linux-stable.git/drivers/net/dsa/dsa_loop.c, branch linux-5.4.y

net: dsa: Fix possible memory leaks in dsa_loop_init()

2022-11-10T16:57:50+00:00

[ Upstream commit 633efc8b3dc96f56f5a57f2a49764853a2fa3f50 ]

kmemleak reported memory leaks in dsa_loop_init():

kmemleak: 12 new suspected memory leaks

unreferenced object 0xffff8880138ce000 (size 2048):
  comm "modprobe", pid 390, jiffies 4295040478 (age 238.976s)
  backtrace:
    [<000000006a94f1d5>] kmalloc_trace+0x26/0x60
    [<00000000a9c44622>] phy_device_create+0x5d/0x970
    [<00000000d0ee2afc>] get_phy_device+0xf3/0x2b0
    [<00000000dca0c71f>] __fixed_phy_register.part.0+0x92/0x4e0
    [<000000008a834798>] fixed_phy_register+0x84/0xb0
    [<0000000055223fcb>] dsa_loop_init+0xa9/0x116 [dsa_loop]
    ...

There are two reasons for memleak in dsa_loop_init().

First, fixed_phy_register() create and register phy_device:

fixed_phy_register()
  get_phy_device()
    phy_device_create() # freed by phy_device_free()
  phy_device_register() # freed by phy_device_remove()

But fixed_phy_unregister() only calls phy_device_remove().
So the memory allocated in phy_device_create() is leaked.

Second, when mdio_driver_register() fail in dsa_loop_init(),
it just returns and there is no cleanup for phydevs.

Fix the problems by catching the error of mdio_driver_register()
in dsa_loop_init(), then calling both fixed_phy_unregister() and
phy_device_free() to release phydevs.
Also add a function for phydevs cleanup to avoid duplacate.

Fixes: 98cd1552ea27 ("net: dsa: Mock-up driver")
Signed-off-by: Chen Zhongjin 
Signed-off-by: David S. Miller 
Signed-off-by: Sasha Levin

net: dsa: loop: Add module soft dependency

2020-05-20T06:20:11+00:00

[ Upstream commit 3047211ca11bf77b3ecbce045c0aa544d934b945 ]

There is a soft dependency against dsa_loop_bdinfo.ko which sets up the
MDIO device registration, since there are no symbols referenced by
dsa_loop.ko, there is no automatic loading of dsa_loop_bdinfo.ko which
is needed.

Fixes: 98cd1552ea27 ("net: dsa: Mock-up driver")
Signed-off-by: Florian Fainelli 
Signed-off-by: Jakub Kicinski 
Signed-off-by: Greg Kroah-Hartman

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman

net: phy: fixed-phy: Drop GPIO from fixed_phy_add()

2019-02-05T02:33:36+00:00

All users of the fixed_phy_add() pass -1 as GPIO number
to the fixed phy driver, and all users of fixed_phy_register()
pass -1 as GPIO number as well, except for the device
tree MDIO bus.

Any new users should create a proper device and pass the
GPIO as a descriptor associated with the device so delete
the GPIO argument from the calls and drop the code looking
requesting a GPIO in fixed_phy_add().

In fixed phy_register(), investigate the "fixed-link"
node and pick the GPIO descriptor from "link-gpios" if
this property exists. Move the corresponding code out
of of_mdio.c as the fixed phy code anyways requires
OF to be in use.

Tested-by: Andrew Lunn 
Signed-off-by: Linus Walleij 
Signed-off-by: David S. Miller

net: dsa: dsa_loop: Make dynamic debugging helpful

2018-05-25T20:46:29+00:00

Remove redundant debug prints from phy_read/write since we can trace those
calls through trace events. Enhance dynamic debug prints to print arguments
which helps figuring how what is going on at the driver level with higher level
configuration interfaces.

Signed-off-by: Florian Fainelli 
Reviewed-by: Andrew Lunn 
Signed-off-by: David S. Miller

net: dsa: loop: Hook PHY statistics

2018-04-27T15:53:03+00:00

We just return the same statistics through ethtool_get_stats() and
ethtool_get_phy_stats() for simplicity since this is just a mock-up driver.

Signed-off-by: Florian Fainelli 
Signed-off-by: David S. Miller

net: dsa: Pass stringset to ethtool operations

2018-04-27T15:53:03+00:00

Up until now we largely assumed that we were interested in ETH_SS_STATS
type of strings for all ethtool operations, this is about to change with
the introduction of additional string sets, e.g: ETH_SS_PHY_STATS.
Update all functions to take an appropriate stringset argument and act
on it when it is different than ETH_SS_STATS for now.

Signed-off-by: Florian Fainelli 
Signed-off-by: David S. Miller

dsa: Pass the port to get_sset_count()

2018-03-04T18:34:18+00:00

By passing the port, we allow different ports to have different
statistics. This is useful since some ports have SERDES interfaces
with their own statistic counters.

Signed-off-by: Andrew Lunn 
Tested-by: Florian Fainelli 
Reviewed-by: Vivien Didelot 
Signed-off-by: David S. Miller

net: dsa: remove trans argument from vlan ops

2017-12-03T02:18:55+00:00

The DSA switch VLAN ops pass the switchdev_trans structure down to the
drivers, but no one is using them and they aren't supposed to anyway.

Remove the trans argument from VLAN prepare and add operations.

At the same time, fix the following checkpatch warning:

    WARNING: line over 80 characters
    #74: FILE: drivers/net/dsa/dsa_loop.c:177:
    +				      const struct switchdev_obj_port_vlan *vlan)

Signed-off-by: Vivien Didelot 
Signed-off-by: David S. Miller

net: dsa: Pass a port to get_tag_protocol()

2017-11-13T01:34:54+00:00

A number of drivers want to check whether the configured CPU port is a
possible configuration for enabling tagging, pass down the CPU port
number so they verify that.

Signed-off-by: Florian Fainelli 
Reviewed-by: Vivien Didelot 
Reviewed-by: Andrew Lunn 
Signed-off-by: David S. Miller