From mboxrd@z Thu Jan 1 00:00:00 1970 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 72C93CCA49F for ; Mon, 13 Jun 2022 13:59:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1380543AbiFMN7C (ORCPT ); Mon, 13 Jun 2022 09:59:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35868 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1380338AbiFMNyH (ORCPT ); Mon, 13 Jun 2022 09:54:07 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 237C642EFC; Mon, 13 Jun 2022 04:34:56 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 8E1E1B80EC7; Mon, 13 Jun 2022 11:34:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09B1CC3411F; Mon, 13 Jun 2022 11:34:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1655120093; bh=wH7/90BcNZzwB2bJOgzMEcaResWqJwE5uqhLmPT9ENA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=plhwczOrxv8KhMOrOQypvl5Pyv9UJDyZNZBZS6JsLXjCW72DapxDc6OIm/4u5a7L4 X+UbwbBKaaiWjgSsqOCf9o9oB48HmtzEw0BiaIDnvX4Qob9OK44ykFxM08ZSkl/J1D I9ly82FEGO9OJagxQraWmqYElCGLFQFm4XGCcNHs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andre Przywara , Robin Murphy , Daniel Lezcano , Sasha Levin Subject: [PATCH 5.18 248/339] clocksource/drivers/sp804: Avoid error on multiple instances Date: Mon, 13 Jun 2022 12:11:13 +0200 Message-Id: <20220613094934.176246058@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220613094926.497929857@linuxfoundation.org> References: <20220613094926.497929857@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Andre Przywara [ Upstream commit a98399cbc1e05f7b977419f03905501d566cf54e ] When a machine sports more than one SP804 timer instance, we only bring up the first one, since multiple timers of the same kind are not useful to Linux. As this is intentional behaviour, we should not return an error message, as we do today: =============== [ 0.000800] Failed to initialize '/bus@8000000/motherboard-bus@8000000/iofpga-bus@300000000/timer@120000': -22 =============== Replace the -EINVAL return with a debug message and return 0 instead. Also we do not reach the init function anymore if the DT node is disabled (as this is now handled by OF_DECLARE), so remove the explicit check for that case. This fixes a long standing bogus error when booting ARM's fastmodels. Signed-off-by: Andre Przywara Reviewed-by: Robin Murphy Link: https://lore.kernel.org/r/20220506162522.3675399-1-andre.przywara@arm.com Signed-off-by: Daniel Lezcano Signed-off-by: Sasha Levin --- drivers/clocksource/timer-sp804.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/clocksource/timer-sp804.c b/drivers/clocksource/timer-sp804.c index 401d592e85f5..e6a87f4af2b5 100644 --- a/drivers/clocksource/timer-sp804.c +++ b/drivers/clocksource/timer-sp804.c @@ -259,6 +259,11 @@ static int __init sp804_of_init(struct device_node *np, struct sp804_timer *time struct clk *clk1, *clk2; const char *name = of_get_property(np, "compatible", NULL); + if (initialized) { + pr_debug("%pOF: skipping further SP804 timer device\n", np); + return 0; + } + base = of_iomap(np, 0); if (!base) return -ENXIO; @@ -270,11 +275,6 @@ static int __init sp804_of_init(struct device_node *np, struct sp804_timer *time writel(0, timer1_base + timer->ctrl); writel(0, timer2_base + timer->ctrl); - if (initialized || !of_device_is_available(np)) { - ret = -EINVAL; - goto err; - } - clk1 = of_clk_get(np, 0); if (IS_ERR(clk1)) clk1 = NULL; -- 2.35.1