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Date: Wed, 1 Nov 2023 21:58:08 +0200
From: George Shuklin <george.shuklin@...il.com>
To: Pavan Chebbi <pavan.chebbi@...adcom.com>
Cc: netdev@...r.kernel.org, Andrew Gospodarek
 <andrew.gospodarek@...adcom.com>, Michael Chan <michael.chan@...adcom.com>
Subject: Re: [PATCH] [PATCH net] tg3: power down device only on
 SYSTEM_POWER_OFF

On 01/11/2023 17:20, Pavan Chebbi wrote:
> On Wed, Nov 1, 2023 at 6:34 PM George Shuklin <george.shuklin@...il.com> wrote:
>> Dell R650xs servers hangs if tg3 driver calls tg3_power_down.
>>
>> This happens only if network adapters (BCM5720 for R650xs) were
>> initialized using SNP (e.g. by booting ipxe.efi).
>>
>> This is partial revert of commit 2ca1c94ce0b.
>>
>> The actual problem is on Dell side, but this fix allow servers
>> to come back alive after reboot.
> How are you sure that the problem solved by 2ca1c94ce0b is not
> reintroduced with this change?

I contacted the author of original patch, no reply yet (1st day). Also, 
I tested it on few generations of available Dell servers (R330, R340, 
R350 and R650sx, for which this fix should help). It does produce log 
message from 
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1917471, but, at 
least, it reboots without issues.

Actually, original patch is regression: 5.19 rebooting just fine, 6.0 
start to hang. I also reported it to dell support forum, but I'm not 
sure if they pick it up or not.

What would be the proper course of actions for such problem (outside of 
fixing UEFI SNP, for which I don't have access to sources)?


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