2020-12-03 22:40:15

by Arnd Bergmann

[permalink] [raw]
Subject: [PATCH] enetc: fix build warning

From: Arnd Bergmann <[email protected]>

When CONFIG_OF is disabled, there is a harmless warning about
an unused variable:

enetc_pf.c: In function 'enetc_phylink_create':
enetc_pf.c:981:17: error: unused variable 'dev' [-Werror=unused-variable]

Slightly rearrange the code to pass around the of_node as a
function argument, which avoids the problem without hurting
readability.

Fixes: 71b77a7a27a3 ("enetc: Migrate to PHYLINK and PCS_LYNX")
Signed-off-by: Arnd Bergmann <[email protected]>
---
.../net/ethernet/freescale/enetc/enetc_pf.c | 21 +++++++++----------
1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
index ecdc2af8c292..e1269ab4f2e4 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
@@ -851,13 +851,12 @@ static bool enetc_port_has_pcs(struct enetc_pf *pf)
pf->if_mode == PHY_INTERFACE_MODE_USXGMII);
}

-static int enetc_mdiobus_create(struct enetc_pf *pf)
+static int enetc_mdiobus_create(struct enetc_pf *pf, struct device_node *node)
{
- struct device *dev = &pf->si->pdev->dev;
struct device_node *mdio_np;
int err;

- mdio_np = of_get_child_by_name(dev->of_node, "mdio");
+ mdio_np = of_get_child_by_name(node, "mdio");
if (mdio_np) {
err = enetc_mdio_probe(pf, mdio_np);

@@ -969,18 +968,17 @@ static const struct phylink_mac_ops enetc_mac_phylink_ops = {
.mac_link_down = enetc_pl_mac_link_down,
};

-static int enetc_phylink_create(struct enetc_ndev_priv *priv)
+static int enetc_phylink_create(struct enetc_ndev_priv *priv,
+ struct device_node *node)
{
struct enetc_pf *pf = enetc_si_priv(priv->si);
- struct device *dev = &pf->si->pdev->dev;
struct phylink *phylink;
int err;

pf->phylink_config.dev = &priv->ndev->dev;
pf->phylink_config.type = PHYLINK_NETDEV;

- phylink = phylink_create(&pf->phylink_config,
- of_fwnode_handle(dev->of_node),
+ phylink = phylink_create(&pf->phylink_config, of_fwnode_handle(node),
pf->if_mode, &enetc_mac_phylink_ops);
if (IS_ERR(phylink)) {
err = PTR_ERR(phylink);
@@ -1005,9 +1003,10 @@ static int enetc_pf_probe(struct pci_dev *pdev,
struct net_device *ndev;
struct enetc_si *si;
struct enetc_pf *pf;
+ struct device_node *node = pdev->dev.of_node;
int err;

- if (pdev->dev.of_node && !of_device_is_available(pdev->dev.of_node)) {
+ if (node && !of_device_is_available(node)) {
dev_info(&pdev->dev, "device is disabled, skipping\n");
return -ENODEV;
}
@@ -1058,12 +1057,12 @@ static int enetc_pf_probe(struct pci_dev *pdev,
goto err_alloc_msix;
}

- if (!of_get_phy_mode(pdev->dev.of_node, &pf->if_mode)) {
- err = enetc_mdiobus_create(pf);
+ if (!of_get_phy_mode(node, &pf->if_mode)) {
+ err = enetc_mdiobus_create(pf, node);
if (err)
goto err_mdiobus_create;

- err = enetc_phylink_create(priv);
+ err = enetc_phylink_create(priv, node);
if (err)
goto err_phylink_create;
}
--
2.27.0


2020-12-04 12:21:39

by Claudiu Manoil

[permalink] [raw]
Subject: RE: [PATCH] enetc: fix build warning

>-----Original Message-----
>From: Arnd Bergmann <[email protected]>
>Sent: Friday, December 4, 2020 12:37 AM
[...]
>Subject: [PATCH] enetc: fix build warning
>
>From: Arnd Bergmann <[email protected]>
>
>When CONFIG_OF is disabled, there is a harmless warning about
>an unused variable:
>
>enetc_pf.c: In function 'enetc_phylink_create':
>enetc_pf.c:981:17: error: unused variable 'dev' [-Werror=unused-variable]
>
>Slightly rearrange the code to pass around the of_node as a
>function argument, which avoids the problem without hurting
>readability.
>
>Fixes: 71b77a7a27a3 ("enetc: Migrate to PHYLINK and PCS_LYNX")
>Signed-off-by: Arnd Bergmann <[email protected]>

Very nice cleanup, the code looks much better like this.
For some reason this patch is marked as "Not applicable" in patchwork.
So I took the patch, made a small cosmetic change (see nit below), added a more
verbose subject line, tested and resent it, patchwork link here:
https://patchwork.ozlabs.org/project/netdev/patch/[email protected]/

Thanks.

>---
> .../net/ethernet/freescale/enetc/enetc_pf.c | 21 +++++++++----------
>@@ -1005,9 +1003,10 @@ static int enetc_pf_probe(struct pci_dev *pdev,
> struct net_device *ndev;
> struct enetc_si *si;
> struct enetc_pf *pf;
>+ struct device_node *node = pdev->dev.of_node;

Nit: move this long line to the top (reverse tree)

2020-12-04 16:55:57

by Jakub Kicinski

[permalink] [raw]
Subject: Re: [PATCH] enetc: fix build warning

On Fri, 4 Dec 2020 12:18:16 +0000 Claudiu Manoil wrote:
> >-----Original Message-----
> >From: Arnd Bergmann <[email protected]>
> >Sent: Friday, December 4, 2020 12:37 AM
> [...]
> >Subject: [PATCH] enetc: fix build warning
> >
> >From: Arnd Bergmann <[email protected]>
> >
> >When CONFIG_OF is disabled, there is a harmless warning about
> >an unused variable:
> >
> >enetc_pf.c: In function 'enetc_phylink_create':
> >enetc_pf.c:981:17: error: unused variable 'dev' [-Werror=unused-variable]
> >
> >Slightly rearrange the code to pass around the of_node as a
> >function argument, which avoids the problem without hurting
> >readability.
> >
> >Fixes: 71b77a7a27a3 ("enetc: Migrate to PHYLINK and PCS_LYNX")
> >Signed-off-by: Arnd Bergmann <[email protected]>
>
> Very nice cleanup, the code looks much better like this.
> For some reason this patch is marked as "Not applicable" in patchwork.
> So I took the patch, made a small cosmetic change (see nit below), added a more
> verbose subject line, tested and resent it, patchwork link here:
> https://patchwork.ozlabs.org/project/netdev/patch/[email protected]/

We switched to a different PW instance:

https://patchwork.kernel.org/project/netdevbpf/patch/[email protected]/

> >---
> > .../net/ethernet/freescale/enetc/enetc_pf.c | 21 +++++++++----------
> >@@ -1005,9 +1003,10 @@ static int enetc_pf_probe(struct pci_dev *pdev,
> > struct net_device *ndev;
> > struct enetc_si *si;
> > struct enetc_pf *pf;
> >+ struct device_node *node = pdev->dev.of_node;
>
> Nit: move this long line to the top (reverse tree)

Now it's gonna get marked as changes requested ;)