linux-kernel - Re: [PATCH 4/7] PCI/net: Use PCI_STD_NUM_BARS in loops instead of PCI_STD_RESOURCE

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Date:   Mon, 12 Aug 2019 15:02:08 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Denis Efremov <efremov@...ux.com>
Cc:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        netdev@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/7] PCI/net: Use PCI_STD_NUM_BARS in loops instead of
 PCI_STD_RESOURCE_END

The subject can be simply:

  <prefix>: Loop using PCI_STD_NUM_BARS

to keep them a little shorter so "git log --online" doesn't wrap.

On Sun, Aug 11, 2019 at 06:08:00PM +0300, Denis Efremov wrote:
> This patch refactors the loop condition scheme from
> 'i <= PCI_STD_RESOURCE_END' to 'i < PCI_STD_NUM_BARS'.

  Refactor loops to use 'i < PCI_STD_NUM_BARS' instead of 'i <=
  PCI_STD_RESOURCE_END'.

See https://chris.beams.io/posts/git-commit/

> Signed-off-by: Denis Efremov <efremov@...ux.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c | 4 ++--
>  drivers/net/ethernet/synopsys/dwc-xlgmac-pci.c   | 2 +-
>  2 files changed, 3 insertions(+), 3 deletions(-)

This patch touches two unrelated drivers and should be split up.
When you do that, pay attention to the convention for commit log
prefixes, e.g.,

  $ git log --oneline drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
  37e9c087c814 stmmac: pci: Fix typo in IOT2000 comment
  d4a62ea411f9 stmmac: pci: Use pci_dev_id() helper
  e0c1d14a1a32 stmmac: pci: Adjust IOT2000 matching

  $ git log --oneline drivers/net/ethernet/synopsys/dwc-xlgmac-pci.c
  ea8c1c642ea5 net: dwc-xlgmac: declaration of dual license in headers
  65e0ace2c5cd net: dwc-xlgmac: Initial driver for DesignWare Enterprise Ethernet

> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
> index 86f9c07a38cf..cfe496cdd78b 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
> @@ -258,7 +258,7 @@ static int stmmac_pci_probe(struct pci_dev *pdev,
>  	}
>  
>  	/* Get the base address of device */
> -	for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
> +	for (i = 0; i < PCI_STD_NUM_BARS; i++) {
>  		if (pci_resource_len(pdev, i) == 0)
>  			continue;
>  		ret = pcim_iomap_regions(pdev, BIT(i), pci_name(pdev));
> @@ -296,7 +296,7 @@ static void stmmac_pci_remove(struct pci_dev *pdev)
>  
>  	stmmac_dvr_remove(&pdev->dev);
>  
> -	for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
> +	for (i = 0; i < PCI_STD_NUM_BARS; i++) {
>  		if (pci_resource_len(pdev, i) == 0)
>  			continue;
>  		pcim_iounmap_regions(pdev, BIT(i));
> diff --git a/drivers/net/ethernet/synopsys/dwc-xlgmac-pci.c b/drivers/net/ethernet/synopsys/dwc-xlgmac-pci.c
> index 386bafe74c3f..fa8604d7b797 100644
> --- a/drivers/net/ethernet/synopsys/dwc-xlgmac-pci.c
> +++ b/drivers/net/ethernet/synopsys/dwc-xlgmac-pci.c
> @@ -34,7 +34,7 @@ static int xlgmac_probe(struct pci_dev *pcidev, const struct pci_device_id *id)
>  		return ret;
>  	}
>  
> -	for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
> +	for (i = 0; i < PCI_STD_NUM_BARS; i++) {
>  		if (pci_resource_len(pcidev, i) == 0)
>  			continue;
>  		ret = pcim_iomap_regions(pcidev, BIT(i), XLGMAC_DRV_NAME);
> -- 
> 2.21.0
>