aio: io_getevents() should return if io_destroy() is invoked

[safe/jmp/linux-2.6] / fs / aio.c

diff --git a/fs/aio.c b/fs/aio.c
index 2283686..ae94e1d 100644 (file)
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1166,7 +1166,10 @@ retry:
                                break;
                        if (min_nr <= i)
                                break;
-                       ret = 0;
+                       if (unlikely(ctx->dead)) {
+                               ret = -EINVAL;
+                               break;
+                       }
                        if (to.timed_out)       /* Only check after read evt */
                                break;
                        /* Try to only show up in io wait if there are ops
@@ -1231,6 +1234,13 @@ static void io_destroy(struct kioctx *ioctx)
 
        aio_cancel_all(ioctx);
        wait_for_all_aios(ioctx);
+
+       /*
+        * Wake up any waiters.  The setting of ctx->dead must be seen
+        * by other CPUs at this point.  Right now, we rely on the
+        * locking done by the above calls to ensure this consistency.
+        */
+       wake_up(&ioctx->wait);
        put_ioctx(ioctx);       /* once for the lookup */
 }