From: Stuart Hayes <Stuart_Hayes@dell.com>
Date: Thu, 26 May 2005 13:38:45 +0000 (+0200)
Subject: [PATCH] ide-scsi: kmap scatter/gather before doing PIO
X-Git-Tag: v2.6.12-rc6~148
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=41bb4c43b34bcde7eb62cf19acdcf9f2eb13801d;p=pandora-kernel.git

[PATCH] ide-scsi: kmap scatter/gather before doing PIO

From: Stuart Hayes <Stuart_Hayes@dell.com>

The system can panic with a null pointer dereference using ide-scsi if
PIO is being done on scatter gather pages that are in high memory,
because page_address() returns 0.  We are actually seeing this using a
tape drive.  This patch will kmap_atomic() the pages before performing
PIO.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
---

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