xen/pciback: Fix error return code in xen_pcibk_attach()

Fix to return -EFAULT from the error handling case instead of 0 when
version mismatch with pcifront.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Reviewed-by Jan Beulich <jbeulich@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/xen/xen-pciback/xenbus.c b/drivers/xen/xen-pciback/xenbus.c
index 4a7e6e0a5f4c..c214daab4829 100644
--- a/drivers/xen/xen-pciback/xenbus.c
+++ b/drivers/xen/xen-pciback/xenbus.c
@@ -174,6 +174,7 @@ static int xen_pcibk_attach(struct xen_pcibk_device *pdev)
                                  "version mismatch (%s/%s) with pcifront - "
                                  "halting " DRV_NAME,
                                  magic, XEN_PCI_MAGIC);
+                err = -EFAULT;
                 goto out;
         }