New upstream version 1.1.1upstream/1.1.1

1 files changed, 5 insertions, 2 deletions

diff --git a/backend/pieusb.c b/backend/pieusb.c
index a070fc0..f8dc073 100644
--- a/backend/pieusb.c
+++ b/backend/pieusb.c
@@ -110,6 +110,8 @@ extern void write_tiff_rgbi_header (FILE *fptr, int width, int height, int depth
 /* device flags */
 
 #define FLAG_SLIDE_TRANSPORT 0x01
+/* Some scanners do understand SLIDE_TRANSPORT but not CMD_17 - introducing a new flag */
+#define FLAG_CMD_17_NOSUPPORT 0x02
 
 /* --------------------------------------------------------------------------
  *
@@ -163,7 +165,6 @@ sane_init (SANE_Int * version_code, SANE_Auth_Callback __sane_unused__ authorize
     DBG (DBG_info_sane, "sane_init() build %d\n", BUILD);
 
     /* Set version code to current major, minor and build number */
-    /* TODO: use V_MINOR instead or SANE_CURRENT_MINOR? If so, why?  */
     if (version_code)
         *version_code = SANE_VERSION_CODE (SANE_CURRENT_MAJOR, SANE_CURRENT_MINOR, BUILD);
 
@@ -1004,10 +1005,12 @@ sane_start (SANE_Handle handle)
     /* ----------------------------------------------------------------------
      *
      * Function 17
+     * This function is not supported by all scanners which are capable of
+     *  slide transport, therefore FLAG_CMD_17_NOSUPPORT was introduced.
      *
      * ---------------------------------------------------------------------- */
 
-    if (scanner->device->flags & FLAG_SLIDE_TRANSPORT) {
+    if ( (scanner->device->flags & FLAG_SLIDE_TRANSPORT) & !(scanner->device->flags & FLAG_CMD_17_NOSUPPORT) )     {
         sanei_pieusb_cmd_17 (scanner->device_number, 1, &status);
         if (status.pieusb_status != PIEUSB_STATUS_GOOD) {
           DBG (DBG_error, "sane_start(): sanei_pieusb_cmd_17 failed: %d\n", status.pieusb_status);