umbim: call umbim disconnect in error case

This is needed to properly close the control channel.

Otherwise, on the next try the caps call may fail.

Signed-off-by: Martin Schiller <ms@dev.tdt.de>

package/network/utils/umbim/files/lib/netifd/proto/mbim.sh

@@ -65,6 +65,8 @@ _proto_mbim_setup() {
 	echo "mbim[$$]" "Reading capabilities"
 	umbim $DBG -n -d $device caps || {
 		echo "mbim[$$]" "Failed to read modem caps"
+		tid=$((tid + 1))
+		umbim $DBG -t $tid -d "$device" disconnect
 		proto_notify_error "$interface" PIN_FAILED
 		return 1
 	}
@@ -74,6 +76,8 @@ _proto_mbim_setup() {
 		echo "mbim[$$]" "Sending pin"
 		umbim $DBG -n -t $tid -d $device unlock "$pincode" || {
 			echo "mbim[$$]" "Unable to verify PIN"
+			tid=$((tid + 1))
+			umbim $DBG -t $tid -d "$device" disconnect
 			proto_notify_error "$interface" PIN_FAILED
 			proto_block_restart "$interface"
 			return 1
@@ -84,6 +88,8 @@ _proto_mbim_setup() {
 	echo "mbim[$$]" "Checking pin"
 	umbim $DBG -n -t $tid -d $device pinstate || {
 		echo "mbim[$$]" "PIN required"
+		tid=$((tid + 1))
+		umbim $DBG -t $tid -d "$device" disconnect
 		proto_notify_error "$interface" PIN_FAILED
 		proto_block_restart "$interface"
 		return 1
@@ -93,6 +99,8 @@ _proto_mbim_setup() {
 	echo "mbim[$$]" "Checking subscriber"
 	umbim $DBG -n -t $tid -d $device subscriber || {
 		echo "mbim[$$]" "Subscriber init failed"
+		tid=$((tid + 1))
+		umbim $DBG -t $tid -d "$device" disconnect
 		proto_notify_error "$interface" NO_SUBSCRIBER
 		return 1
 	}
@@ -101,6 +109,8 @@ _proto_mbim_setup() {
 	echo "mbim[$$]" "Register with network"
 	umbim $DBG -n -t $tid -d $device registration || {
 		echo "mbim[$$]" "Subscriber registration failed"
+		tid=$((tid + 1))
+		umbim $DBG -t $tid -d "$device" disconnect
 		proto_notify_error "$interface" NO_REGISTRATION
 		return 1
 	}
@@ -109,6 +119,8 @@ _proto_mbim_setup() {
 	echo "mbim[$$]" "Attach to network"
 	umbim $DBG -n -t $tid -d $device attach || {
 		echo "mbim[$$]" "Failed to attach to network"
+		tid=$((tid + 1))
+		umbim $DBG -t $tid -d "$device" disconnect
 		proto_notify_error "$interface" ATTACH_FAILED
 		return 1
 	}
@@ -169,7 +181,7 @@ proto_mbim_teardown() {
 
 	echo "mbim[$$]" "Stopping network"
 	[ -n "$tid" ] && {
-		umbim $DBG -t$tid -d "$device" disconnect
+		umbim $DBG -t $tid -d "$device" disconnect
 		uci_revert_state network $interface tid
 	}