linux-kernel - Re: [PATCH net] xgene: Don't fail probe, if there is no clk resource for SGMII interfaces

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Message-ID: <20170727213915.GA4902@alpha.franken.de>
Date:   Thu, 27 Jul 2017 23:39:15 +0200
From:   Tom Bogendoerfer <tsbogend@...ha.franken.de>
To:     Laura Abbott <labbott@...hat.com>
Cc:     isubramanian@....com, kchudgar@....com, qnguyen@....com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] xgene: Don't fail probe, if there is no clk resource
 for SGMII interfaces

On Thu, Jul 27, 2017 at 02:03:42PM -0700, Laura Abbott wrote:
> This change causes boot failures for me on my APM Mustang system running
> Fedora rawhide:
> 
> [   16.669089] Synchronous External Abort: synchronous external abort (0x9600000
> [   16.669099] Internal error: : 96000010 [#1] SMP                              
> [   16.669103] Modules linked in: xgene_enet(+) at803x realtek mdio_xgene xgenes
> [   16.669127] CPU: 2 PID: 534 Comm: systemd-udevd Not tainted 4.13.0-0.rc1.git1
> [   16.669128] Hardware name: AppliedMicro X-Gene Mustang Board/X-Gene Mustang 6
> [   16.669131] task: ffff8003e6f8ce00 task.stack: ffff8003e4fd8000              
> [   16.669144] PC is at xgene_enet_wr_mac+0xa0/0x128 [xgene_enet]               
> [   16.669152] LR is at xgene_enet_wr_mac+0x64/0x128 [xgene_enet] 

on the first glance I don't see anything clock related there.

What firmware version is installed on your mustang board ? I saw
ethernet related crashes with mustang boards because the device tree
in firmware was too old for the xgene ethernet driver.

Thoms.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]