Reviewed-by: Cheng Jian cj.chengjian@huawei.com
在 2021/10/23 17:18, dqh 写道:
From: Dan Carpenter <dan.carpenter(a)oracle.com>
stable inclusion from stable-v5.10.44 commit be23c4af3d8a1b986fe9b43b8966797653a76ca4 bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=341 CVE: NA
[ Upstream commit 1dde47a66d4fb181830d6fa000e5ea86907b639e ]
We spotted a bug recently during a review where a driver was unregistering a bus that wasn't registered, which would trigger this BUG_ON(). Let's handle that situation more gracefully, and just print a warning and return.
Reported-by: Russell King (Oracle) <rmk+kernel(a)armlinux.org.uk> Signed-off-by: Dan Carpenter <dan.carpenter(a)oracle.com> Reviewed-by: Russell King (Oracle) <rmk+kernel(a)armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew(a)lunn.ch> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: wangqing <wangqing(a)uniontech.com> Reviewed-by: Xie XiuQi xiexiuqi@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com
drivers/net/phy/mdio_bus.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index 757e950fb745..b848439fa837 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -608,7 +608,8 @@ void mdiobus_unregister(struct mii_bus *bus) struct mdio_device *mdiodev; int i;
- BUG_ON(bus->state != MDIOBUS_REGISTERED);
if (WARN_ON_ONCE(bus->state != MDIOBUS_REGISTERED))
return;bus->state = MDIOBUS_UNREGISTERED;
for (i = 0; i < PHY_MAX_ADDR; i++) {
-
chengjian (D)