netdev - Re: am335x: cpsw: interrupt failure

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Date:	Fri, 5 Dec 2014 11:03:44 +0100
From:	Yegor Yefremov <yegorslists@...glemail.com>
To:	Felipe Balbi <balbi@...com>
Cc:	netdev <netdev@...r.kernel.org>,
	"N, Mugunthan V" <mugunthanvnm@...com>
Subject: Re: am335x: cpsw: interrupt failure

On Thu, Dec 4, 2014 at 5:56 PM, Felipe Balbi <balbi@...com> wrote:
> Hi,
>
> On Thu, Dec 04, 2014 at 05:41:38PM +0100, Yegor Yefremov wrote:
>> I have following problem. My systems reboots at high network load
>> after this commit (found via git bissect):
>>
>> commit 55601c9f24670ba926ebdd4d712ac3b177232330
>> Author: Felipe Balbi <balbi@...com>
>> Date:   Mon Sep 8 17:54:58 2014 -0700
>>
>>     arm: omap: intc: switch over to linear irq domain
>>
>>     now that we don't need to support legacy board-files,
>>     we can completely switch over to a linear irq domain
>>     and make use of irq_alloc_domain_generic_chips() to
>>     allocate all generic irq chips for us.
>>
>>     Signed-off-by: Felipe Balbi <balbi@...com>
>>     Signed-off-by: Tony Lindgren <tony@...mide.com>
>>
>> and I get following error messages:
>>
>> irq 0, desc: cf004000, depth: 1, count: 0, unhandled: 0
>
> irq 0 ? Weird, that's not a valid IRQ.
>
>> ->handle_irq():  c0087fc0, handle_bad_irq+0x0/0x258
>> ->irq_data.chip(): c08e7174, no_irq_chip+0x0/0x68
>> ->action():   (null)
>>    IRQ_NOPROBE set
>>  IRQ_NOREQUEST set
>> irq 0, desc: cf004000, depth: 1, count: 0, unhandled: 0
>> ->handle_irq():  c0087fc0, handle_bad_irq+0x0/0x258
>> ->irq_data.chip(): c08e7174, no_irq_chip+0x0/0x68
>> ->action():   (null)
>>    IRQ_NOPROBE set
>>  IRQ_NOREQUEST set
>> irq 0, desc: cf004000, depth: 1, count: 0, unhandled: 0
>> ->handle_irq():  c0087fc0, handle_bad_irq+0x0/0x258
>> ->irq_data.chip(): c08e7174, no_irq_chip+0x0/0x68
>> ->action():   (null)
>>    IRQ_NOPROBE set
>>  IRQ_NOREQUEST set
>> irq 0, desc: cf004000, depth: 1, count: 0, unhandled: 0
>> ->handle_irq():  c0087fc0, handle_bad_irq+0x0/0x258
>> ->irq_data.chip(): c08e7174, no_irq_chip+0x0/0x68
>> ->action():   (null)
>>
>> My system: am335x with fast ethernet on the first slave and gigabit
>> Ethernet on second CPSW slave. This issue occurs, when I ran nuttcp
>> with default settings.
>>
>> With commit above I can at least see these messages, but 3.18-rc7 for
>> example reboots without any messages.
>>
>> Any idea?
>
> if you take v3.18-rc7 and just revert that commit, does the problem go
> away ?

git revert failed as the driver has more changes meanwhile or I'm
missing some params. I've tried to force the driver to use legacy
routines, but then I don't get pass U-Boot's "Starting kernel ..." See
attached patch.

Compiler used:

Linux version 3.18.0-rc7 (...) (gcc version 4.8.3 20140320
(prerelease) (Sourcery CodeBench Lite 2014.05-29) ) #309 SMP Fri Dec 5
10:59:38 CET 2014

Btw, what am335x based hardware do you have? I can run tests on both
BBB and am335x-evmsk.

Yegor

Download attachment "0001-Irq-patch-revert.patch" of type "application/octet-stream" (2338 bytes)