diff --git a/.gitignore b/.gitignore
index e90cb2ef..70555175 100644
--- a/.gitignore
+++ b/.gitignore
@@ -88,3 +88,5 @@ driver/kcompat/.scratch/
 
 # Project-local scratch space
 /tmp/
+tmp/
+**/build-host/
diff --git a/driver/libslash/src/qdma.c b/driver/libslash/src/qdma.c
index 5a0aa36e..aaa33cd7 100644
--- a/driver/libslash/src/qdma.c
+++ b/driver/libslash/src/qdma.c
@@ -171,7 +171,9 @@ static ssize_t qdma_fallback_subxfer(int qpair_fd,
         off_t want = (off_t)(x->dev_addr + x->length);
 
         if (fstat(qpair_fd, &st) == 0 && st.st_size < want) {
-            (void)ftruncate(qpair_fd, want);
+            if (ftruncate(qpair_fd, want) != 0) {
+                return -1;
+            }
         }
     }