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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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12
drivers/net/ethernet/mscc/ocelot_board.c
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@@ -364,12 +364,12 @@ static int mscc_ocelot_probe(struct platform_device *pdev)
for_each_available_child_of_node(ports, portnp) {
struct device_node *phy_node;
phy_interface_t phy_mode;
struct phy_device *phy;
struct resource *res;
struct phy *serdes;
void __iomem *regs;
char res_name[8];
int phy_mode;
u32 port;
if (of_property_read_u32(portnp, "reg", &port))
@@ -398,11 +398,11 @@ static int mscc_ocelot_probe(struct platform_device *pdev)
goto out_put_ports;
}
phy_mode = of_get_phy_mode(portnp);
if (phy_mode < 0)
ocelot->ports[port]->phy_mode = PHY_INTERFACE_MODE_NA;
else
ocelot->ports[port]->phy_mode = phy_mode;
err = of_get_phy_mode(portnp, &phy_mode);
if (err && err != -ENODEV)
goto out_put_ports;
ocelot->ports[port]->phy_mode = phy_mode;
switch (ocelot->ports[port]->phy_mode) {
case PHY_INTERFACE_MODE_NA: