Make sure we grab a reference on the subsystem when a VF is realized.
Otherwise, the subsytem will be unrealized automatically when the VFs
are unregistered and unreffed.
This fixes a latent bug but was not exposed until commit 08f632848008
("pcie: Release references of virtual functions"). This was then fixed
(or rather, hidden) by commit c613ad25125b ("pcie_sriov: Do not manually
unrealize"), but that was then reverted (due to other issues) in commit
b0fdaee5d1ed, exposing the bug yet again.
Cc: qemu-sta...@nongnu.org
Fixes: 08f632848008 ("pcie: Release references of virtual functions")
Reviewed-by: Jesper Wendel Devantier <f...@defmacro.it>
Signed-off-by: Klaus Jensen <k.jen...@samsung.com>
(cherry picked from commit 6651f8f2e5051f6750c2534ab3151339b3c476a2)
Signed-off-by: Michael Tokarev <m...@tls.msk.ru>
diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index fc03a70979..3b5850beda 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -8629,6 +8629,13 @@ static void nvme_realize(PCIDevice *pci_dev, Error
**errp)
*/
n->params.serial = g_strdup(pn->params.serial);
n->subsys = pn->subsys;
+
+ /*
+ * Assigning this link (strong link) causes an `object_unref` later in
+ * `object_release_link_property`. Increment the refcount to balance
+ * this out.
+ */
+ object_ref(OBJECT(pn->subsys));
}
if (!nvme_check_params(n, errp)) {
--
2.39.5
