X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=pv%2Fsession.cpp;h=dd78f4a176088ebb69cc5089558b4d310a7d4415;hb=ffe001198ecb5ea2e44c2947868c258afe948f20;hp=2cdc25f83ed0ee3c718896da9d8df98d13f34876;hpb=30d6f09f5eec0fb18d5c87347b5de6124a56a63c;p=pulseview.git

diff --git a/pv/session.cpp b/pv/session.cpp
index 2cdc25f..dd78f4a 100644
--- a/pv/session.cpp
+++ b/pv/session.cpp
@@ -133,7 +133,7 @@ void Session::set_device(shared_ptr<devices::Device> device)
 		(shared_ptr<sigrok::Device> device, shared_ptr<Packet> packet) {
 			data_feed_in(device, packet);
 		});
-	update_signals(device_);
+	update_signals();
 
 	decode_traces_.clear();
 
@@ -301,13 +301,20 @@ void Session::set_capture_state(capture_state state)
 		capture_state_changed(state);
 }
 
-void Session::update_signals(shared_ptr<devices::Device> device)
+void Session::update_signals()
 {
-	assert(device);
+	assert(device_);
 	assert(capture_state_ == Stopped);
 
+	const shared_ptr<sigrok::Device> sr_dev = device_->device();
+	if (!sr_dev) {
+		signals_.clear();
+		logic_data_.reset();
+		return;
+	}
+
 	// Detect what data types we will receive
-	auto channels = device->device()->channels();
+	auto channels = sr_dev->channels();
 	unsigned int logic_channel_count = std::count_if(
 		channels.begin(), channels.end(),
 		[] (shared_ptr<Channel> channel) {
@@ -334,7 +341,7 @@ void Session::update_signals(shared_ptr<devices::Device> device)
 		unordered_set< shared_ptr<view::Signal> > prev_sigs(signals_);
 		signals_.clear();
 
-		for (auto channel : device->device()->channels()) {
+		for (auto channel : sr_dev->channels()) {
 			shared_ptr<view::Signal> signal;
 
 			// Find the channel in the old signals
@@ -357,7 +364,7 @@ void Session::update_signals(shared_ptr<devices::Device> device)
 				case SR_CHANNEL_LOGIC:
 					signal = shared_ptr<view::Signal>(
 						new view::LogicSignal(*this,
-							device,	channel,
+							device_, channel,
 							logic_data_));
 					break;