On Wed, Jul 31, 2013 at 07:55:27AM -0400, Tejun Heo wrote:

If you have DMA / IRQ / command engine deactivations in devm path
which often is the case with full conversions, freeing any resources
including DMA areas and host private data in the wrong order is a
horrible idea.  It's worse as it won't really be noticeable in most
cases.

It's really only interrupts that affect most devices - if there's DMA or
anything going on after the remove() then as you said earlier the driver
is probably doing something wrong.
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