sanei_scsi.c: Fixed a buf in the rror handling for the Linux SG driver v3.x;

disabled direct IO by default

configure.in

@@ -243,6 +243,16 @@ AC_DEFINE_UNQUOTED(SCSIBUFFERSIZE, $set_scsibuffersize,
                    [SCSI command buffer size])
 echo "scsi buffersize: $set_scsibuffersize"
 
+AC_ARG_ENABLE(directio,
+  [  --enable-directio       enable direct IO (Linux only; can lead to
+crashes
+                          with backends using shared memory) [default=no]],
+  [
+    if eval "test x$enable_directio = xyes"; then
+      CFLAGS="$CFLAGS -DENABLE_DIRECTIO"
+    fi
+  ])
+
 AC_SUBST(V_MAJOR)
 AC_SUBST(V_MINOR)
 AC_SUBST(V_REV)