msk0: interrupt storm

[Pavel Gorshkov]

My laptop running 9.0-RELEASE/amd64/GENERIC freezes and
(sometimes) unfreezes intermittently, logging the following:

Feb 28 23:07:36 lifebook kernel: interrupt storm detected on "irq259:"; throttling interrupt source

$ vmstat -i
...
irq259: mskc0                   11669511       3456


Looks very similar to this:
http://www.freebsd.org/cgi/query-pr.cgi?pr=164569

Any suggestions?