From 169d9addc90eb6e3201c866a75acda2ba97cf69a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
Date: Fri, 20 Mar 2026 12:04:18 +0530
Subject: [PATCH] focaltech_moc: Do not set delete feature for 6553

---
 .../drivers/focaltech_moc/focaltech_moc.c     | 20 ++++++++------
 tests/focaltech_moc-6553/custom.py            | 27 ++++++-------------
 2 files changed, 20 insertions(+), 27 deletions(-)

diff --git a/libfprint/drivers/focaltech_moc/focaltech_moc.c b/libfprint/drivers/focaltech_moc/focaltech_moc.c
index e0801eb2..933e217d 100644
--- a/libfprint/drivers/focaltech_moc/focaltech_moc.c
+++ b/libfprint/drivers/focaltech_moc/focaltech_moc.c
@@ -1801,16 +1801,8 @@ static void
 focaltech_moc_delete_print (FpDevice *device)
 {
   FpiDeviceFocaltechMoc *self = FPI_DEVICE_FOCALTECH_MOC (device);
-  guint64 quirk = fpi_device_get_driver_data (device);
   FpActionData *data = NULL;
 
-  if (quirk == FOCALTECH_QUIRK_SINGLE_SLOT)
-    {
-      fpi_device_delete_complete (FP_DEVICE (self),
-                                  fpi_device_error_new (FP_DEVICE_ERROR_NOT_SUPPORTED));
-      return;
-    }
-
   data = g_new0 (FpActionData, 1);
   data->enrolled_info = g_new0 (struct EnrolledInfo, 1);
   data->list_result = g_ptr_array_new_with_free_func (g_object_unref);
@@ -1966,6 +1958,17 @@ fpi_device_focaltech_moc_init (FpiDeviceFocaltechMoc *self)
   G_DEBUG_HERE ();
 }
 
+static void
+focaltech_moc_probe (FpDevice *device)
+{
+  guint64 quirk = fpi_device_get_driver_data (device);
+
+  if (quirk == FOCALTECH_QUIRK_SINGLE_SLOT)
+    fpi_device_update_features (device, FP_DEVICE_FEATURE_STORAGE_DELETE, 0);
+
+  fpi_device_probe_complete (device, NULL, NULL, NULL);
+}
+
 static void
 fpi_device_focaltech_moc_class_init (FpiDeviceFocaltechMocClass *klass)
 {
@@ -1980,6 +1983,7 @@ fpi_device_focaltech_moc_class_init (FpiDeviceFocaltechMocClass *klass)
   dev_class->nr_enroll_stages = FOCALTECH_MOC_MAX_FINGERS;
   dev_class->temp_hot_seconds = -1;
 
+  dev_class->probe = focaltech_moc_probe;
   dev_class->open = focaltech_moc_open;
   dev_class->close = focaltech_moc_close;
   dev_class->verify = focaltech_moc_identify;
diff --git a/tests/focaltech_moc-6553/custom.py b/tests/focaltech_moc-6553/custom.py
index 2b94798c..d427ae1f 100644
--- a/tests/focaltech_moc-6553/custom.py
+++ b/tests/focaltech_moc-6553/custom.py
@@ -26,8 +26,7 @@ del devices
 d.open_sync()
 assert d.get_driver() == "focaltech_moc"
 assert d.has_feature(FPrint.DeviceFeature.STORAGE_LIST)
-assert d.has_feature(FPrint.DeviceFeature.STORAGE_DELETE)
-#added storage clear
+assert not d.has_feature(FPrint.DeviceFeature.STORAGE_DELETE)
 assert d.has_feature(FPrint.DeviceFeature.STORAGE_CLEAR)
 
 
@@ -54,27 +53,17 @@ verify_res, verify_print = d.verify_sync(p)
 assert verify_res == True
 print("Verify done.")
 
+print("Delete is a no-op here")
+d.delete_print_sync(p)
+
 print('Identifying...')
 match, identify_print = d.identify_sync(stored, None, None, None)
 
-if match:
-    print('Identification SUCCESS')
-    assert match.equal(identify_print)
-else:
-    print('Identification FAILURE')
-    sys.exit(1)
+print('Identification SUCCESS')
+assert match.equal(identify_print)
+assert match.equal(p)
 
-print("Deleting...")
-try:
-    d.delete_print_sync(stored[0])
-except GLib.Error as error:
-    assert error.matches(FPrint.DeviceError.quark(),
-                         FPrint.DeviceError.NOT_SUPPORTED)
-else:
-    raise AssertionError("delete_print_sync unexpectedly succeeded")
-print("Delete not supported verified.")
-
-print("Clearing storage (0xAC)...")
+print("Clearing storage...")
 d.clear_storage_sync()
 
 final_list = d.list_prints_sync()