smb: client: get rid of kstrdup() when parsing iocharset mount option

Steal string reference from @param->string rather than duplicating it.

Signed-off-by: Paulo Alcantara (Red Hat) <[email protected]>
Reviewed-by: David Howells <[email protected]>
Signed-off-by: Steve French <[email protected]>

Author: pcacjr

fs/smb/client/fs_context.c

@@ -1532,11 +1532,7 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
 
 		if (strncasecmp(param->string, "default", 7) != 0) {
 			kfree(ctx->iocharset);
-			ctx->iocharset = kstrdup(param->string, GFP_KERNEL);
-			if (ctx->iocharset == NULL) {
-				cifs_errorf(fc, "OOM when copying iocharset string\n");
-				goto cifs_parse_mount_err;
-			}
+			ctx->iocharset = no_free_ptr(param->string);
 		}
 		/* if iocharset not set then load_nls_default
 		 * is used by caller