From patchwork Wed Sep 13 16:37:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Morse X-Patchwork-Id: 13383508 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 36E56EE01E3 for ; Wed, 13 Sep 2023 16:39:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=IGJ+6pVQ9qnfSDx/SFq2/cLhhSAJ9XJo+2ggd1nK9ZI=; b=BPcdX1r38uWe5S 7YYTIJkR+ZCj59K6ZM6CXUNNgNj2GfuOpHlfZr2rcAyaEYD1Ess+0FKZN5nQVHfjwNhh5+ZDa75Yd wgNuLm63yItoCWbsuKYagDKsFCaL1iZm+f6evNIbnY9k7PjHrCNQp6t/yHiteZOSReAVLudgCaG8h aLjkJj5dPA8hE5wLuwBej9IOdJ5ys/vMkeoKo790JR8qJnYtw0DFju6BOQ4RsG8WnpEcDpb57qD5a TzjWWL3ldwQX3i9wANRWNq2A4+La8NltShsGmmsEs2EMRv9DrLSnJfHdmz66Q7vxoT4oEsWp0VoU4 t2l8vPdpLRGwWqZGzsmA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qgStY-006L5N-2g; Wed, 13 Sep 2023 16:39:16 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qgStL-006KtJ-2t; Wed, 13 Sep 2023 16:39:05 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 42F2DC15; Wed, 13 Sep 2023 09:39:40 -0700 (PDT) Received: from merodach.members.linode.com (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 480883F5A1; Wed, 13 Sep 2023 09:39:01 -0700 (PDT) From: James Morse To: linux-pm@vger.kernel.org, loongarch@lists.linux.dev, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, kvmarm@lists.linux.dev Cc: x86@kernel.org, Salil Mehta , Russell King , Jean-Philippe Brucker , jianyong.wu@arm.com, justin.he@arm.com Subject: [RFC PATCH v2 05/35] drivers: base: Print a warning instead of panic() when register_cpu() fails Date: Wed, 13 Sep 2023 16:37:53 +0000 Message-Id: <20230913163823.7880-6-james.morse@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20230913163823.7880-1-james.morse@arm.com> References: <20230913163823.7880-1-james.morse@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230913_093903_999698_88735C3C X-CRM114-Status: GOOD ( 12.39 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org loongarch, mips, parisc, riscv and sh all print a warning if register_cpu() returns an error. Architectures that use GENERIC_CPU_DEVICES call panic() instead. Errors in this path indicate something is wrong with the firmware description of the platform, but the kernel is able to keep running. Downgrade this to a warning to make it easier to debug this issue. This will allow architectures that switching over to GENERIC_CPU_DEVICES to drop their warning, but keep the existing behaviour. Signed-off-by: James Morse Reviewed-by: Russell King (Oracle) --- drivers/base/cpu.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 579064fda97b..d31c936f0955 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -535,14 +535,15 @@ int __weak arch_register_cpu(int cpu) static void __init cpu_dev_register_generic(void) { - int i; + int i, ret; if (!IS_ENABLED(CONFIG_GENERIC_CPU_DEVICES)) return; for_each_present_cpu(i) { - if (arch_register_cpu(i)) - panic("Failed to register CPU device"); + ret = arch_register_cpu(i); + if (ret) + pr_warn("register_cpu %d failed (%d)\n", i, ret); } }