diff mbox series

[v2,net-next,1/4] net: mdiobus: avoid BUG_ON() in mdiobus accessors

Message ID E1jEDZy-0008Ih-3D@rmk-PC.armlinux.org.uk
State New
Headers show
Series net: add phylink support for PCS | expand

Commit Message

Russell King (Oracle) March 17, 2020, 2:52 p.m. UTC 
Avoid using BUG_ON() in the mdiobus accessors, prefering instead to use
WARN_ON_ONCE() and returning an error.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
 drivers/net/phy/mdio_bus.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 3ab9ca7614d1..129e60630319 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -841,7 +841,8 @@  int mdiobus_read_nested(struct mii_bus *bus, int addr, u32 regnum)
 {
 	int retval;
 
-	BUG_ON(in_interrupt());
+	if (WARN_ON_ONCE(in_interrupt()))
+		return -EINVAL;
 
 	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
 	retval = __mdiobus_read(bus, addr, regnum);
@@ -865,7 +866,8 @@  int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum)
 {
 	int retval;
 
-	BUG_ON(in_interrupt());
+	if (WARN_ON_ONCE(in_interrupt()))
+		return -EINVAL;
 
 	mutex_lock(&bus->mdio_lock);
 	retval = __mdiobus_read(bus, addr, regnum);
@@ -893,7 +895,8 @@  int mdiobus_write_nested(struct mii_bus *bus, int addr, u32 regnum, u16 val)
 {
 	int err;
 
-	BUG_ON(in_interrupt());
+	if (WARN_ON_ONCE(in_interrupt()))
+		return -EINVAL;
 
 	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
 	err = __mdiobus_write(bus, addr, regnum, val);
@@ -918,7 +921,8 @@  int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val)
 {
 	int err;
 
-	BUG_ON(in_interrupt());
+	if (WARN_ON_ONCE(in_interrupt()))
+		return -EINVAL;
 
 	mutex_lock(&bus->mdio_lock);
 	err = __mdiobus_write(bus, addr, regnum, val);