scd: Only submit apdu_get_status when needed.

* scd/apdu.c (apdu_dev_list_finish): Return Boolean value if
all device support INTERRUPT transfer.
* scd/ccid-driver.c (ccid_dev_scan_finish): Likewise.
* scd/app.c (app_new_register): Fix initial value of card_status.
(select_application): Call update_fdset_for_usb.
(scd_update_reader_status_file): Ditto.
* scd/scdaemon.c (update_fdset_for_usb, need_tick): New.
(handle_connections): Call handle_tick when select returns.
Let select watch USB file descriptors, too.
Call libusb_handle_events_timeout_completed for INTERRUPT transfer.

Signed-off-by: NIIBE Yutaka <[email protected]>

1 files changed, 5 insertions, 1 deletions

diff --git a/scd/app.c b/scd/app.c
index b10a452d6..daff0b7d7 100644
--- a/scd/app.c
+++ b/scd/app.c
@@ -192,6 +192,7 @@ app_new_register (int slot, ctrl_t ctrl, const char *name)
     }
 
   app->slot = slot;
+  app->card_status = (unsigned int)-1;
 
   if (npth_mutex_init (&app->lock, NULL))
     {
@@ -329,6 +330,7 @@ select_application (ctrl_t ctrl, const char *name, app_t *r_app,
   if (scan || !app_top)
     {
       struct dev_list *l;
+      int all_have_intr_endp;
 
       err = apdu_dev_list_start (opt.reader_port, &l);
       if (err)
@@ -368,7 +370,8 @@ select_application (ctrl_t ctrl, const char *name, app_t *r_app,
             }
         }
 
-      apdu_dev_list_finish (l);
+      all_have_intr_endp = apdu_dev_list_finish (l);
+      update_fdset_for_usb (1, all_have_intr_endp);
     }
 
   npth_mutex_lock (&app_list_lock);
@@ -1050,6 +1053,7 @@ scd_update_reader_status_file (void)
                   log_debug ("Removal of a card: %d\n", a->slot);
                   apdu_close_reader (a->slot);
                   deallocate_app (a);
+                  update_fdset_for_usb (0, 0);
                 }
               else
                 a->card_status = status;