From patchwork Thu Oct 10 23:21:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 11184573 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1BBCC112B for ; Thu, 10 Oct 2019 23:21:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 06E96214E0 for ; Thu, 10 Oct 2019 23:21:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726830AbfJJXVL (ORCPT ); Thu, 10 Oct 2019 19:21:11 -0400 Received: from mga07.intel.com ([134.134.136.100]:34955 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726837AbfJJXVL (ORCPT ); Thu, 10 Oct 2019 19:21:11 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 10 Oct 2019 16:21:10 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,281,1566889200"; d="scan'208";a="207300643" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.41]) by fmsmga001.fm.intel.com with ESMTP; 10 Oct 2019 16:21:10 -0700 From: Sean Christopherson To: Jarkko Sakkinen Cc: linux-sgx@vger.kernel.org Subject: [PATCH for_v23 v2 8/9] x86/sgx: Don't update free page count if EPC section allocation fails Date: Thu, 10 Oct 2019 16:21:07 -0700 Message-Id: <20191010232108.27075-9-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20191010232108.27075-1-sean.j.christopherson@intel.com> References: <20191010232108.27075-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 Sender: linux-sgx-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org Update the number of free pages only after an EPC section is fully initialized, else the free page count will be left in a bogus state if allocation fails. Signed-off-by: Sean Christopherson --- arch/x86/kernel/cpu/sgx/main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c index e22cdbb431a3..48a4f37b5b3c 100644 --- a/arch/x86/kernel/cpu/sgx/main.c +++ b/arch/x86/kernel/cpu/sgx/main.c @@ -216,9 +216,10 @@ static bool __init sgx_alloc_epc_section(u64 addr, u64 size, page->desc = (addr + (i << PAGE_SHIFT)) | index; list_add_tail(&page->list, §ion->unsanitized_page_list); - sgx_nr_free_pages++; } + sgx_nr_free_pages += nr_pages; + return true; err_out: