Tejun Heo wrote:

ata_host_release() uses drvdata to determine ata_host to release and
clearing drvdata in ->remove_one causes NULL pointer deference.  Clear
drvdata only in ata_host_release() after all resources are freed.

This bug was first analyzed by Alan Cox for pata_pcmcia.

Signed-off-by: Tejun Heo <redacted>
Cc: Alan Cox <redacted>
---
Alan, this is the bug you talked about, right?  I took the fix from
"[BUG] PATA_PCMCIA does not work" and expanded it.  If this isn't the
one, please let me know.  Thanks.

Has a tester confirmed that this patch fixes the problem, and supercedes 
Alan's patch?

	Jeff