[PATCH net] net: dsa: remove phy.h and phy_fixed.h inclusions

[Florian Fainelli]

There is no need to include phy.h nor phy_fixed.h when we can use
forward declarations instead to keep the include chain smaller.

Doing this unveiled that we were implicitely getting the definitions for
struct ethtool_eee and struct ethtool_wolinfo, and that net/dsa/slave.c
was missing an include of phy_fixed.h.

Fixes: ec9436baedb6 ("net: dsa: allow drivers to do link adjustment")
Fixes: ce31b31c68e7 ("net: dsa: allow updating fixed PHY link information")
Signed-off-by: Florian Fainelli <***@gmail.com>
---
include/net/dsa.h | 7 +++++--
net/dsa/slave.c | 1 +
2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 58ad8c6492db..0c38b083e6eb 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -16,8 +16,11 @@
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <linux/of.h>
-#include <linux/phy.h>
-#include <linux/phy_fixed.h>
+
+struct phy_device;
+struct fixed_phy_status;
+struct ethtool_eee;
+struct ethtool_wolinfo;

enum dsa_tag_protocol {
DSA_TAG_PROTO_NONE = 0,
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 8030489d9cbe..a851e9f14118 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -11,6 +11,7 @@
#include <linux/list.h>
#include <linux/etherdevice.h>
#include <linux/phy.h>
+#include <linux/phy_fixed.h>
#include <linux/of_net.h>
#include <linux/of_mdio.h>
#include "dsa_priv.h"

[David Miller]

From: Florian Fainelli <***@gmail.com>
Date: Thu, 16 Oct 2014 17:55:55 -0700

Post by Florian Fainelli
There is no need to include phy.h nor phy_fixed.h when we can use
forward declarations instead to keep the include chain smaller.
Doing this unveiled that we were implicitely getting the definitions for
struct ethtool_eee and struct ethtool_wolinfo, and that net/dsa/slave.c
was missing an include of phy_fixed.h.
Fixes: ec9436baedb6 ("net: dsa: allow drivers to do link adjustment")
Fixes: ce31b31c68e7 ("net: dsa: allow updating fixed PHY link information")

Please, don't do this.

Get the definitions from the header file that provides them.

The only situation where forward declarations done by hand like this
make sense is when there is absolutely no way to avoid looping header
includes.

For example in A.h you want to provide a function that takes a pointer
to foo, but foo is defined B.h which includes A.h first.

Thanks.