I've attached an alternative patch:
ide assumes that blk_init_queue doesn't sleep or enable interrupts. As a
quick fix, make block_grow_request_list() nonblocking:
both spin_lock_irqsave() and SLAB_ATOMIC allocations. Just
spin_lock_irqsave() with SLAB_KERNEL allocations doesn't fix the
problem.

The better fix would be cleaning up init_irq() in
drivers/ide/ide-probe.c, but that's something for 2.5 or someone who
understand the ide code.

--
	Manfred