From ad1e6db0942ae1eab18cc73bf32c16db81c57a8a Mon Sep 17 00:00:00 2001
From: Ranjib Dey <ranjib@linux.com>
Date: Sat, 15 Jan 2022 23:11:24 -0800
Subject: [PATCH 1/2] take lock before reading map value

---
 pwm/noop_driver.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pwm/noop_driver.go b/pwm/noop_driver.go
index ac19928..163b2ea 100644
--- a/pwm/noop_driver.go
+++ b/pwm/noop_driver.go
@@ -25,7 +25,10 @@ func Noop() (Driver, *recorder) {
 			return nil
 		},
 		readFile: func(f string) ([]byte, error) {
-			if _, ok := rec.values[f]; !ok {
+			rec.mu.Lock()
+			_, ok := rec.values[f]
+			rec.mu.Unlock()
+			if !ok {
 				return []byte{}, nil
 			}
 			return rec.values[f], nil

From 03ca8c9867550cc91d7e5c224f88183ccc8fe596 Mon Sep 17 00:00:00 2001
From: Ranjib Dey <ranjib@linux.com>
Date: Sat, 15 Jan 2022 23:16:43 -0800
Subject: [PATCH 2/2] turn on race detector during test

---
 .github/workflows/go.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 7136518..7972bd7 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -9,5 +9,5 @@ jobs:
         with:
           go-version: '^1.16.1'
       - uses: codecov/codecov-action@v1
-      - run: go test ./...
+      - run: go test -cover -race ./...
       - run: go build ./...