Bootup oops in scsi_run_queue with megaraid-newgen

[Daniel Drake <dsd@gentoo.org>]

Hi,

A Gentoo user has reported he is unable to boot using the megaraid-newgen 
driver, whereas the legacy driver works fine.

This is on kernel 2.6.14.2 on x86-64.

The problem is fixed in 2.6.15-rc2 but I'm curious as to whether anybody knows 
which patch solved this, so that it can be submitted to linux-stable and added 
to Gentoo's kernel releases.

Here is the oops (transcribed from a low quality photo, might include some typos)

scsi0: LSI Logic MegaRAID driver
scsi[0]: scanning scsi channel 0 [Phy 0] for non-raid devices
scsi[0]: scanning scsi channel 1 [Phy 1] for non-raid devices
Unable to handle kernel null pointer dereference at .. RIP : scsi_run_queue+25
Oops: 0000 [1] SMP
CPU 1
Pid: 0, comm: swapper Not tainted
Call Trace:
	<IRQ> scsi_end_request
	scsi_io_completion
	scsi_softirq
	__do_softirq
	call_softirq
	do_softirq
	do_IRQ
	ret_from_intr
	<EOI> flat_scmd_IFI_mask
	default_idle
	cpu_idle
	start_secondary

Any ideas? The original bug is at http://bugs.gentoo.org/show_bug.cgi?id=113463


Thanks,
Daniel