diff --git a/service/95-afc.rules b/service/95-afc.rules
index cca91ad..c54c2cd 100644
--- a/service/95-afc.rules
+++ b/service/95-afc.rules
@@ -1 +1 @@
-SUBSYSTEM=="pci", ATTR{vendor}=="0x10ee", ATTR{subsystem_device}=="0x0007", RUN+="/usr/bin/setpci -s %k COMMAND=0x2", RUN+="/bin/sh -c 'chmod 666 /sys/bus/pci/devices/%k/resource*'", RUN+="/opt/afc-epics-ioc/service/ioc-start.sh %k"
+SUBSYSTEM=="pci", ATTR{vendor}=="0x10ee", ATTR{subsystem_device}=="0x0007", RUN+="/opt/afc-epics-ioc/service/ioc-start.sh %k"
diff --git a/service/ioc-start.sh b/service/ioc-start.sh
index 0f4aede..2038b16 100755
--- a/service/ioc-start.sh
+++ b/service/ioc-start.sh
@@ -3,6 +3,32 @@ set -eu
 
 DEV=$1
 
+setpci -s $DEV COMMAND=0x2
+
+resource_files=""
+for suffix in 0 2 2_wc 4; do
+    resource_files="$resource_files /sys/bus/pci/devices/$DEV/resource$suffix"
+done
+resource_files_exist() {
+    for f in $resource_files; do
+        if [ ! -f $f ]; then
+            return 1
+        fi
+    done
+
+    return 0
+}
+
+count=0
+until resource_files_exist; do
+    if [ $count -eq 10 ]; then
+        exit 1
+    fi
+    count=$((count + 1))
+    sleep .1
+done
+chmod 666 $resource_files
+
 devslot=
 for slot in /sys/bus/pci/slots/* ; do
     ADDR=$(cat ${slot}/address)