linux-kernel - Re: [PATCH v3] PCI: pci-epf-test: Register notifier if only core_init

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Message-ID: <20221028170647.GA898435@bhelgaas>
Date:   Fri, 28 Oct 2022 12:06:47 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Om Prakash Singh <omp@...dia.com>,
        Vidya Sagar <vidyas@...dia.com>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] PCI: pci-epf-test: Register notifier if only
 core_init_notifier is enabled

On Thu, Aug 25, 2022 at 06:01:01PM +0900, Kunihiko Hayashi wrote:
> Need to register pci_epf_test_notifier function event if only
> core_init_notifier is enabled.
> 
> Fixes: 5e50ee27d4a5 ("PCI: pci-epf-test: Add support to defer core initialization")
> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
> Acked-by: Om Prakash Singh <omp@...dia.com>
> Acked-by: Kishon Vijay Abraham I <kishon@...com>
> ---
>  drivers/pci/endpoint/functions/pci-epf-test.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> This patch is a part of series "PCI: endpoint: Fix core_init_notifier feature".
> The rest of the patches have been withdrawn.
> 
> Changes since v2:
> - Add Acked-by lines
> 
> Changes since v1:
> - Add Acked-by lines
> 
> diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
> index 36b1801a061b..55283d2379a6 100644
> --- a/drivers/pci/endpoint/functions/pci-epf-test.c
> +++ b/drivers/pci/endpoint/functions/pci-epf-test.c
> @@ -979,7 +979,7 @@ static int pci_epf_test_bind(struct pci_epf *epf)
>  	if (ret)
>  		epf_test->dma_supported = false;
>  
> -	if (linkup_notifier) {
> +	if (linkup_notifier || core_init_notifier) {
>  		epf->nb.notifier_call = pci_epf_test_notifier;
>  		pci_epc_register_notifier(epc, &epf->nb);

Why does pci_epc_register_notifier() even exist?  It's not used at all
except for this test code.

It would be better if infrastructure like this were connected with
some user of it.

>  	} else {
> -- 
> 2.17.1
>