vlib: fix coverity warning

Use correct signed type to allow testing for a failure (-1) from
readlinkat().

Type: fix
Fixes: 5714a49f14
Signed-off-by: Klement Sekera <ksekera@cisco.com>
Change-Id: I06f1c8d91e907c151012ff9758c6b52caca4d625

diff --git a/src/vlib/linux/pci.c b/src/vlib/linux/pci.c
index e049b23..9f0629f 100644 (file)
--- a/src/vlib/linux/pci.c
+++ b/src/vlib/linux/pci.c
@@ -390,7 +390,7 @@ vlib_pci_get_device_root_bus (vlib_pci_addr_t *addr, vlib_pci_addr_t *root_bus)
   u8 *rel_path = 0, *abs_path = 0, *link_path = 0;
   unformat_input_t input;
   int fd = open (sysfs_pci_dev_path, O_RDONLY);
-  u32 size = 0;
+  ssize_t size = 0;
   u32 domain = 0, bus;
   clib_error_t *err = NULL;