cifs: move from strlcpy with unused retval to strscpy

Follow the advice of the below link and prefer 'strscpy' in this
subsystem. Conversion is 1:1 because the return value is not used.
Generated by a coccinelle script.

Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/cifsroot.c

@@ -59,7 +59,7 @@ static int __init cifs_root_setup(char *line)
 			pr_err("Root-CIFS: UNC path too long\n");
 			return 1;
 		}
-		strlcpy(root_dev, line, len);
+		strscpy(root_dev, line, len);
 		srvaddr = parse_srvaddr(&line[2], s);
 		if (*s) {
 			int n = snprintf(root_opts,

fs/cifs/connect.c

@@ -3994,7 +3994,7 @@ CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
 		}
 		bcc_ptr += length + 1;
 		bytes_left -= (length + 1);
-		strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
+		strscpy(tcon->treeName, tree, sizeof(tcon->treeName));
 
 		/* mostly informational -- no need to fail on error here */
 		kfree(tcon->nativeFileSystem);

fs/cifs/smb2pdu.c

@@ -1928,7 +1928,7 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
 	tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
 	tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
 	tcon->tid = le32_to_cpu(rsp->hdr.Id.SyncId.TreeId);
-	strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
+	strscpy(tcon->treeName, tree, sizeof(tcon->treeName));
 
 	if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
 	    ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))