net: dsa: Make mv88e6xxx use nested mdiobus read/write
Make the mv88e6xxx driver use the previously introduced nested
variants of mdiobus_read/write functions.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index 7af9630..b1b14f5 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -24,34 +24,6 @@
#include <net/switchdev.h>
#include "mv88e6xxx.h"
-/* MDIO bus access can be nested in the case of PHYs connected to the
- * internal MDIO bus of the switch, which is accessed via MDIO bus of
- * the Ethernet interface. Avoid lockdep false positives by using
- * mutex_lock_nested().
- */
-static int mv88e6xxx_mdiobus_read(struct mii_bus *bus, int addr, u32 regnum)
-{
- int ret;
-
- mutex_lock_nested(&bus->mdio_lock, SINGLE_DEPTH_NESTING);
- ret = bus->read(bus, addr, regnum);
- mutex_unlock(&bus->mdio_lock);
-
- return ret;
-}
-
-static int mv88e6xxx_mdiobus_write(struct mii_bus *bus, int addr, u32 regnum,
- u16 val)
-{
- int ret;
-
- mutex_lock_nested(&bus->mdio_lock, SINGLE_DEPTH_NESTING);
- ret = bus->write(bus, addr, regnum, val);
- mutex_unlock(&bus->mdio_lock);
-
- return ret;
-}
-
/* If the switch's ADDR[4:0] strap pins are strapped to zero, it will
* use all 32 SMI bus addresses on its SMI bus, and all switch registers
* will be directly accessible on some {device address,register address}
@@ -66,7 +38,7 @@
int i;
for (i = 0; i < 16; i++) {
- ret = mv88e6xxx_mdiobus_read(bus, sw_addr, SMI_CMD);
+ ret = mdiobus_read_nested(bus, sw_addr, SMI_CMD);
if (ret < 0)
return ret;
@@ -82,7 +54,7 @@
int ret;
if (sw_addr == 0)
- return mv88e6xxx_mdiobus_read(bus, addr, reg);
+ return mdiobus_read_nested(bus, addr, reg);
/* Wait for the bus to become free. */
ret = mv88e6xxx_reg_wait_ready(bus, sw_addr);
@@ -90,8 +62,8 @@
return ret;
/* Transmit the read command. */
- ret = mv88e6xxx_mdiobus_write(bus, sw_addr, SMI_CMD,
- SMI_CMD_OP_22_READ | (addr << 5) | reg);
+ ret = mdiobus_write_nested(bus, sw_addr, SMI_CMD,
+ SMI_CMD_OP_22_READ | (addr << 5) | reg);
if (ret < 0)
return ret;
@@ -101,7 +73,7 @@
return ret;
/* Read the data. */
- ret = mv88e6xxx_mdiobus_read(bus, sw_addr, SMI_DATA);
+ ret = mdiobus_read_nested(bus, sw_addr, SMI_DATA);
if (ret < 0)
return ret;
@@ -145,7 +117,7 @@
int ret;
if (sw_addr == 0)
- return mv88e6xxx_mdiobus_write(bus, addr, reg, val);
+ return mdiobus_write_nested(bus, addr, reg, val);
/* Wait for the bus to become free. */
ret = mv88e6xxx_reg_wait_ready(bus, sw_addr);
@@ -153,13 +125,13 @@
return ret;
/* Transmit the data to write. */
- ret = mv88e6xxx_mdiobus_write(bus, sw_addr, SMI_DATA, val);
+ ret = mdiobus_write_nested(bus, sw_addr, SMI_DATA, val);
if (ret < 0)
return ret;
/* Transmit the write command. */
- ret = mv88e6xxx_mdiobus_write(bus, sw_addr, SMI_CMD,
- SMI_CMD_OP_22_WRITE | (addr << 5) | reg);
+ ret = mdiobus_write_nested(bus, sw_addr, SMI_CMD,
+ SMI_CMD_OP_22_WRITE | (addr << 5) | reg);
if (ret < 0)
return ret;
