From 8d054b91e39afd8e3b04cdde8e37f2c94aa2e608 Mon Sep 17 00:00:00 2001
From: Soeren Apel <soeren@apelpie.net>
Date: Mon, 9 Apr 2018 18:50:28 +0200
Subject: [PATCH 1/1] Fix #1153 by only showing drivers we'll actually scan

---
 pv/devicemanager.cpp | 29 +++++++++++++++++++----------
 pv/devicemanager.hpp |  2 ++
 2 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/pv/devicemanager.cpp b/pv/devicemanager.cpp
index 5920486a..ca8f66be 100644
--- a/pv/devicemanager.cpp
+++ b/pv/devicemanager.cpp
@@ -87,6 +87,11 @@ DeviceManager::DeviceManager(shared_ptr<Context> context,
 	for (auto entry : context->drivers()) {
 		if (!do_scan)
 			break;
+
+		// Skip drivers we won't scan anyway
+		if (!driver_supported(entry.second))
+			continue;
+
 		progress->setLabelText(QObject::tr("Scanning for %1...")
 			.arg(QString::fromStdString(entry.first)));
 
@@ -218,14 +223,8 @@ DeviceManager::drive_scan_options(vector<string> user_spec,
 	return result;
 }
 
-list< shared_ptr<devices::HardwareDevice> >
-DeviceManager::driver_scan(
-	shared_ptr<Driver> driver, map<const ConfigKey *, VariantBase> drvopts)
+bool DeviceManager::driver_supported(shared_ptr<Driver> driver) const
 {
-	list< shared_ptr<devices::HardwareDevice> > driver_devices;
-
-	assert(driver);
-
 	/*
 	 * We currently only support devices that can deliver samples at
 	 * a fixed samplerate (i.e. oscilloscopes and logic analysers).
@@ -233,9 +232,19 @@ DeviceManager::driver_scan(
 	 * @todo Add support for non-monotonic devices (DMMs, sensors, etc).
 	 */
 	const auto keys = driver->config_keys();
-	bool supported_device = keys.count(ConfigKey::LOGIC_ANALYZER) |
-		keys.count(ConfigKey::OSCILLOSCOPE);
-	if (!supported_device)
+
+	return keys.count(ConfigKey::LOGIC_ANALYZER) | keys.count(ConfigKey::OSCILLOSCOPE);
+}
+
+list< shared_ptr<devices::HardwareDevice> >
+DeviceManager::driver_scan(
+	shared_ptr<Driver> driver, map<const ConfigKey *, VariantBase> drvopts)
+{
+	list< shared_ptr<devices::HardwareDevice> > driver_devices;
+
+	assert(driver);
+
+	if (!driver_supported(driver))
 		return driver_devices;
 
 	// Remove any device instances from this driver from the device
diff --git a/pv/devicemanager.hpp b/pv/devicemanager.hpp
index 92ed7dea..9b8ef3d1 100644
--- a/pv/devicemanager.hpp
+++ b/pv/devicemanager.hpp
@@ -70,6 +70,8 @@ public:
 	const list< shared_ptr<devices::HardwareDevice> >& devices() const;
 	shared_ptr<devices::HardwareDevice> user_spec_device() const;
 
+	bool driver_supported(shared_ptr<sigrok::Driver> driver) const;
+
 	list< shared_ptr<devices::HardwareDevice> > driver_scan(
 		shared_ptr<sigrok::Driver> driver,
 		map<const sigrok::ConfigKey *, Glib::VariantBase> drvopts);
-- 
2.30.2