On 04/11/15 18:56, David Miller wrote:

quoted

Fixes: fd867d51f889 ("net/core: generic support for disabling netdev features down stack")

 ...

quoted

Reported-by: Nikolay Aleksandrov <redacted>
Signed-off-by: Jarod Wilson <redacted>
---
v2: Based on suggestions from Alex, and with not changing err to ret, this
patch actually becomes quite minimal and doesn't ugly up the code much.

Applied, thanks.

This causes some warnings to be displayed for DSA stacked devices:

[    1.272297] brcm-sf2 f0b00000.ethernet_switch: Starfighter 2 top:
4.00, core: 2.00 base: 0xf0c80000, IRQs: 68, 69
[    1.283181] libphy: dsa slave smi: probed
[    1.344088] f0b403c0.mdio:05: Broadcom BCM7445 PHY revision: 0xd0,
patch: 3
[    1.658917] brcm-sf2 f0b00000.ethernet_switch gphy (uninitialized):
attached PHY at address 5 [Broadcom BCM7445]
[    1.669414] brcm-sf2 f0b00000.ethernet_switch gphy: set_features()
failed (-1); wanted 0x0000000000004020, left 0x0000000000004820
[    1.734202] brcm-sf2 f0b00000.ethernet_switch rgmii_1
(uninitialized): attached PHY at address 0 [Generic PHY]
[    1.744486] brcm-sf2 f0b00000.ethernet_switch rgmii_1: set_features()
failed (-1); wanted 0x0000000000004020, left 0x0000000000004820
[    1.809091] brcm-sf2 f0b00000.ethernet_switch rgmii_2
(uninitialized): attached PHY at address 1 [Generic PHY]
[    1.819364] brcm-sf2 f0b00000.ethernet_switch rgmii_2: set_features()
failed (-1); wanted 0x0000000000004020, left 0x0000000000004820
[    1.884090] brcm-sf2 f0b00000.ethernet_switch moca (uninitialized):
attached PHY at address 2 [Generic PHY]
[    1.894109] brcm-sf2 f0b00000.ethernet_switch moca: set_features()
failed (-1); wanted 0x0000000000004020, left 0x0000000000004820

DSA slave network devices are not associated with their master network
device using the typical lower/upper netdev helpers.

I do not have a good fix to come up with yet, but if you see something
obvious with net/dsa/slave.c, feel free to send patches for testing, I
can boot net-next on this platform.
-- 
Florian