linux-kernel - Re: [PATCH 04/11] PCI: epf-test: Refactor pci_epf_test

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Message-ID: <20240326075834.GF9565@thinkpad>
Date: Tue, 26 Mar 2024 13:28:34 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Niklas Cassel <cassel@...nel.org>
Cc: Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Jingoo Han <jingoohan1@...il.com>,
	Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
	linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org, mhi@...ts.linux.dev,
	linux-tegra@...r.kernel.org
Subject: Re: [PATCH 04/11] PCI: epf-test: Refactor pci_epf_test_unbind()
 function

On Fri, Mar 22, 2024 at 05:09:03PM +0100, Niklas Cassel wrote:
> On Thu, Mar 14, 2024 at 08:53:43PM +0530, Manivannan Sadhasivam wrote:
> > Move the pci_epc_clear_bar() and pci_epf_free_space() code to respective
> > helper functions. This allows reusing the helpers in future commits.
> > 
> > This also requires moving the pci_epf_test_unbind() definition below
> > pci_epf_test_bind() to avoid forward declaration of the above helpers.
> > 
> > No functional change.
> > 
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > ---
> >  drivers/pci/endpoint/functions/pci-epf-test.c | 63 ++++++++++++++++++---------
> >  1 file changed, 42 insertions(+), 21 deletions(-)
> > 
> > diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
> > index 1dae0fce8fc4..2fac36553633 100644
> > --- a/drivers/pci/endpoint/functions/pci-epf-test.c
> > +++ b/drivers/pci/endpoint/functions/pci-epf-test.c
> > @@ -686,27 +686,6 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
> >  			   msecs_to_jiffies(1));
> >  }
> >  
> > -static void pci_epf_test_unbind(struct pci_epf *epf)
> > -{
> > -	struct pci_epf_test *epf_test = epf_get_drvdata(epf);
> > -	struct pci_epc *epc = epf->epc;
> > -	struct pci_epf_bar *epf_bar;
> > -	int bar;
> > -
> > -	cancel_delayed_work(&epf_test->cmd_handler);
> > -	pci_epf_test_clean_dma_chan(epf_test);
> > -	for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
> > -		epf_bar = &epf->bar[bar];
> > -
> > -		if (epf_test->reg[bar]) {
> > -			pci_epc_clear_bar(epc, epf->func_no, epf->vfunc_no,
> > -					  epf_bar);
> > -			pci_epf_free_space(epf, epf_test->reg[bar], bar,
> > -					   PRIMARY_INTERFACE);
> > -		}
> > -	}
> > -}
> > -
> >  static int pci_epf_test_set_bar(struct pci_epf *epf)
> >  {
> >  	int bar, add;
> > @@ -746,6 +725,22 @@ static int pci_epf_test_set_bar(struct pci_epf *epf)
> >  	return 0;
> >  }
> >  
> > +static void pci_epf_test_clear_bar(struct pci_epf *epf)
> > +{
> > +	struct pci_epf_test *epf_test = epf_get_drvdata(epf);
> > +	struct pci_epc *epc = epf->epc;
> > +	struct pci_epf_bar *epf_bar;
> > +	int bar;
> > +
> > +	for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
> > +		epf_bar = &epf->bar[bar];
> > +
> > +		if (epf_test->reg[bar])
> > +			pci_epc_clear_bar(epc, epf->func_no, epf->vfunc_no,
> > +					  epf_bar);
> > +	}
> > +}
> > +
> >  static int pci_epf_test_epc_init(struct pci_epf *epf)
> >  {
> >  	struct pci_epf_test *epf_test = epf_get_drvdata(epf);
> > @@ -885,6 +880,22 @@ static int pci_epf_test_alloc_space(struct pci_epf *epf)
> >  	return 0;
> >  }
> >  
> > +static void pci_epf_test_free_space(struct pci_epf *epf)
> > +{
> > +	struct pci_epf_test *epf_test = epf_get_drvdata(epf);
> > +	struct pci_epf_bar *epf_bar;
> > +	int bar;
> > +
> > +	for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
> > +		epf_bar = &epf->bar[bar];
> > +
> > +		if (epf_test->reg[bar]) {
> > +			pci_epf_free_space(epf, epf_test->reg[bar], bar,
> > +					   PRIMARY_INTERFACE);
> > +		}
> 
> Nit: No need for braces here. (Just like you don't have braces in
> pci_epf_test_clear_bar()).
> 
> Like you said in the other thread, this commit clashes with changes done
> in my series.
> 

I think I should just rebase this series on top of yours.

> However, except for the small nit, the commit looks good:
> Reviewed-by: Niklas Cassel <cassel@...nel.org>
>

Thanks!
 
- Mani

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