ATA_FLUSHCACHE failing

Hi,

I finally took the time to find out why I can't get a coredump on panic:

ata_controlcmd(&ch->device[MASTER], ATA_FLUSHCACHE, 0, 0, 0);

never returns in ata_shutdown() on my system (dmesg attached).

Commenting it out gives me back my coredumps! ;)

Have you seen this before?

If not, should we maybe create some blacklist of chips that report that
they can flush but in reality can't ...

Mark