[U-Boot] [PATCH 1/5] AHCI: Increase link timeout to 200ms

[Ian Campbell]

On Fri, 2014-07-04 at 17:44 +0200, Marek Vasut wrote:
> On Friday, July 04, 2014 at 05:26:40 PM, Ian Campbell wrote:
> > On Fri, 2014-07-04 at 16:58 +0200, Marek Vasut wrote:
> > > On Saturday, May 31, 2014 at 06:36:11 PM, Ian Campbell wrote:
> > > > In 73545f75b66d "ahci: wait longer for link" I increased the
> > > > timeout to 40ms based on the observed behaviour of a WD disk on a
> > > > Cubietruck. Since then Karsten Merker and myself have both
> > > > observed timeouts with HGST disks (Karsten on Cubietruck, me on
> > > > Cubieboard2). Increasing the timeout to ~175ms fixes this, so go
> > > > to 200ms for a bit of headroom.
> > > > 
> > > > Signed-off-by: Ian Campbell <ijc at hellion.org.uk>
> > > > Cc: Karsten Merker <merker at debian.org>
> > > 
> > > Is there no way to poll for this condition instead of using an
> > > ever-growing timeout?
> > 
> > This timeout is the maximum time to poll for. If the device is ready
> > sooner (likely) then we'll notice that and carry one.
> 
> And if the device is never ready, then we will wait 200mS for nothing ?

If you've typed "scsi scan", yes.

Does u-boot have any mechanisms to do anything else though?

Ian.