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net: of_get_phy_mode: Change API to solve int/unit warnings

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Before this change of_get_phy_mode() returned an enum,
phy_interface_t. On error, -ENODEV etc, is returned. If the result of
the function is stored in a variable of type phy_interface_t, and the
compiler has decided to represent this as an unsigned int, comparision
with -ENODEV etc, is a signed vs unsigned comparision.

Fix this problem by changing the API. Make the function return an
error, or 0 on success, and pass a pointer, of type phy_interface_t,
where the phy mode should be stored.

v2:
Return with *interface set to PHY_INTERFACE_MODE_NA on error.
Add error checks to all users of of_get_phy_mode()
Fixup a few reverse christmas tree errors
Fixup a few slightly malformed reverse christmas trees

v3:
Fix 0-day reported errors.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn
2019-11-04 02:40:33 +01:00
committed by David S. Miller
parent 5d1fcaf35d
commit 0c65b2b90d
53 changed files with 201 additions and 149 deletions
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6
drivers/net/ethernet/faraday/ftgmac100.c
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@@ -1612,7 +1612,7 @@ static int ftgmac100_setup_mdio(struct net_device *netdev)
{
struct ftgmac100 *priv = netdev_priv(netdev);
struct platform_device *pdev = to_platform_device(priv->dev);
int phy_intf = PHY_INTERFACE_MODE_RGMII;
phy_interface_t phy_intf = PHY_INTERFACE_MODE_RGMII;
struct device_node *np = pdev->dev.of_node;
int i, err = 0;
u32 reg;
@@ -1637,8 +1637,8 @@ static int ftgmac100_setup_mdio(struct net_device *netdev)
/* Get PHY mode from device-tree */
if (np) {
/* Default to RGMII. It's a gigabit part after all */
phy_intf = of_get_phy_mode(np);
if (phy_intf < 0)
err = of_get_phy_mode(np, &phy_intf);
if (err)
phy_intf = PHY_INTERFACE_MODE_RGMII;
/* Aspeed only supports these. I don't know about other IP