From: Ayman El-Khashab <ayman@elkhashab•com>
To: linuxppc-dev@lists•ozlabs.org
Subject: help with unhandled IRQ error with mpt2sas driver and powerpc 460EX
Date: Tue, 27 Oct 2009 12:27:31 -0500 [thread overview]
Message-ID: <4AE72D83.7000404@elkhashab.com> (raw)
Hello, I am using the mpt2sas driver on the canyonlands / 460EX board.
I've already found and fixed one problem, but can't get past the
unhandled IRQ.
The first problem I noticed is that the physical address is read into a
32 bit variable, but the 460ex has a 36 bit bus so the ioremap would
always fail. I've change the defn of chip_phys in mpt2sas_base.h to u64
and that cleared up that issue. As soon as the unmask_interrupts
method is called (or not long after), I get an interrupt -- presumably
from the sas controller. If I comment out the unmask, the interrupt
never occurs. If I unmask them, I get the interrupt. I've traced the
code through the interrupt handler all the way to ~ line 757.
rpf = &ioc->reply_post_free[ioc->reply_post_host_index];
I've verified that at the end of this, IRQ_NONE is returned. At this
point the kernel prints the following -- the last statements lead me to
think that the sas controller expected something but never got it. I am
unsure how to proceed at this point. I am using a denx kernel head
pulled from git today since there were some changes to thsi driver for
endian issues.
irq 18: nobody cared (try booting with the "irqpoll" option)
Call Trace:
[c0367df0] [c0005eac] show_stack+0x44/0x16c (unreliable)
[c0367e30] [c004eedc] __report_bad_irq+0x34/0xb8
[c0367e50] [c004f118] note_interrupt+0x1b8/0x224
[c0367e80] [c004ff50] handle_level_irq+0xa0/0x11c
[c0367e90] [c0018ba4] uic_irq_cascade+0xf8/0x12c
[c0367eb0] [c00041d0] do_IRQ+0x98/0xb4
[c0367ed0] [c000df40] ret_from_except+0x0/0x18
[c0367f90] [c0006ed8] cpu_idle+0x50/0xd8
[c0367fb0] [c000197c] rest_init+0x5c/0x70
[c0367fc0] [c0320848] start_kernel+0x224/0x2a0
[c0367ff0] [c0000200] skpinv+0x190/0x1cc
handlers:
[<c01aba98>] (_base_interrupt+0x0/0x8f8)
Disabling IRQ #18
mpt2sas0: _base_event_notification: timeout
mf:
07000000 00000000 00000000 00000000 00000000 0f2f3fff fffffffc
ffffffff
ffffffff 00000000 00000000
mpt2sas0: sending diag reset !!
mpt2sas0: diag reset: SUCCESS
mpt2sas0: failure at
drivers/scsi/mpt2sas/mpt2sas_scsih.c:5989/_scsih_probe()!
Thanks
Ayman
next reply other threads:[~2009-10-27 17:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-27 17:27 Ayman El-Khashab [this message]
2009-10-28 0:22 ` help with unhandled IRQ error with mpt2sas driver and powerpc 460EX Benjamin Herrenschmidt
2009-11-07 2:47 ` Ayman El-Khashab
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