selftests: nci: replace unsigned int with int

Should not use comparison of unsigned expressions < 0.

Signed-off-by: Xiang wangx <wangxiang@cdjrlc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/nci/nci_dev.c b/tools/testing/selftests/nci/nci_dev.c
index e1bf55dabdf6569b9da744beeaedf7a57f617e17..162c41e9bcae876be1a503dba0e3d27d3d4b2beb 100644 (file)
--- a/tools/testing/selftests/nci/nci_dev.c
+++ b/tools/testing/selftests/nci/nci_dev.c
@@ -746,7 +746,7 @@ int read_write_nci_cmd(int nfc_sock, int virtual_fd, const __u8 *cmd, __u32 cmd_
                       const __u8 *rsp, __u32 rsp_len)
 {
        char buf[256];
-       unsigned int len;
+       int len;
 
        send(nfc_sock, &cmd[3], cmd_len - 3, 0);
        len = read(virtual_fd, buf, cmd_len);