Block a physical property?

[Pierre Ossman]

How come 'block' is considered a physical property (a bus even) and not
a functional property? It seems a bit weird from my point of view. That
something is block based seems more of a protocol detail than anything else.

I know the sysfs layout is a but funky concerning block devices, but the
concensus seem to be that it should be eventually moved to /sys/class/block.

Also, the block "bus" forgets to set info.bus. ;)

Rgds
Pierre