From: Jeff Garzik <jgarzik@pobox.com>
Date: Mon, 14 Nov 2005 19:06:26 +0000 (-0500)
Subject: [libata] fix bugs in ATAPI padding DMA mapping code
X-Git-Tag: v2.6.15-rc2~79^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e1410f2d951d45aee3bdbcc05ecedaaa9db276e5;p=pandora-kernel.git

[libata] fix bugs in ATAPI padding DMA mapping code

The ATAPI pad-to-next-32bit-boundary code modifies the scatterlist's
length variable, sometimes to zero.  x86-64 platform would oops if a
zero-length scatterlist entry was asked to be mapped.  Work around this
by ensuring that we never DMA-map a zero length buffer or SG entry.
---

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