From c0d69d10f6f09bdecba70f5750c46b29795e8287 Mon Sep 17 00:00:00 2001
From: erictian <erictian@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Wed, 17 Mar 2010 09:48:05 +0000
Subject: [PATCH] =?UTF-8?q?The=20ATA=20alignment=5Flogic=5Fin=5Fphy=5Fbloc?=
 =?UTF-8?q?ks=20field=20doesn=E2=80=99t=20directly=20report=20the=20lowest?=
 =?UTF-8?q?=20aligned=20LBA.=20=20Instead,=20there=E2=80=99s=20some=20modu?=
 =?UTF-8?q?lo=20arithmetic=20involved.?=
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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10266 6f19259b-4bc3-4df7-8a09-765794883524
---
 IntelFrameworkModulePkg/Bus/Pci/IdeBusDxe/Ata.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/IntelFrameworkModulePkg/Bus/Pci/IdeBusDxe/Ata.c b/IntelFrameworkModulePkg/Bus/Pci/IdeBusDxe/Ata.c
index c22f7a3b30..7d92065b1c 100644
--- a/IntelFrameworkModulePkg/Bus/Pci/IdeBusDxe/Ata.c
+++ b/IntelFrameworkModulePkg/Bus/Pci/IdeBusDxe/Ata.c
@@ -2563,7 +2563,8 @@ AtaEnableLongPhysicalSector (
       //
       if ((AtaIdentifyData->alignment_logic_in_phy_blocks & 0xc000) == 0x4000) {
         IdeDev->BlkIo.Media->LowestAlignedLba =
-          (EFI_LBA) (AtaIdentifyData->alignment_logic_in_phy_blocks & 0x3fff);
+          (EFI_LBA) (IdeDev->BlkIo.Media->LogicalBlocksPerPhysicalBlock - (AtaIdentifyData->alignment_logic_in_phy_blocks & 0x3fff)) %
+          IdeDev->BlkIo.Media->LogicalBlocksPerPhysicalBlock;
       }
     }
     //