ANDROID: binder: correct the cmd print for BINDER_WORK_RETURN_ERROR

When to execute binder_stat_br the e->cmd has been modifying as BR_OK
instead of the original return error cmd, in fact we want to know the
original return error, such as BR_DEAD_REPLY or BR_FAILED_REPLY, etc.
instead of always BR_OK, in order to avoid the value of the e->cmd is
always BR_OK, so we need assign the value of the e->cmd to cmd before
e->cmd = BR_OK.

Signed-off-by: songjinshi <songjinshi@xiaomi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 35f48a39144c..9c30d38c6f0d 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -3921,10 +3921,11 @@ retry:
                         binder_inner_proc_unlock(proc);
                         if (put_user(e->cmd, (uint32_t __user *)ptr))
                                 return -EFAULT;
+                        cmd = e->cmd;
                         e->cmd = BR_OK;
                         ptr += sizeof(uint32_t);
 
-                        binder_stat_br(proc, thread, e->cmd);
+                        binder_stat_br(proc, thread, cmd);
                 } break;
                 case BINDER_WORK_TRANSACTION_COMPLETE: {
                         binder_inner_proc_unlock(proc);