commit 8e486c694b422ce19b4c5edc4afd049797891d5f
author songjinshi <songjinshi@xiaomi.com> Thu Apr 04 11:22:52 2019 +0800
committer songjinshi <songjinshi@xiaomi.com> Thu Apr 04 11:41:42 2019 +0800
tree 487ba6b2bc5d378a5324bce95329a3eadadcd615
parent c684ad61dc09296dde8b2189b1e9d790a7d8cc23

[binder]: Use _IOC_NRMASK instead of oxff to filter out the cmd.

See CL 938718 for more information.

Change-Id: I36b18bcbaae4a971283f67b229334da0e42a2f36
signed-off-by: songjinshi <songjinshi@xiaomi.com>

libs/binder/IPCThreadState.cpp

diff --git a/libs/binder/IPCThreadState.cpp b/libs/binder/IPCThreadState.cpp
index 22f6f54..66117bf 100644
--- a/libs/binder/IPCThreadState.cpp
+++ b/libs/binder/IPCThreadState.cpp
@@ -113,7 +113,7 @@
 
 static const char* getReturnString(uint32_t cmd)
 {
-    size_t idx = cmd & 0xff;
+    size_t idx = cmd & _IOC_NRMASK;
     if (idx < sizeof(kReturnStrings) / sizeof(kReturnStrings[0]))
         return kReturnStrings[idx];
     else