Re: [PATCH 2/5] ath10k: setup irq method in probe

[Kalle Valo <kvalo@qca.qualcomm.com>]

Michal Kazior <michal.kazior@tieto.com> writes:

>>> @@ -1905,22 +1915,10 @@ static int __ath10k_pci_hif_power_up(struct ath10k *ar, bool cold_reset)
>>>               goto err;
>>>       }
>>>
>>> -     ret = ath10k_ce_disable_interrupts(ar);
>>> -     if (ret) {
>>> -             ath10k_err("failed to disable CE interrupts: %d\n", ret);
>>> -             goto err_ce;
>>> -     }
>>> -
>>> -     ret = ath10k_pci_init_irq(ar);
>>> -     if (ret) {
>>> -             ath10k_err("failed to init irqs: %d\n", ret);
>>> -             goto err_ce;
>>> -     }
>>> -
>>>       ret = ath10k_pci_request_early_irq(ar);
>>>       if (ret) {
>>>               ath10k_err("failed to request early irq: %d\n", ret);
>>> -             goto err_deinit_irq;
>>> +             goto err_ce;
>>>       }
>>
>> You add ath10k_pci_ce_init() to probe() and respective
>> ath10k_pci_ce_deinit() to remove(), and you remove
>> ath10k_pci_ce_deinit() from hif_power_down(). But why do you leave
>> ath10k_pci_ce_init() to hif_power_up()? Isn't that unnecessary as we
>> already do that in probe()?
>
> Hmm.. I didn't check if copy engine register state (notable ring index
> values) is guaranteed to be usable in all cases yet and decided it's
> safer to just re-init it on each power up until it is proven it is not
> necessary.

So I have been trying to follow this naming scheme for initilisation:

_create() - called during device probe time
_start() - if up / power up
_stop() - if down / power down
_destroy() - called when device is removed

If you call ce_init() both in create() and start() time there has to be
some redundant code and I think the function should be split. This isn't
a concern now, but something for the future.

-- 
Kalle Valo