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 4FD48CCA491 for ; Mon, 13 Jun 2022 10:31:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236689AbiFMKbT (ORCPT ); Mon, 13 Jun 2022 06:31:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345273AbiFMK3c (ORCPT ); Mon, 13 Jun 2022 06:29:32 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7BE3419038; Mon, 13 Jun 2022 03:20:45 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 376B160AE9; Mon, 13 Jun 2022 10:20:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 49856C34114; Mon, 13 Jun 2022 10:20:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1655115644; bh=hlnHV9qWZW7tUMGFlHkHHL18x1Xe43DL4U5v+DmOgXI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sKEaXjf5aABuNlSBLjFRrhtCcISF2VuYfM/BZUcoLPxDZrKRUpdlaaPpw23LfcVsq PvHQgjRxwnQMrKJegurw9W3yN2bGQjyCBF43491kbadj+bQ83nw1wUuDKAZLYzNwbg sg7B/m2SgLV8rWiKlY4GFPfC8KBiEox8wTBZck64= 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 4.9 149/167] clocksource/drivers/sp804: Avoid error on multiple instances Date: Mon, 13 Jun 2022 12:10:23 +0200 Message-Id: <20220613094915.813526784@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220613094840.720778945@linuxfoundation.org> References: <20220613094840.720778945@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: linux-kernel@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 d07863388e05..780699e4d120 100644 --- a/drivers/clocksource/timer-sp804.c +++ b/drivers/clocksource/timer-sp804.c @@ -227,6 +227,11 @@ static int __init sp804_of_init(struct device_node *np) 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; @@ -235,11 +240,6 @@ static int __init sp804_of_init(struct device_node *np) writel(0, base + TIMER_CTRL); writel(0, base + TIMER_2_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