[PATCH v4] plugins/wifi: Fix GSupplicantInterface socket leak during teardown

During interface teardown, the GSupplicantInterface resources were not being
properly canceled, leading to a socket file descriptor leak. This patch
ensures that g_supplicant_interface_cancel is executed safely when the
interface is removed.
---
Changes in v4:
  - Restored the missing patch commit description text.
  - Fixed the stray empty line deletion formatting error.

Changes in v3:
  - Fixed a text truncation error that broke the v2 patch file structure.
  - Switched entirely to using git send-email to prevent browser text corruption.
  - Sorry about the email formatting noise; it has been a long time since I used an email mailing list!

Changes in v2:
  - Corrected resource cancellation paths inside GSupplicantInterface.

 plugins/wifi.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/plugins/wifi.c b/plugins/wifi.c
index 9ce7b5a3..ce09b556 100644
--- a/plugins/wifi.c
+++ b/plugins/wifi.c
@@ -2740,19 +2740,17 @@ static void interface_removed(GSupplicantInterface *interface)
 	DBG("ifname %s", ifname);
 
 	wifi = g_supplicant_interface_get_data(interface);
-
 	if (wifi)
 		wifi->interface = NULL;
 
 	if (wifi && wifi->tethering)
 		return;
 
-	if (!wifi || !wifi->device) {
-		DBG("wifi interface already removed");
-		return;
-	}
+	if (wifi != NULL && wifi->device != NULL)
+		connman_device_set_powered(wifi->device, FALSE);
 
-	connman_device_set_powered(wifi->device, false);
+	g_supplicant_interface_set_data(interface, NULL);
+	g_supplicant_interface_cancel(interface);
 
 	check_p2p_technology();
 }
-- 
2.47.3