linux-kernel - Re: bnx2 breaks Dell R815 BMC IPMI since 4.8

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Date:   Wed, 30 Nov 2016 00:38:06 +0100
From:   Brice Goglin <brice.goglin@...ia.fr>
To:     Gavin Shan <gwshan@...ux.vnet.ibm.com>
Subject: Re: bnx2 breaks Dell R815 BMC IPMI since 4.8



Le 30 novembre 2016 00:28:08 GMT+01:00, Gavin Shan <gwshan@...ux.vnet.ibm.com> a écrit :
>On Tue, Nov 29, 2016 at 07:57:51AM +0100, Brice Goglin wrote:
>>Hello
>>
>>My Dell PowerEdge R815 doesn't have IPMI anymore when I boot a 4.8
>>kernel, the BMC doesn't even ping anymore. Its Ethernet devices are 4
>of
>>those:
>>
>>01:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709
>Gigabit Ethernet (rev 20)
>>	DeviceName: Embedded NIC 1                          
>>	Subsystem: Dell NetXtreme II BCM5709 Gigabit Ethernet
>>	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
>Stepping- SERR- FastB2B- DisINTx+
>>	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
><TAbort- <MAbort- >SERR- <PERR- INTx-
>>	Latency: 0, Cache Line Size: 64 bytes
>>	Interrupt: pin A routed to IRQ 42
>>	Region 0: Memory at e6000000 (64-bit, non-prefetchable) [size=32M]
>>	Capabilities: <access denied>
>>	Kernel driver in use: bnx2
>>	Kernel modules: bnx2
>>
>>The only change in bnx2 between 4.7 and 4.8 appears to be this one:
>>
>>commit 3e1be7ad2d38c6bd6aeef96df9bd0a7822f4e51c
>>Author: Baoquan He <bhe@...hat.com>
>>Date:   Fri Sep 9 22:43:12 2016 +0800
>>
>>    bnx2: Reset device during driver initialization
>>
>>Could you patch actually break the BMC? What do I need to further
>debug
>>this issue?
>>
>
>Brice, could you please confirm NCSI is enabled on BMC? It seems NCSI
>AEN pakets aren't handled by NCSI stack on BMC side when resetting NIC
>on host side. Those AEN packets usually help to reconfigure the
>(active)
>NCSI channel and bring it back to service after the reset.


I don't remember ever seeing the name NCSI in those Dell BMC configs. Any other word to look for?

By the way, the bug is gone in 4.8.11.

Brice