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libata: zero xfer length on ATAPI data xfer IRQ is HSM violation
authorAlbert Lee <albertcc@tw.ibm.com>
Wed, 5 Dec 2007 07:43:02 +0000 (16:43 +0900)
committerJeff Garzik <jeff@garzik.org>
Wed, 23 Jan 2008 10:24:13 +0000 (05:24 -0500)
Treat zero xfer length as HSM violation.  While at it, add
unlikely()'s to ATAPI ireason and transfer length checks.

tj: Formatted patch and added unlikely()'s.

Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

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