Hi Hans,

On Sat, Jul 19, 2014 at 12:31:19PM +0200, Hans de Goede wrote:

On 07/19/2014 12:18 PM, Hans de Goede wrote:

quoted

The problem is that:

1) We need to enable resources before we can do ahci_save_initial_config()
2) We must do ahci_save_initial_config() before we can do ata_host_alloc_pinfo()
3) Therefor we don't have port_info at enable_resources time, which is when we
want to enable the phys (and we cannot just enable the phys elsewhere as
enable_resouces gets used on e.g. resume too).

So I think it is best to just make the phy pointers an array inside
ahci_host_priv, with a comment that the array indexes must match port
indexes.

So looking at "[PATCH v10 4/8] ata: libahci: allow to use multiple PHYs"
I see that currently the phy array indexes do not necessarily match the
port indexes. Since you already allocate the phys array at nports size,
I suggest simply making the array sparse, leaving in NULL entries for
unused ports, and adjusting enable / disable_phys to check for NULL
pointers. This way we still have a 1:1 way to map ports <-> phys if
we want to do something with phys on a per port basis in the future.

Note please also add a check that reg < nports so that we don't use
the array out of bounds if there is an error in the dts.

Ok. I'll rework patch 4 along with the other modifications requested,
and I'll send a new version early this week.

Antoine

-- 
Antoine T?nart, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com