Re: [PATCH v2] Dynamically add and remove device specific reset functions

[Tadeusz Struk <tadeusz.struk@intel.com>]

On 02/03/12 16:29, Bjorn Helgaas wrote:
> Where do you plan to add calls to pci_dev_specific_reset_add()?  In
> drivers?

Yes, I'm working on a driver for a device with SRIOV capability.
I'll call it from there.

> Did you consider adding a "reset" function pointer to struct
> pci_driver?  That might be more natural -- the reset function is right
> with all the other code that knows about the device, and there's no
> issue with looking up the correct reset function.
> With this patch, we sort of have two different ways to map
> vendor/device IDs to code: the usual pci_register_driver() approach,
> and this one using reset_list.  If pci_driver had a "reset" pointer,
> that would be used most of the time.  You might still need the
> reset_list for generic things, e.g., the reset_intel_generic_dev()
> function, but it would be a fallback.  It might look something like:
> 
>     struct pci_driver *drv = dev->driver;
> 
>     if (drv && drv->reset) {
>         drv->reset(dev);
>         return;
>     }
> 
>     list_for_each_entry(i, &reset_list, list) {
>         ...
> 

No, I didn't think about it.
This is good idea, but for me the pci_dev_specific_reset() works fine.

> In that case, you might not even need the ability to dynamically add
> things to the list, since the only things to add would be "generic"
> things that would be more static.
> 
> Perhaps this approach was previously discussed and discarded; if so, I
> missed it.
> 
> Bjorn

Do you want me to send another patch that fixes these minor issues you pointed out?
Thanks for you comments.
Tadeusz

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