[PATCH net-next] net: pcs: pcs-lynx: remove lynx_get_mdio_device() and refactor cleanup

[Maxime Chevallier <maxime.chevallier@bootlin.com>]

As of today, the lynx_get_mdio_device() function is only used during the
cleanup phase, to free the underlying mdio_device. This can be
factored inside lynx_pcs_destroy().

Part of the effort driving this is the merge of pcs-altera-tse into
pcs-lynx, as both have very similar register layouts. One of the main
difference is that the TSE pcs is memory-mapped, and the merge into
pcs-lynx would first require a conversion of pcs-lynx to regmap.

Removing lynx_get_mdio_device() makes pcs-lynx somewhat less
mdio-specific.

The following drivers have been trivialy modified to account for the
modification :
 - felix_vsc9959.c
 - seville_vsc9953.c
 - enetc_pf.c
 - fman_memac.c

For dpaa2-mac.c, the cleanup sequence used put_device(&mdio->dev), which
is exactly what mdio_device_free(mdio) does.

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
---
Although this patch covers multiple drivers, it was kept as a single
patch to keep things bisectable. It was also only compile-tested, any
review and test is very welcome.

 drivers/net/dsa/ocelot/felix_vsc9959.c           |  3 ---
 drivers/net/dsa/ocelot/seville_vsc9953.c         |  3 ---
 drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c |  4 ----
 drivers/net/ethernet/freescale/enetc/enetc_pf.c  |  8 ++------
 drivers/net/ethernet/freescale/fman/fman_memac.c |  4 ----
 drivers/net/pcs/pcs-lynx.c                       | 10 ++--------
 include/linux/pcs-lynx.h                         |  2 --
 7 files changed, 4 insertions(+), 30 deletions(-)

diff --git a/drivers/net/dsa/ocelot/felix_vsc9959.c b/drivers/net/dsa/ocelot/felix_vsc9959.c
index 43dc8ed4854d..1696d1eaa570 100644
--- a/drivers/net/dsa/ocelot/felix_vsc9959.c
+++ b/drivers/net/dsa/ocelot/felix_vsc9959.c
@@ -1054,13 +1054,10 @@ static void vsc9959_mdio_bus_free(struct ocelot *ocelot)
 
 	for (port = 0; port < ocelot->num_phys_ports; port++) {
 		struct phylink_pcs *phylink_pcs = felix->pcs[port];
-		struct mdio_device *mdio_device;
 
 		if (!phylink_pcs)
 			continue;
 
-		mdio_device = lynx_get_mdio_device(phylink_pcs);
-		mdio_device_free(mdio_device);
 		lynx_pcs_destroy(phylink_pcs);
 	}
 	mdiobus_unregister(felix->imdio);
diff --git a/drivers/net/dsa/ocelot/seville_vsc9953.c b/drivers/net/dsa/ocelot/seville_vsc9953.c
index 88ed3a2e487a..0f7b947cb43b 100644
--- a/drivers/net/dsa/ocelot/seville_vsc9953.c
+++ b/drivers/net/dsa/ocelot/seville_vsc9953.c
@@ -946,13 +946,10 @@ static void vsc9953_mdio_bus_free(struct ocelot *ocelot)
 
 	for (port = 0; port < ocelot->num_phys_ports; port++) {
 		struct phylink_pcs *phylink_pcs = felix->pcs[port];
-		struct mdio_device *mdio_device;
 
 		if (!phylink_pcs)
 			continue;
 
-		mdio_device = lynx_get_mdio_device(phylink_pcs);
-		mdio_device_free(mdio_device);
 		lynx_pcs_destroy(phylink_pcs);
 	}
 
