netdev - Re: AM43x boot broken on linux-next

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Date:   Wed, 10 Jan 2018 15:47:14 +0530
From:   Keerthy <j-keerthy@...com>
To:     <linux-omap@...r.kernel.org>, <rmk+kernel@...linux.org.uk>,
        <tony@...mide.com>
CC:     Grygorii Strashko <grygorii.strashko@...com>,
        <netdev@...r.kernel.org>, Sekhar Nori <nsekhar@...com>, <nm@...com>
Subject: Re: AM43x boot broken on linux-next



On Tuesday 09 January 2018 03:22 PM, Keerthy wrote:
> On Tuesday 09 January 2018 02:03 PM, Keerthy wrote:
>> Hi,
> 
> Adding netdev@...r.kernel.org
> 
>>
>> Seems like AM437x boot is broken on latest linux-next.
>> Log here:
>>
>> https://pastebin.ubuntu.com/26351906/

Git bisect pointed me to this patch:

commit fea23fb591cce99546baca043d2a068228e87a79
Author: Russell King <rmk+kernel@...linux.org.uk>
Date:   Tue Jan 2 10:58:58 2018 +0000

    net: phy: convert read-modify-write to phy_modify()

I saw that there was a double negation issue there and i moved to
Russell's fix patch:

commit f102852f980eac250855504c18f195900616deec
Author: Russell King <rmk+kernel@...linux.org.uk>
Date:   Fri Jan 5 16:07:10 2018 +0000

    net: phy: fix wrong masks to phy_modify()

Even with this fix commit i am seeing issues.

I reverted the fix and the original patch on linux-next and that solves
the issue.

So there is more to fix in the original patch IMHO.

>>
>> "Unable to handle kernel paging request at virtual address 000013e8
>> [    2.367045] pgd = c0350bf7
>> [    2.370019] [000013e8] *pgd=00000000
>> [    2.373823] Internal error: Oops: 5 [#1] SMP ARM
>> [    2.378709] Modules linked in:
>> [    2.381949] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
>> 4.15.0-rc6-next-20180108-38410-g895c0dd #4
>> [    2.391242] Hardware name: Generic AM43 (Flattened Device Tree)
>> [    2.397523] PC is at phy_attached_print+0xc/0x10c
>> [    2.402506] LR is at cpsw_slave_open+0x16c/0x258"
>>
>> Regards,
>> Keerthy
>>