Zebediah Figura : setupapi: Reset the source file pointer when comparing files.

[Alexandre Julliard]

Module: wine
Branch: stable
Commit: 7678c5878aa92a91422ace79f57ca7c3032af834
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=7678c5878aa92a91422ace79f...

Author: Zebediah Figura 
Date:   Thu Jun 11 11:16:30 2020 -0500

setupapi: Reset the source file pointer when comparing files.

Signed-off-by: Zebediah Figura 
Signed-off-by: Alexandre Julliard 
(cherry picked from commit 007a9c9726e455fc99d7362e3bafaa89bec11ab4)
Signed-off-by: Michael Stefaniuc

---

dlls/setupapi/misc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dlls/setupapi/misc.c b/dlls/setupapi/misc.c
index 3b5d62b682c..3b0c9477747 100644
--- a/dlls/setupapi/misc.c
+++ b/dlls/setupapi/misc.c
@@ -933,6 +933,8 @@ static BOOL find_existing_inf(const WCHAR *source, WCHAR *target)
             if (dest_file == INVALID_HANDLE_VALUE)
                 continue;

+            SetFilePointer( source_file, 0, NULL, FILE_BEGIN );
+
             if (GetFileSizeEx( dest_file, &dest_file_size )
                     && dest_file_size.QuadPart == source_file_size.QuadPart
                     && !compare_files( source_file, dest_file ))