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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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7
include/linux/of_net.h
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@@ -6,15 +6,18 @@
#ifndef __LINUX_OF_NET_H
#define __LINUX_OF_NET_H
#include <linux/phy.h>
#ifdef CONFIG_OF_NET
#include <linux/of.h>
struct net_device;
extern int of_get_phy_mode(struct device_node *np);
extern int of_get_phy_mode(struct device_node *np, phy_interface_t *interface);
extern const void *of_get_mac_address(struct device_node *np);
extern struct net_device *of_find_net_device_by_node(struct device_node *np);
#else
static inline int of_get_phy_mode(struct device_node *np)
static inline int of_get_phy_mode(struct device_node *np,
phy_interface_t *interface)
{
return -ENODEV;
}