From patchwork Mon Jan 24 20:29:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dominik Brodowski X-Patchwork-Id: 536524 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 49397C433FE for ; Mon, 24 Jan 2022 20:43:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234765AbiAXUm7 (ORCPT ); Mon, 24 Jan 2022 15:42:59 -0500 Received: from isilmar-4.linta.de ([136.243.71.142]:46488 "EHLO isilmar-4.linta.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1385547AbiAXUde (ORCPT ); Mon, 24 Jan 2022 15:33:34 -0500 X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES Received: from owl.dominikbrodowski.net (owl.brodo.linta [10.2.0.111]) by isilmar-4.linta.de (Postfix) with ESMTPSA id 380BF20140B; Mon, 24 Jan 2022 20:33:30 +0000 (UTC) Received: by owl.dominikbrodowski.net (Postfix, from userid 1000) id 145B680E5B; Mon, 24 Jan 2022 21:30:16 +0100 (CET) From: Dominik Brodowski To: Matt Mackall , Herbert Xu Cc: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, "Jason A . Donenfeld" Subject: [PATCH 4/6] hw_random: only set cur_rng_set_by_user if it is working Date: Mon, 24 Jan 2022 21:29:49 +0100 Message-Id: <20220124202951.28579-4-linux@dominikbrodowski.net> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124202951.28579-1-linux@dominikbrodowski.net> References: <20220124202951.28579-1-linux@dominikbrodowski.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org In case the user-specified rng device is not working, it is not used; therefore cur_rng_set_by_user must not be set to 1. Cc: Matt Mackall Cc: Herbert Xu Cc: Jason A. Donenfeld Signed-off-by: Dominik Brodowski --- drivers/char/hw_random/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c index 89891ac87af0..9405fcdace38 100644 --- a/drivers/char/hw_random/core.c +++ b/drivers/char/hw_random/core.c @@ -335,8 +335,9 @@ static ssize_t rng_current_store(struct device *dev, } else { list_for_each_entry(rng, &rng_list, list) { if (sysfs_streq(rng->name, buf)) { - cur_rng_set_by_user = 1; err = set_current_rng(rng); + if (!err) + cur_rng_set_by_user = 1; break; } }