xenbus: simplify xenbus_dev_request_and_reply()

No need to retain a local copy of the full request message, only the
type is really needed.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/xen/xenbus/xenbus_xs.c b/drivers/xen/xenbus/xenbus_xs.c
index 0bd3d47ad24d..22f7cd711c57 100644
--- a/drivers/xen/xenbus/xenbus_xs.c
+++ b/drivers/xen/xenbus/xenbus_xs.c
@@ -232,10 +232,10 @@ static void transaction_resume(void)
 void *xenbus_dev_request_and_reply(struct xsd_sockmsg *msg)
 {
         void *ret;
-        struct xsd_sockmsg req_msg = *msg;
+        enum xsd_sockmsg_type type = msg->type;
         int err;
 
-        if (req_msg.type == XS_TRANSACTION_START)
+        if (type == XS_TRANSACTION_START)
                 transaction_start();
 
         mutex_lock(&xs_state.request_mutex);
@@ -250,8 +250,7 @@ void *xenbus_dev_request_and_reply(struct xsd_sockmsg *msg)
         mutex_unlock(&xs_state.request_mutex);
 
         if ((msg->type == XS_TRANSACTION_END) ||
-            ((req_msg.type == XS_TRANSACTION_START) &&
-             (msg->type == XS_ERROR)))
+            ((type == XS_TRANSACTION_START) && (msg->type == XS_ERROR)))
                 transaction_end();
 
         return ret;