[PATCH v2 1/1] mountmgr.sys: Dont attempt to read from invalid media

[Alistair Leslie-Hughes]

From: Alistair Leslie-Hughes

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=49615
---
 dlls/mountmgr.sys/device.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/dlls/mountmgr.sys/device.c b/dlls/mountmgr.sys/device.c
index 22c17025e87..d54dbbea3d6 100644
--- a/dlls/mountmgr.sys/device.c
+++ b/dlls/mountmgr.sys/device.c
@@ -899,8 +899,18 @@ static BOOL get_volume_device_info( struct volume *volume )
     }
     else
     {
-        volume->fs_type = VOLUME_ReadFATSuperblock( handle, superblock );
-        if (volume->fs_type == FS_UNKNOWN) volume->fs_type = VOLUME_ReadCDSuperblock( handle, superblock );
+        if(GetLastError() == ERROR_NOT_READY)
+        {
+            TRACE( "%s: removable drive with no inserted media\n", debugstr_a(unix_device) );
+            volume->fs_type = FS_UNKNOWN;
+            CloseHandle( handle );
+            return TRUE;
+        }
+        else
+        {
+            volume->fs_type = VOLUME_ReadFATSuperblock( handle, superblock );
+            if (volume->fs_type == FS_UNKNOWN) volume->fs_type = VOLUME_ReadCDSuperblock( handle, superblock );
+        }
     }

TRACE( "%s: found fs type %d\n", debugstr_a(unix_device), volume->fs_type );