Re: [PATCH RFT 7/7] firewire: sbp2: add workarounds for 2nd and 3rd generation iPods

From: Jarod Wilson
Date: Wed Jan 28 2009 - 17:25:51 EST

On Wednesday 28 January 2009 17:18:41 Jarod Wilson wrote:
> >   - Is the "no page tables" workaround really necessary for 2nd gen.
> >     iPods, or is the 128k limit sufficient as reported for the Ubuntu
> >     8.10 kernel?
> Looks to me like the no page tables workaround isn't needed. I could
> have sworn the defaults w/this patch (workarounds 0x48) was actually
> causing dd to fail last night, but I haven't been able to reproduce
> that failure, now that I'm trying (maybe I this ipod mixed up with one
> of the others in the pile...).

Yep, I'm a dummy. The failure I was thinking of was w/the completely
flaky 3rd-gen iPod, just went back and looked at logs.

So far as I can tell, I'm thinking 128k limit + fix capacity should be
okay for both the 2nd and 3rd-gen iPods, and if someone comes up with
evidence that the 2nd-gen does something badly w/the fix capacity
workaround enabled, then we revisit trying to apply the workarounds
more narrowly somehow.

Jarod Wilson

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