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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8820BC10DCE for ; Mon, 16 Mar 2020 02:41:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 522DA206BE for ; Mon, 16 Mar 2020 02:41:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584326467; bh=jM7Fews3e1MESegyezgjrz7anoNSo3IuYP4oG7HKigc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=L+XZJEAzFsTodMTCX4tQWrPDo58t/PERPYomiWnLg/gZQL3GKLmX5LFQnoUuKWIze VLMYzcpEHCOwQqlisJUNvqCaii+rJbJ4C+rknsZ1W3kO9rVBl6a9xVYbru874ZGpp0 5Ff3GUblrwi/L3xUJusJ4l+ppDo51b684Lnm8h3I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730516AbgCPClG (ORCPT ); Sun, 15 Mar 2020 22:41:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:36686 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729627AbgCPCdr (ORCPT ); Sun, 15 Mar 2020 22:33:47 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D4BF82074E; Mon, 16 Mar 2020 02:33:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584326026; bh=jM7Fews3e1MESegyezgjrz7anoNSo3IuYP4oG7HKigc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mxLr179Nz4iiGBVtCrwbXmmq9XOLdUwTGXhrY6DiwY0j86IX2ISUf6CmIoGUSwV72 8lPwmvWgGRLkT1NTpdpnHD3dNQ7Lqy6J2xKY0C9J4rUqNOIEZ64BeOA1Da7XQaMZam XUPGHW2nLYbSAwug3WOmKy2KWFQ0BQRdo9r4mwVU= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: luanshi , Will Deacon , Sasha Levin , linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 5.5 22/41] drivers/perf: arm_pmu_acpi: Fix incorrect checking of gicc pointer Date: Sun, 15 Mar 2020 22:33:00 -0400 Message-Id: <20200316023319.749-22-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200316023319.749-1-sashal@kernel.org> References: <20200316023319.749-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: luanshi [ Upstream commit 3ba52ad55b533760a1f65836aa0ec9d35e36bb4f ] Fix bogus NULL checks on the return value of acpi_cpu_get_madt_gicc() by checking for a 0 'gicc->performance_interrupt' value instead. Signed-off-by: Liguang Zhang Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- drivers/perf/arm_pmu_acpi.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/perf/arm_pmu_acpi.c b/drivers/perf/arm_pmu_acpi.c index acce8781c456c..f5c7a845cd7bf 100644 --- a/drivers/perf/arm_pmu_acpi.c +++ b/drivers/perf/arm_pmu_acpi.c @@ -24,8 +24,6 @@ static int arm_pmu_acpi_register_irq(int cpu) int gsi, trigger; gicc = acpi_cpu_get_madt_gicc(cpu); - if (WARN_ON(!gicc)) - return -EINVAL; gsi = gicc->performance_interrupt; @@ -64,11 +62,10 @@ static void arm_pmu_acpi_unregister_irq(int cpu) int gsi; gicc = acpi_cpu_get_madt_gicc(cpu); - if (!gicc) - return; gsi = gicc->performance_interrupt; - acpi_unregister_gsi(gsi); + if (gsi) + acpi_unregister_gsi(gsi); } #if IS_ENABLED(CONFIG_ARM_SPE_PMU) -- 2.20.1