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
index c886f33f8c6f..c4733c46c896 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
@@ -284,11 +284,7 @@ static void dpaa2_pcs_destroy(struct dpaa2_mac *mac)
 	struct phylink_pcs *phylink_pcs = mac->pcs;
 
 	if (phylink_pcs) {
-		struct mdio_device *mdio = lynx_get_mdio_device(phylink_pcs);
-		struct device *dev = &mdio->dev;
-
 		lynx_pcs_destroy(phylink_pcs);
-		put_device(dev);
 		mac->pcs = NULL;
 	}
 }
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
index 7facc7d5261e..39940bd25b8d 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
@@ -915,13 +915,9 @@ static int enetc_imdio_create(struct enetc_pf *pf)
 
 static void enetc_imdio_remove(struct enetc_pf *pf)
 {
-	struct mdio_device *mdio_device;
-
-	if (pf->pcs) {
-		mdio_device = lynx_get_mdio_device(pf->pcs);
-		mdio_device_free(mdio_device);
+	if (pf->pcs)
 		lynx_pcs_destroy(pf->pcs);
-	}
+
 	if (pf->imdio) {
 		mdiobus_unregister(pf->imdio);
 		mdiobus_free(pf->imdio);
diff --git a/drivers/net/ethernet/freescale/fman/fman_memac.c b/drivers/net/ethernet/freescale/fman/fman_memac.c
index 9349f841bd06..555729c7c67e 100644
--- a/drivers/net/ethernet/freescale/fman/fman_memac.c
+++ b/drivers/net/ethernet/freescale/fman/fman_memac.c
@@ -976,14 +976,10 @@ static int memac_init(struct fman_mac *memac)
 
 static void pcs_put(struct phylink_pcs *pcs)
 {
-	struct mdio_device *mdiodev;
-
 	if (IS_ERR_OR_NULL(pcs))
 		return;
 
-	mdiodev = lynx_get_mdio_device(pcs);
 	lynx_pcs_destroy(pcs);
-	mdio_device_free(mdiodev);
 }
 
 static int memac_free(struct fman_mac *memac)
diff --git a/drivers/net/pcs/pcs-lynx.c b/drivers/net/pcs/pcs-lynx.c
index 3903f3baba2b..4457298f7fb8 100644
--- a/drivers/net/pcs/pcs-lynx.c
+++ b/drivers/net/pcs/pcs-lynx.c
@@ -34,14 +34,6 @@ enum sgmii_speed {
 #define phylink_pcs_to_lynx(pl_pcs) container_of((pl_pcs), struct lynx_pcs, pcs)
 #define lynx_to_phylink_pcs(lynx) (&(lynx)->pcs)
 
-struct mdio_device *lynx_get_mdio_device(struct phylink_pcs *pcs)
-{
-	struct lynx_pcs *lynx = phylink_pcs_to_lynx(pcs);
-
-	return lynx->mdio;
-}
-EXPORT_SYMBOL(lynx_get_mdio_device);
-
 static void lynx_pcs_get_state_usxgmii(struct mdio_device *pcs,
 				       struct phylink_link_state *state)
 {
@@ -335,6 +327,8 @@ void lynx_pcs_destroy(struct phylink_pcs *pcs)
 {
 	struct lynx_pcs *lynx = phylink_pcs_to_lynx(pcs);
 
+	mdio_device_free(lynx->mdio);
+
 	kfree(lynx);
 }
 EXPORT_SYMBOL(lynx_pcs_destroy);
diff --git a/include/linux/pcs-lynx.h b/include/linux/pcs-lynx.h
index 5712cc2ce775..d8327323ddf7 100644
--- a/include/linux/pcs-lynx.h
+++ b/include/linux/pcs-lynx.h
@@ -9,8 +9,6 @@
 #include <linux/mdio.h>
 #include <linux/phylink.h>
 
-struct mdio_device *lynx_get_mdio_device(struct phylink_pcs *pcs);
-
 struct phylink_pcs *lynx_pcs_create(struct mdio_device *mdio);
 
 void lynx_pcs_destroy(struct phylink_pcs *pcs);
-- 
2.39.1