netdev - gianfar tries to free an irq from interrupt context

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Message-ID: <6a6049b80812180938q927a8e6v9b2ca659c42442c@mail.gmail.com>
Date:	Thu, 18 Dec 2008 18:38:26 +0100
From:	"M B" <super.firetwister@...glemail.com>
To:	netdev <netdev@...r.kernel.org>
Cc:	galak@...nel.crashing.org, linuxppc-dev@...abs.org
Subject: gianfar tries to free an irq from interrupt context

Hi,

I'm having Problems with the gianfar Ethernet. eth1 is working fine,
but eth0 is making trouble. It's making trouble in u-boot as well, so
it could as well be a hardware problem.
First of all eth0 receives some frame errors (frame: in ifconfig), but
eth1 doesn't.
eth1 performs well under a ping flood, but eth0 produces the following
WARN_ON() after some time.
I'm using linux-2.6.26 ARCH ppc on a MPC8347 with 2 different 100MB PHYs.

Is my Board just triggering this error or responsible for it?

Regards

Markus

------------[ cut here ]------------
Badness at kernel/irq/manage.c:441
NIP: c003e9c0 LR: c014e5b4 CTR: c014e7f0
REGS: c029bcd0 TRAP: 0700   Tainted: G        W  (2.6.26)
MSR: 00021032 <ME,IR,DR>  CR: 44000028  XER: 00000000
TASK = c027f7f8[0] 'swapper' THREAD: c029a000
GPR00: 00000001 c029bd80 c027f7f8 00000022 cfca1080 ffffffff c013e298 c02f2cd8
GPR08: cfca13e0 c029a000 02000100 fe024000 38c35770 ffffffff 0404f000 00000000
GPR16: ffffffbf ffffffff c02f002c c0282344 00200200 00000000 c0303be8 c0303de8
GPR24: c0303fe8 c03041e8 c029a034 c029bde8 cfca1080 00009032 00000022 cfca13e0
NIP [c003e9c0] free_irq+0x2c/0x18c
LR [c014e5b4] stop_gfar+0x70/0x11c
Call Trace:
[c029bd80] [00000102] 0x102 (unreliable)
[c029bda0] [c014e5b4] stop_gfar+0x70/0x11c
[c029bdc0] [c014e820] gfar_timeout+0x30/0x60
[c029bdd0] [c01a4770] dev_watchdog+0xac/0x160
[c029bde0] [c0021a18] run_timer_softirq+0x17c/0x220
[c029be30] [c001cd84] __do_softirq+0x70/0xd0
[c029be60] [c0008ff8] do_softirq+0x40/0x58
[c029be70] [c001ca08] irq_exit+0x3c/0x5c
[c029be80] [c0005790] timer_interrupt+0x204/0x234
[c029bec0] [c00042b4] ret_from_except+0x0/0x14
[c029bf80] [c000bdcc] cpu_idle+0xdc/0xec
[c029bfa0] [c02057b4] rest_init+0x7c/0x90
[c029bfc0] [c029d914] start_kernel+0x2b8/0x2cc
[c029bff0] [000032c0] 0x32c0
Instruction dump:
4e800020 7c0802a6 9421ffe0 bf810010 54290024 90010024 7c7e1b78 7c9c2378
8009000c 5400012e 7c0000d0 54000ffe <0f000000> 2b83007f 419d0144 1c030038
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