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| author | Martijn Coenen <maco@android.com> | 2017-08-31 10:04:28 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-09-01 09:22:50 +0200 |
| commit | bb74562a7f8398231be20a5c9d36225301a9be31 (patch) | |
| tree | 9a7aa97bc73f96d5a72cd286d9a47905dbe1d8f1 | |
| parent | 858b2719686ddd0ab5fc77479a46d16f90e6b7da (diff) | |
| download | linux-bb74562a7f8398231be20a5c9d36225301a9be31.tar.gz linux-bb74562a7f8398231be20a5c9d36225301a9be31.tar.bz2 linux-bb74562a7f8398231be20a5c9d36225301a9be31.zip | |
ANDROID: binder: don't enqueue death notifications to thread todo.
This allows userspace to request death notifications without
having to worry about getting an immediate callback on the same
thread; one scenario where this would be problematic is if the
death recipient handler grabs a lock that was already taken
earlier (eg as part of a nested transaction).
Signed-off-by: Martijn Coenen <maco@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/android/binder.c | 22 |
1 files changed, 6 insertions, 16 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c index afe6ac37e1ca..b0f039500d80 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -3499,22 +3499,12 @@ static int binder_thread_write(struct binder_proc *proc, ref->death = death; if (ref->node->proc == NULL) { ref->death->work.type = BINDER_WORK_DEAD_BINDER; - if (thread->looper & - (BINDER_LOOPER_STATE_REGISTERED | - BINDER_LOOPER_STATE_ENTERED)) - binder_enqueue_work( - proc, - &ref->death->work, - &thread->todo); - else { - binder_inner_proc_lock(proc); - binder_enqueue_work_ilocked( - &ref->death->work, - &proc->todo); - binder_wakeup_proc_ilocked( - proc); - binder_inner_proc_unlock(proc); - } + + binder_inner_proc_lock(proc); + binder_enqueue_work_ilocked( + &ref->death->work, &proc->todo); + binder_wakeup_proc_ilocked(proc); + binder_inner_proc_unlock(proc); } } else { if (ref->death == NULL) { |