xen-netback: use kstrdup instead of open-coding it

use kstrdup instead of open-coding it.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Acked-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index e85b3c5..c1ba429 100644 (file)
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -865,13 +865,12 @@ static int connect_data_rings(struct backend_info *be,
         * queue-N.
         */
        if (num_queues == 1) {
-               xspath = kzalloc(strlen(dev->otherend) + 1, GFP_KERNEL);
+               xspath = kstrdup(dev->otherend, GFP_KERNEL);
                if (!xspath) {
                        xenbus_dev_fatal(dev, -ENOMEM,
                                         "reading ring references");
                        return -ENOMEM;
                }
-               strcpy(xspath, dev->otherend);
        } else {
                xspathsize = strlen(dev->otherend) + xenstore_path_ext_size;
                xspath = kzalloc(xspathsize, GFP_KERNEL);