From patchwork Tue Feb 12 11:10:10 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Atish Patra X-Patchwork-Id: 10807703 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6AD2313B4 for ; Tue, 12 Feb 2019 11:10:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 57BA02B2AA for ; Tue, 12 Feb 2019 11:10:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4BCB32B2D6; Tue, 12 Feb 2019 11:10:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id DA9E12B2AA for ; Tue, 12 Feb 2019 11:10:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=xyDOVltDhEVfD/vtxa6yUM45HIeX+CH07SYiRAH/tPE=; b=VWKwkc4tzIYbqcpFn1POS9yGjS ywWouMdCM4mmSJSHwFLmmhuQpRD+1HjOzc9MqtRmJJIWtpkn0EELvne0+6j9RACIQVTDnErPbBd+B 4m8frC60NJjcI08Jenvdvf1mmDZixkJVPz2ADN2glJ8knvkf35gB6B2g0gRgYHcPqId6J0OWr/ICX 1YqDcNjSpLOPMvgmADUM2p1HBNxLAg7lLbhIXVAo4KBUgxlMG+CdNE8HA4fyBouCAAaf+h3i2X+Nd 4ZRyiYSHuCRF5xLwDG8cOhnD2GCJrs4+zC8/3TneLrr0nqnyh0UzKHyJerkl4S0W6DTYCDM2s94Ae ugXITNEA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gtVxa-00036s-8V; Tue, 12 Feb 2019 11:10:42 +0000 Received: from esa5.hgst.iphmx.com ([216.71.153.144]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gtVxQ-0002tv-0M for linux-riscv@lists.infradead.org; Tue, 12 Feb 2019 11:10:34 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1549969832; x=1581505832; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=vnRdayaz5Pz6NDhpDj4PwPWoeZAvCxUKf5wSxkfkfNk=; b=rkqQfTaY9fmAQvr+ItUrDjIP8TTW1X6EjnsDxIJwbpt35gchSGAGIIhR a4UAWG3dCV2Upim+V4U5nLDeCSAaSqGjYs2M60CNzk1l57cvz4wPv4wyH dmLYiOQ7s5UrkOcxs+PBa0grFLI9nsCOLH6EtFOn0Fq7PyBTJmT1UbuNY y+FQ0XCwFaRT+ogTS0pHXq1R3EqgHKO8KHAQThNUJ1zhaFBiTy4CU853e CdBirrmLKxQzUbkmJEZK/lvCYTGuthxQalh9nNjxSfILKBEY4tSCUqUeD ZXdSn3WHQPYNoJLyhNAYnPTbpyFtdLmAIckns4EqQ9okKu96yU3I3pUBL Q==; X-IronPort-AV: E=Sophos;i="5.58,361,1544457600"; d="scan'208";a="102308202" Received: from uls-op-cesaip01.wdc.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 12 Feb 2019 19:10:22 +0800 Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep01.wdc.com with ESMTP; 12 Feb 2019 02:48:58 -0800 Received: from jedi-01.sdcorp.global.sandisk.com (HELO jedi-01.int.fusionio.com) ([10.11.143.218]) by uls-op-cesaip02.wdc.com with ESMTP; 12 Feb 2019 03:10:22 -0800 From: Atish Patra To: linux-riscv@lists.infradead.org Subject: [v4 PATCH 6/8] clocksource/drivers/riscv: Add required checks during clock source init Date: Tue, 12 Feb 2019 03:10:10 -0800 Message-Id: <1549969812-22502-7-git-send-email-atish.patra@wdc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1549969812-22502-1-git-send-email-atish.patra@wdc.com> References: <1549969812-22502-1-git-send-email-atish.patra@wdc.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190212_031032_292634_BDF0C473 X-CRM114-Status: GOOD ( 11.60 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Herring , Albert Ou , Jason Cooper , Alan Kao , Dmitriy Cherkasov , Anup Patel , Daniel Lezcano , Johan Hovold , linux-kernel@vger.kernel.org, Atish Patra , Palmer Dabbelt , Paul Walmsley , Andreas Schwab , Marc Zyngier , Thomas Gleixner MIME-Version: 1.0 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Currently, clocksource registration happens for an invalid cpu for non-smp kernels. This lead to kernel panic as cpu hotplug registration will fail for those cpus. Moreover, riscv_hartid_to_cpuid can return errors now. Do not proceed if hartid or cpuid is invalid. Take this opprtunity to print appropriate error strings for different failure cases. Signed-off-by: Atish Patra Reviewed-by: Anup Patel Reviewed-by: Palmer Dabbelt --- drivers/clocksource/timer-riscv.c | 23 ++++++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-) diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c index 43189220..e8163693 100644 --- a/drivers/clocksource/timer-riscv.c +++ b/drivers/clocksource/timer-riscv.c @@ -95,13 +95,30 @@ static int __init riscv_timer_init_dt(struct device_node *n) struct clocksource *cs; hartid = riscv_of_processor_hartid(n); + if (hartid < 0) { + pr_warn("Not valid hartid for node [%pOF] error = [%d]\n", + n, hartid); + return hartid; + } + cpuid = riscv_hartid_to_cpuid(hartid); + if (cpuid < 0) { + pr_warn("Invalid cpuid for hartid [%d]\n", hartid); + return cpuid; + } if (cpuid != smp_processor_id()) return 0; + pr_info("%s: Registering clocksource cpuid [%d] hartid [%d]\n", + __func__, cpuid, hartid); cs = per_cpu_ptr(&riscv_clocksource, cpuid); - clocksource_register_hz(cs, riscv_timebase); + error = clocksource_register_hz(cs, riscv_timebase); + if (error) { + pr_err("RISCV timer register failed [%d] for cpu = [%d]\n", + error, cpuid); + return error; + } sched_clock_register(riscv_sched_clock, BITS_PER_LONG, riscv_timebase); @@ -110,8 +127,8 @@ static int __init riscv_timer_init_dt(struct device_node *n) "clockevents/riscv/timer:starting", riscv_timer_starting_cpu, riscv_timer_dying_cpu); if (error) - pr_err("RISCV timer register failed [%d] for cpu = [%d]\n", - error, cpuid); + pr_err("cpu hp setup state failed for RISCV timer [%d]\n", + error); return error; }