cvs commit: src/sys/cam/scsi scsi_da.c src/sys/dev/usb umass.c usbdevs

[Scott Long]

Matthew Jacob wrote:
>>>
>>> You're suggesting that the umass and firewire SIMs universally instruct
>>> CAM to not send a SYNC CACHE for all targets?  Easy, but I think it's
>>> too big of a hammer.  I'd like to see the da driver get modified to
>>> check the WCE state as has been suggested.
>>
>>
>> I agree, I wasn't clear.  I meant that we should use the mode sense 
>> approach instead of adding quirks all the time for something that's 
>> endemic to a particular architecture.  But if that doesn't work, 
>> perhaps something specific to USB and Firewire may be appropriate.
> 
> 
> And how will you distinguish between "not currently enabled" and "not 
> supported"?
> 

If WCE is not supported, will the device lie and report the WCE bit as
set?

Scott