From 134e555c429198b3f9104024020ae455fe397cbf Mon Sep 17 00:00:00 2001
From: Bo Chen <chen.bo@intel.com>
Date: Fri, 16 Sep 2022 13:38:08 -0700
Subject: [PATCH] vhdx: Fix wrong alignment calculation

With the existing macro, `align!(7, 4)` would generate `16` which is
obviously wrong. Also, given it is a macro, the compiler catch the error
if the provided 'alignment' is '0'.

Signed-off-by: Bo Chen <chen.bo@intel.com>
---
 vhdx/src/vhdx_io.rs | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/vhdx/src/vhdx_io.rs b/vhdx/src/vhdx_io.rs
index ea250c0b2..9fbb9504e 100644
--- a/vhdx/src/vhdx_io.rs
+++ b/vhdx/src/vhdx_io.rs
@@ -34,12 +34,7 @@ pub type Result<T> = std::result::Result<T, VhdxIoError>;
 
 macro_rules! align {
     ($n:expr, $align:expr) => {{
-        if $align > $n {
-            $align
-        } else {
-            let rem = $n % $align;
-            (($n / $align) + rem) * $align
-        }
+        (($n + $align - 1) / $align) * $align
     }};
 }