From patchwork Sun Oct 15 09:19:47 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gilad Ben-Yossef X-Patchwork-Id: 10007069 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6FD9060230 for ; Sun, 15 Oct 2017 09:29:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 60DE728B14 for ; Sun, 15 Oct 2017 09:29:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5390E28FBD; Sun, 15 Oct 2017 09:29:06 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0C71D28B14 for ; Sun, 15 Oct 2017 09:29:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751904AbdJOJVt (ORCPT ); Sun, 15 Oct 2017 05:21:49 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:47232 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751786AbdJOJVp (ORCPT ); Sun, 15 Oct 2017 05:21:45 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id DB058164F; Sun, 15 Oct 2017 02:21:44 -0700 (PDT) Received: from localhost.localdomain (usa-sjc-mx-foss1.foss.arm.com [217.140.101.70]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4D9D33F3E1; Sun, 15 Oct 2017 02:21:36 -0700 (PDT) From: Gilad Ben-Yossef To: Herbert Xu , "David S. Miller" , Jonathan Corbet , David Howells , Tom Lendacky , Gary Hook , Boris Brezillon , Arnaud Ebalard , Matthias Brugger , Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, Steve French , "Theodore Y. Ts'o" , Jaegeuk Kim , Steffen Klassert , Alexey Kuznetsov , Hideaki YOSHIFUJI , Mimi Zohar , Dmitry Kasatkin , James Morris , "Serge E. Hallyn" Cc: Ofir Drang , linux-crypto@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, keyrings@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-fscrypt@vger.kernel.org, netdev@vger.kernel.org, linux-ima-devel@lists.sourceforge.net, linux-ima-user@lists.sourceforge.net, linux-security-module@vger.kernel.org Subject: [PATCH v9 02/20] crypto: ccp: use -EAGAIN for transient busy indication Date: Sun, 15 Oct 2017 10:19:47 +0100 Message-Id: <1508059209-25529-3-git-send-email-gilad@benyossef.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1508059209-25529-1-git-send-email-gilad@benyossef.com> References: <1508059209-25529-1-git-send-email-gilad@benyossef.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Replace -EBUSY with -EAGAIN when reporting transient busy indication in the absence of backlog. Signed-off-by: Gilad Ben-Yossef Reviewed-by: Gary R Hook --- Please squash this patch with the previous one when merging upstream. drivers/crypto/ccp/ccp-crypto-main.c | 8 +++----- drivers/crypto/ccp/ccp-dev.c | 7 +++++-- 2 files changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/crypto/ccp/ccp-crypto-main.c b/drivers/crypto/ccp/ccp-crypto-main.c index 35a9de7..403ff0a 100644 --- a/drivers/crypto/ccp/ccp-crypto-main.c +++ b/drivers/crypto/ccp/ccp-crypto-main.c @@ -222,9 +222,10 @@ static int ccp_crypto_enqueue_cmd(struct ccp_crypto_cmd *crypto_cmd) /* Check if the cmd can/should be queued */ if (req_queue.cmd_count >= CCP_CRYPTO_MAX_QLEN) { - ret = -EBUSY; - if (!(crypto_cmd->cmd->flags & CCP_CMD_MAY_BACKLOG)) + if (!(crypto_cmd->cmd->flags & CCP_CMD_MAY_BACKLOG)) { + ret = -EAGAIN; goto e_lock; + } } /* Look for an entry with the same tfm. If there is a cmd @@ -243,9 +244,6 @@ static int ccp_crypto_enqueue_cmd(struct ccp_crypto_cmd *crypto_cmd) ret = ccp_enqueue_cmd(crypto_cmd->cmd); if (!ccp_crypto_success(ret)) goto e_lock; /* Error, don't queue it */ - if ((ret == -EBUSY) && - !(crypto_cmd->cmd->flags & CCP_CMD_MAY_BACKLOG)) - goto e_lock; /* Not backlogging, don't queue it */ } if (req_queue.cmd_count >= CCP_CRYPTO_MAX_QLEN) { diff --git a/drivers/crypto/ccp/ccp-dev.c b/drivers/crypto/ccp/ccp-dev.c index 4e029b1..3d637e3 100644 --- a/drivers/crypto/ccp/ccp-dev.c +++ b/drivers/crypto/ccp/ccp-dev.c @@ -292,9 +292,12 @@ int ccp_enqueue_cmd(struct ccp_cmd *cmd) i = ccp->cmd_q_count; if (ccp->cmd_count >= MAX_CMD_QLEN) { - ret = -EBUSY; - if (cmd->flags & CCP_CMD_MAY_BACKLOG) + if (cmd->flags & CCP_CMD_MAY_BACKLOG) { + ret = -EBUSY; list_add_tail(&cmd->entry, &ccp->backlog); + } else { + ret = -EAGAIN; + } } else { ret = -EINPROGRESS; ccp->cmd_count++;