From: David Woodhouse <dwmw@amazon.co.uk>
Date: Fri, 10 Jan 2025 09:12:36 +0000 (+0000)
Subject: hw/xen: Use xs_node_read() from xen_netdev_get_name()
X-Git-Tag: pull-xenfv-20250116~3
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=e4e113ecc2d2e4d1bc9d3a70bf01bba4b86f845c;p=users%2Fdwmw2%2Fqemu.git

hw/xen: Use xs_node_read() from xen_netdev_get_name()

Now that xs_node_read() can construct a node path, no need to open-code it.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Anthony PERARD <anthony.perard@vates.tech>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
---

diff --git a/hw/net/xen_nic.c b/hw/net/xen_nic.c
index 97ebd9fa30..5410039490 100644
--- a/hw/net/xen_nic.c
+++ b/hw/net/xen_nic.c
@@ -510,23 +510,22 @@ static char *xen_netdev_get_name(XenDevice *xendev, Error **errp)
 
     if (netdev->dev == -1) {
         XenBus *xenbus = XEN_BUS(qdev_get_parent_bus(DEVICE(xendev)));
-        char fe_path[XENSTORE_ABS_PATH_MAX + 1];
         int idx = (xen_mode == XEN_EMULATE) ? 0 : 1;
+        Error *local_err = NULL;
         char *value;
 
         /* Theoretically we could go up to INT_MAX here but that's overkill */
         while (idx < 100) {
-            snprintf(fe_path, sizeof(fe_path),
-                     "/local/domain/%u/device/vif/%u",
-                     xendev->frontend_id, idx);
-            value = qemu_xen_xs_read(xenbus->xsh, XBT_NULL, fe_path, NULL);
+            value = xs_node_read(xenbus->xsh, XBT_NULL, NULL, &local_err,
+                                 "/local/domain/%u/device/vif/%u",
+                                 xendev->frontend_id, idx);
             if (!value) {
                 if (errno == ENOENT) {
                     netdev->dev = idx;
+                    error_free(local_err);
                     goto found;
                 }
-                error_setg(errp, "cannot read %s: %s", fe_path,
-                           strerror(errno));
+                error_propagate(errp, local_err);
                 return NULL;
             }
             free(value);