smartcard: use SpiceCharDeviceState for managing reading from the device

This patch and the following one do not introduce tokening to the smartcard
channel. But this can be done easily later, by setting the appropriate
variables in SpiceCharDeviceState (after adding the appropriate protocol messages,
and implementing this in the client side).

1 files changed, 3 insertions, 1 deletions

diff --git a/server/reds.c b/server/reds.c
index 42fad0ce..911564b8 100644
--- a/server/reds.c
+++ b/server/reds.c
@@ -3200,7 +3200,7 @@ static int spice_server_char_device_add_interface(SpiceServer *s,
     }
 #ifdef USE_SMARTCARD
     else if (strcmp(char_device->subtype, SUBTYPE_SMARTCARD) == 0) {
-        if (smartcard_device_connect(char_device) == -1) {
+        if (!(dev_state = smartcard_device_connect(char_device))) {
             return -1;
         }
     }
@@ -3213,6 +3213,8 @@ static int spice_server_char_device_add_interface(SpiceServer *s,
         /* setting the char_device state to "started" for backward compatibily with
          * qemu releases that don't call spice api for start/stop (not implemented yet) */
         spice_char_device_start(char_device->st);
+    } else {
+        spice_error("failed to create device state for %s", char_device->subtype);
     }
     return 0;
 }