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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-06-07 07:52:52 -0400
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-06-07 07:52:52 -0400
commit075affcbe01d4d7cefcd0e30a98df1253bcf8d92 (patch)
treeceadcf00f56c5a7a394e689e61734811efe33b82 /include/linux/ide.h
parente957b60d1583022a0f7c03267d37fcae2ddb78b1 (diff)
ide: preserve Host Protected Area by default (v2)
From the perspective of most users of recent systems, disabling Host Protected Area (HPA) can break vendor RAID formats, GPT partitions and risks corrupting firmware or overwriting vendor system recovery tools. Unfortunately the original (kernels < 2.6.30) behavior (unconditionally disabling HPA and using full disk capacity) was introduced at the time when the main use of HPA was to make the drive look small enough for the BIOS to allow the system to boot with large capacity drives. Thus to allow the maximum compatibility with the existing setups (using HPA and partitioned with HPA disabled) we automically disable HPA if any partitions overlapping HPA are detected. Additionally HPA can also be disabled using the "nohpa" module parameter (i.e. "ide_core.nohpa=0.0" to disable HPA on /dev/hda). v2: Fix ->resume HPA support. While at it: - remove stale "idebus=" entry from Documentation/kernel-parameters.txt Cc: Robert Hancock <hancockrwd@gmail.com> Cc: Frans Pop <elendil@planet.nl> Cc: "Andries E. Brouwer" <Andries.Brouwer@cwi.nl> Cc: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> [patch description was based on input from Alan Cox and Frans Pop] Emphatically-Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'include/linux/ide.h')
-rw-r--r--include/linux/ide.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ide.h b/include/linux/ide.h
index e96ace12872a..45dce3b4c88c 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -475,6 +475,8 @@ enum {
475 IDE_DFLAG_NICE1 = (1 << 5), 475 IDE_DFLAG_NICE1 = (1 << 5),
476 /* device is physically present */ 476 /* device is physically present */
477 IDE_DFLAG_PRESENT = (1 << 6), 477 IDE_DFLAG_PRESENT = (1 << 6),
478 /* disable Host Protected Area */
479 IDE_DFLAG_NOHPA = (1 << 7),
478 /* id read from device (synthetic if not set) */ 480 /* id read from device (synthetic if not set) */
479 IDE_DFLAG_ID_READ = (1 << 8), 481 IDE_DFLAG_ID_READ = (1 << 8),
480 IDE_DFLAG_NOPROBE = (1 << 9), 482 IDE_DFLAG_NOPROBE = (1 << 9),