diff options
Diffstat (limited to 'drivers/char/tpm/xen-tpmfront.c')
| -rw-r--r-- | drivers/char/tpm/xen-tpmfront.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c index 62028f483bba..50072cc4fe5c 100644 --- a/drivers/char/tpm/xen-tpmfront.c +++ b/drivers/char/tpm/xen-tpmfront.c @@ -337,18 +337,14 @@ static int tpmfront_resume(struct xenbus_device *dev) static void backend_changed(struct xenbus_device *dev, enum xenbus_state backend_state) { - int val; - switch (backend_state) { case XenbusStateInitialised: case XenbusStateConnected: if (dev->state == XenbusStateConnected) break; - if (xenbus_scanf(XBT_NIL, dev->otherend, - "feature-protocol-v2", "%d", &val) < 0) - val = 0; - if (!val) { + if (!xenbus_read_unsigned(dev->otherend, "feature-protocol-v2", + 0)) { xenbus_dev_fatal(dev, -EINVAL, "vTPM protocol 2 required"); return; |