Re: 2.4.27: md RAID1 oops on alpha revisited

[Ivan Kokshaysky]

On Tue, Sep 28, 2004 at 01:44:24AM +0200, Ingvar Hagelund wrote:
> We have a Compaq Alphaserver DS10 466 MHz running Debian Woody with a
> self compiled 2.4.27 from kernel.org. We have not been able to make it
> run stable on md RAID1. It always crashes in less than an hour
> uptime, presumely while stressing the RAID code. Running on single
> disks, it's rock stable.

The problem seems to be in qlogic isp1020 driver, not in the RAID code.
I've seen exactly the same oops report, but that had happened while
writing to SCSI tape.

> Code;  fffffc000050da00 <isp1020_intr_handler+300/420>
>   14:   49 00 40 d3       bsr  ra,13c <_PC+0x13c> fffffc000050db28 <isp1020_return_status+8/100>
> Code;  fffffc000050da04 <isp1020_intr_handler+304/420>   <=====
>   18:   40 02 09 b0       stl  v0,576(s0)   <=====

It's the line 1052 in drivers/scsi/qlogicisp.c:

		if (sts->hdr.entry_type == ENTRY_STATUS)
			Cmnd->result = isp1020_return_status(sts);

The "Cmnd" pointer happened to be a NULL somehow...

Ivan.
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