation
will be able to convince future compilers that do even more insanely stupid
optimizations from re-ordering stores. That will be addressed in a seperate
patch.
ok matthew@, sthen@, oga@
