From b0430ebfe223415aa0bbfa243daad87234f28626 Mon Sep 17 00:00:00 2001
From: Robert Falkenberg <robert.falkenberg@srs.io>
Date: Wed, 6 Oct 2021 14:53:27 +0200
Subject: [PATCH] rf_imp.c: fix segfault when closing RF device with no AGC
 thread

---
 lib/src/phy/rf/rf_imp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/src/phy/rf/rf_imp.c b/lib/src/phy/rf/rf_imp.c
index bccfe5758..f7b55a502 100644
--- a/lib/src/phy/rf/rf_imp.c
+++ b/lib/src/phy/rf/rf_imp.c
@@ -181,7 +181,9 @@ int srsran_rf_close(srsran_rf_t* rf)
   }
   pthread_mutex_unlock(&rf->mutex);
   pthread_cond_signal(&rf->cond);
-  pthread_join(rf->thread_gain, NULL);
+  if (rf->thread_gain) {
+    pthread_join(rf->thread_gain, NULL);
+  }
 
   return ((rf_dev_t*)rf->dev)->srsran_rf_close(rf->handler);
 }