From 6e899e6c51320dd340ccc7a3d4391cedd0ba275b Mon Sep 17 00:00:00 2001 From: Neil Armstrong Date: Thu, 22 Oct 2015 10:37:53 +0200 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx.c | 46 ++++++++----------------------------- 1 file changed, 9 insertions(+), 37 deletions(-) diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index 7af96309bc07..b1b14f519d8b 100644 --- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -24,34 +24,6 @@ #include #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 @@ static int mv88e6xxx_reg_wait_ready(struct mii_bus *bus, int sw_addr) 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 __mv88e6xxx_reg_read(struct mii_bus *bus, int sw_addr, int addr, int reg) 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 @@ int __mv88e6xxx_reg_read(struct mii_bus *bus, int sw_addr, int addr, int reg) 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 @@ int __mv88e6xxx_reg_read(struct mii_bus *bus, int sw_addr, int addr, int reg) 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 __mv88e6xxx_reg_write(struct mii_bus *bus, int sw_addr, int addr, 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 @@ int __mv88e6xxx_reg_write(struct mii_bus *bus, int sw_addr, int addr, 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; -- 2.30.2