From 84b8be31d0c9c613d3c98e8db58dd5861ae58cac Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@rei2.9hal>
Date: Sun, 12 Feb 2012 04:02:33 +0100
Subject: [PATCH] sdide: fix lba48 transition bug

---
 sys/src/9/pc/sdide.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/src/9/pc/sdide.c b/sys/src/9/pc/sdide.c
index d70b06a1f..58a86b8af 100644
--- a/sys/src/9/pc/sdide.c
+++ b/sys/src/9/pc/sdide.c
@@ -1275,7 +1275,7 @@ static uchar cmd48[256] = {
 };
 
 enum{
-	Last28	= (1<<28) - 1 - 1,
+	Last28	= (1<<28) - 1,
 };
 
 static int
@@ -1286,7 +1286,7 @@ atageniostart(Drive* drive, uvlong lba)
 	int as, c, cmdport, ctlport, h, len, s, use48;
 
 	use48 = 0;
-	if((drive->flags&Lba48always) || lba > Last28 || drive->count > 256){
+	if((drive->flags&Lba48always) || (lba+drive->count) > Last28 || drive->count > 256){
 		if((drive->feat & Dllba) == 0)
 			return -1;
 		use48 = 1;