From 1a49faafddc013e2996e610cca49d86abf6e7b64 Mon Sep 17 00:00:00 2001
From: "Felipe Ramos (perenecabuto)" <perenecabuto@gmail.com>
Date: Sat, 10 Sep 2016 22:31:52 -0300
Subject: [PATCH 1/3] Close unregistred digitalpins

---
 host/generic/digitalpin.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/host/generic/digitalpin.go b/host/generic/digitalpin.go
index 80a81ea..de7dc8b 100644
--- a/host/generic/digitalpin.go
+++ b/host/generic/digitalpin.go
@@ -7,6 +7,7 @@ package generic
 import (
 	"errors"
 	"fmt"
+	"log"
 	"os"
 	"path"
 	"strconv"
@@ -233,7 +234,7 @@ func (p *digitalPin) Close() error {
 	}
 
 	if err := p.drv.Unregister(p.id); err != nil {
-		return err
+		log.Println("Driver unregister error:", err.Error())
 	}
 
 	if !p.initialized {

From 7368ec8726086837ed7dc130bbf255142daa49e5 Mon Sep 17 00:00:00 2001
From: "Felipe Ramos (perenecabuto)" <perenecabuto@gmail.com>
Date: Sat, 10 Sep 2016 22:33:06 -0300
Subject: [PATCH 2/3] Close exported pin on export failure

---
 host/generic/digitalpin.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/host/generic/digitalpin.go b/host/generic/digitalpin.go
index de7dc8b..3894617 100644
--- a/host/generic/digitalpin.go
+++ b/host/generic/digitalpin.go
@@ -43,6 +43,11 @@ func (p *digitalPin) init() error {
 	if p.initialized {
 		return nil
 	}
+	defer func() {
+		if !p.initialized {
+			p.unexport()
+		}
+	}()
 
 	var err error
 	if err = p.export(); err != nil {

From b597ef340e6336bb1f6d36bf04ada277677f9592 Mon Sep 17 00:00:00 2001
From: "Felipe Ramos (perenecabuto)" <perenecabuto@gmail.com>
Date: Sat, 10 Sep 2016 22:34:54 -0300
Subject: [PATCH 3/3] Wait for sys update after export gpio

---
 host/generic/digitalpin.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/host/generic/digitalpin.go b/host/generic/digitalpin.go
index 3894617..ad14f26 100644
--- a/host/generic/digitalpin.go
+++ b/host/generic/digitalpin.go
@@ -73,8 +73,9 @@ func (p *digitalPin) export() error {
 	if err != nil {
 		return err
 	}
-	defer exporter.Close()
 	_, err = exporter.WriteString(strconv.Itoa(p.n))
+	exporter.Close()
+	time.Sleep(time.Second / 2)
 	return err
 }
 
@@ -83,8 +84,9 @@ func (p *digitalPin) unexport() error {
 	if err != nil {
 		return err
 	}
-	defer unexporter.Close()
 	_, err = unexporter.WriteString(strconv.Itoa(p.n))
+	unexporter.Close()
+	time.Sleep(time.Second / 2)
 	return err
 }