Re: [PATCH v9 3/7] ata: libahci: allow to use multiple PHYs

From: Hans de Goede
Date: Wed Jul 09 2014 - 10:03:39 EST


On 07/09/2014 03:59 PM, Tejun Heo wrote:
> Hello,
> On Wed, Jul 09, 2014 at 10:23:31AM +0200, Antoine Ténart wrote:
>>> It is confusing. If you wanna pass around available ports in hpriv,
>>> please add a separate field and replace the arguments to
>>> save_initial_config().
>> I don't get it. Which argument should I replace in
>> save_initial_config()? The change is we compute hpriv->port_map.
>> I don't see which arguments we can add or replace.
> The @force_port_map and @mask_port_map of ahci_save_initial_config().
> We end up with three params from two places modifying port_map and one
> of those is in/out parameter, so ummm, no. If you wanna add port
> masking to @hpriv, please do it by moving @force_port_map and
> @mask_port_map into @hpriv instead.
> Sure, the proposed change is small but the end result is messy.
>> I had a quick look on this, and it does not seems to be that simple. The
>> ahci_port_priv is stored inside the ata_port struct and not accessible
>> (as of now) from the ahci_host_priv one. The ahci_port_priv is
>> initialized at the end of ahci_platform_init_host(), far after we need
>> it. This requires quite a lot of changes. Or is there another way?
> Yeah, it'd probably need separating out port resource handling, so
> that the order is get_resources, host_alloc, get_port_resources and
> then init and activate. Hans, what do you think?

The order (and function names) you're suggesting here sound good to me.


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