From 402468501d23f4623a9749f4f5e3e79c08f76c71 Mon Sep 17 00:00:00 2001
From: Rob Watson <rob@rfwatson.net>
Date: Mon, 31 Dec 2018 13:07:29 +0100
Subject: [PATCH] alsa: Treat -22 (EINVAL) as an expected error

---
 src/alsa/mod.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/alsa/mod.rs b/src/alsa/mod.rs
index 47d17bfe6..2b0e186d6 100644
--- a/src/alsa/mod.rs
+++ b/src/alsa/mod.rs
@@ -91,7 +91,8 @@ impl Device {
             alsa::SND_PCM_NONBLOCK,
         ) {
             -2 |
-            -16 /* determined empirically */ => return Err(FormatsEnumerationError::DeviceNotAvailable),
+            -16 |
+            -22 /* determined empirically */ => return Err(FormatsEnumerationError::DeviceNotAvailable),
             e => check_errors(e).expect("device not available")
         }