From 89de3e29e199078683134ef00aceb682adc83087 Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Wed, 18 Nov 2009 00:50:45 +0000
Subject: [int13] Fix number of sectors returned by INT 13,15

INT 13,15 should return the number of sectors, not the number of
cylinders.
---
 src/arch/i386/interface/pcbios/int13.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/arch/i386/interface/pcbios/int13.c b/src/arch/i386/interface/pcbios/int13.c
index 733060f2..07439b93 100644
--- a/src/arch/i386/interface/pcbios/int13.c
+++ b/src/arch/i386/interface/pcbios/int13.c
@@ -207,9 +207,13 @@ static int int13_get_parameters ( struct int13_drive *drive,
  */
 static int int13_get_disk_type ( struct int13_drive *drive,
 				 struct i386_all_regs *ix86 ) {
+	uint32_t blocks;
+
 	DBG ( "Get disk type\n" );
-	ix86->regs.cx = ( drive->cylinders >> 16 );
-	ix86->regs.dx = ( drive->cylinders & 0xffff );
+	blocks = ( ( drive->blockdev->blocks <= 0xffffffffUL ) ?
+		   drive->blockdev->blocks : 0xffffffffUL );
+	ix86->regs.cx = ( blocks >> 16 );
+	ix86->regs.dx = ( blocks & 0xffff );
 	return INT13_DISK_TYPE_HDD;
 }
 
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