From afe162ceca79c3ec32c5701f682812dc5c18d0aa Mon Sep 17 00:00:00 2001
From: Stephan Maka <stephan@spaceboyz.net>
Date: Fri, 16 Aug 2019 01:13:35 +0200
Subject: [PATCH] firmware: don't unwrap() but propagate pca9548 errors

---
 artiq/firmware/libboard_artiq/pca9548.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/artiq/firmware/libboard_artiq/pca9548.rs b/artiq/firmware/libboard_artiq/pca9548.rs
index 684620d0e..a69d72ed7 100644
--- a/artiq/firmware/libboard_artiq/pca9548.rs
+++ b/artiq/firmware/libboard_artiq/pca9548.rs
@@ -2,10 +2,10 @@ use i2c;
 
 pub fn select(busno: u8, address: u8, channels: u8) -> Result<(), &'static str> {
     i2c::start(busno).unwrap();
-    if !i2c::write(busno, address << 1).unwrap() {
+    if !i2c::write(busno, address << 1)? {
         return Err("PCA9548 failed to ack write address")
     }
-    if !i2c::write(busno, channels).unwrap() {
+    if !i2c::write(busno, channels)? {
         return Err("PCA9548 failed to ack control word")
     }
     i2c::stop(busno).unwrap();