Re: [RFT][PATCHSET] hotplug polling

[Tejun Heo <htejun@gmail.com>]

Tejun Heo wrote:
> Well, the port-exclusive case is dumb but understandable; however,
> sata_via (vt8237) takes it to the next level and may lock up if any
> available port in the host_set is active when a SCR reg is accessed,
> so it needs host_set-exclusive version.  It took me two days of
> boredom to figure out that things can be made THAT dumb.  Their new
> AHCI controller also seems to require host_set-wide EH ops to recover
> from errors.  Well, I guess they consider requiring host_set-wide ops
> a feature or something.  :-( Note that this means that the current
> libata EH may lock up the whole machine on vt8237 if EH occurs at a
> bad time.

Update: vt8237 failed to survive over-night test.  It died even with 
host_set-wide exclusion.  I'm dropping hp-poll support from sata_via.

-- 
tejun