Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20180403' into staging

- fix a memory leak in the ipl code introduced with this release
- increase timeout in the bios to avoid hangs during migration (and
  rebuild bios to activate the change)

# gpg: Signature made Tue 03 Apr 2018 09:28:30 BST
# gpg:                using RSA key DECF6B93C6F02FAF
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>"
# gpg:                 aka "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>"
# gpg:                 aka "Cornelia Huck <cohuck@kernel.org>"
# gpg:                 aka "Cornelia Huck <cohuck@redhat.com>"
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck/tags/s390x-20180403:
  pc-bios/s390-ccw: update image
  pc-bios/s390-ccw: Increase virtio timeout to 30 seconds
  hw/s390x: fix memory leak in s390_init_ipl_dev()
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/s390x/s390-virtio-ccw.c

@@ -246,6 +246,7 @@ static void s390_init_ipl_dev(const char *kernel_filename,
 {
     Object *new = object_new(TYPE_S390_IPL);
     DeviceState *dev = DEVICE(new);
+    char *netboot_fw_prop;
 
     if (kernel_filename) {
         qdev_prop_set_string(dev, "kernel", kernel_filename);
@@ -256,9 +257,11 @@ static void s390_init_ipl_dev(const char *kernel_filename,
     qdev_prop_set_string(dev, "cmdline", kernel_cmdline);
     qdev_prop_set_string(dev, "firmware", firmware);
     qdev_prop_set_bit(dev, "enforce_bios", enforce_bios);
-    if (!strlen(object_property_get_str(new, "netboot_fw", &error_abort))) {
+    netboot_fw_prop = object_property_get_str(new, "netboot_fw", &error_abort);
+    if (!strlen(netboot_fw_prop)) {
         qdev_prop_set_string(dev, "netboot_fw", netboot_fw);
     }
+    g_free(netboot_fw_prop);
     object_property_add_child(qdev_get_machine(), TYPE_S390_IPL,
                               new, NULL);
     object_unref(new);

pc-bios/s390-ccw/virtio.c

@@ -14,7 +14,7 @@
 #include "virtio-scsi.h"
 #include "bswap.h"
 
-#define VRING_WAIT_REPLY_TIMEOUT 3
+#define VRING_WAIT_REPLY_TIMEOUT 30
 
 static VRing block[VIRTIO_MAX_VQS];
 static char ring_area[VIRTIO_RING_SIZE * VIRTIO_MAX_VQS]