commit fabc783d4db6181772e0426ea8665d101169cfd7
author Philip Cuadra <philipcuadra@google.com> Thu Mar 23 10:05:45 2017 -0700
committer Philip Cuadra <philipcuadra@google.com> Mon Apr 24 17:59:20 2017 -0700
tree af1cb88d22e7956ecd22f69c74290b65fa31affa
parent bfbdfcad3276fa290e3ec9cccbf3883c5c014167

Allow Bluetooth HAL CAP_SYS_NICE

The Bluetooth HAL has threads that process Bluetooth audio.  They need
to be scheduled as RT priority, so allow the Bluetooth HAL to set its
threads to RT scheduling.

Bug 37518404
Test:  play Bluetooth audio, confirm priority via systrace
Change-Id: I4928cf182a0805c0714e4d073cba15c864fbe328

libcutils/fs_config.c

diff --git a/libcutils/fs_config.c b/libcutils/fs_config.c
index 6e5db0b..e1e8c8d 100644
--- a/libcutils/fs_config.c
+++ b/libcutils/fs_config.c
@@ -189,8 +189,10 @@
                                            CAP_MASK_LONG(CAP_NET_RAW),
                                               "system/bin/hostapd" },
 
-    /* Support Bluetooth legacy hal accessing /sys/class/rfkill */
-    { 00700, AID_BLUETOOTH, AID_BLUETOOTH, CAP_MASK_LONG(CAP_NET_ADMIN),
+    /* Support Bluetooth legacy hal accessing /sys/class/rfkill
+     * Support RT scheduling in Bluetooth */
+    { 00700, AID_BLUETOOTH, AID_BLUETOOTH, CAP_MASK_LONG(CAP_NET_ADMIN) |
+                                           CAP_MASK_LONG(CAP_SYS_NICE),
                                               "vendor/bin/hw/android.hardware.bluetooth@1.0-service" },
 
     /* Support wifi_hal_legacy administering a network interface. */