Re: [PATCH] hpsa: add support for legacy boards

[Christoph Hellwig <hch@lst.de>]

On Tue, Jul 11, 2017 at 06:58:36PM +0300, Meelis Roos wrote:
> > The 5i controller is probably too old for the hpsa driver to support. 
> > The hpsa driver is looking for information to determine if the drive is online/offline and
> > this information is not available.
> > 
> > What was the original issue you were having with the cciss driver?
> 
> Christoph Hellwig updated block layer with "block: Make most 
> scsi_req_init() calls implicit" and at first try, cciss was left without 
> the needed initialization. This caused OOPS in udev probing but the 
> system worked. The issue was fixed by Christoph quickly.

The original patch is from Bart, but otherwise correct.

> But he suggested it might be worth trying hpsa driver instead of cciss, 
> with a longer term goal to to move users of cciss over to hpsa if 
> possible. Now that I have tested it, it seems not all older cards are 
> supported in hpsa - it's more than ID-s and interrupt masks.

Seems like it.  And the idea behind this game is that we'd like to slowly
get rid of old request_fn based drivers.  Given that hpsa supports very
similar hardware cciss is a target for removal once that hardware is
switched over.  But it seems like we'll need more work in this area..

> 
> -- 
> Meelis Roos (mroos@linux.ee)
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