commit 9ea7a46e2674edc84f056fc66c6f642d88b0c9ee
author John Snow <jsnow@redhat.com> Mon Sep 26 14:33:37 2016 -0400
committer Michael Roth <mdroth@linux.vnet.ibm.com> Wed Sep 28 11:54:06 2016 -0500
tree 1c8ec211323a9021017a1f3a4b051e0989aecd56
parent 1c57ced0c47f2df8fc06b2f697a399074d715f94

ahci: clear aiocb in ncq_cb

Similar to existing fixes for IDE (87ac25fd) and ATAPI (7f951b2d), the
AIOCB must be cleared in the callback. Otherwise, we may accidentally
try to reset a dangling pointer in bdrv_aio_cancel() from a port reset.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1474575040-32079-2-git-send-email-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

hw/ide/ahci.c

diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index a1e6516..b49fc5c 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -948,6 +948,7 @@
     NCQTransferState *ncq_tfs = (NCQTransferState *)opaque;
     IDEState *ide_state = &ncq_tfs->drive->port.ifs[0];
 
+    ncq_tfs->aiocb = NULL;
     if (ret == -ECANCELED) {
         return;
     }