Fix vectored aio bounce handling immediate errors (Avi Kivity)

If a bounced vectored aio fails immediately (the inner aio submission
returning NULL) then the bounce handler erronously returns an aio
request which will never be completed (and which crashes when cancelled).

Fix by detecting that the inner request has failed and propagating the
error.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6892 c046a42c-6fe2-441c-8c8c-71466251a162

diff --git a/block.c b/block.c
index fd09dffb6ce809f330d380eef5d0a92c918a7503..6479072e9b9efabcf75ae613cb9eea93e02f96c5 100644 (file)
--- a/block.c
+++ b/block.c
@@ -1306,6 +1306,11 @@ static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs,
         s->aiocb = bdrv_aio_read(bs, sector_num, s->bounce, nb_sectors,
                                  bdrv_aio_rw_vector_cb, s);
     }
+    if (!s->aiocb) {
+        qemu_vfree(s->bounce);
+        qemu_aio_release(s);
+        return NULL;
+    }
     return &s->common;
 }