From patchwork Fri Mar 25 15:04:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 554329 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F2E1FC433F5 for ; Fri, 25 Mar 2022 15:05:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359528AbiCYPHB (ORCPT ); Fri, 25 Mar 2022 11:07:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34284 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356712AbiCYPGm (ORCPT ); Fri, 25 Mar 2022 11:06:42 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DEA09D95FB; Fri, 25 Mar 2022 08:05:03 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 370C261B97; Fri, 25 Mar 2022 15:05:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3F953C340E9; Fri, 25 Mar 2022 15:05:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1648220702; bh=RuC+1rqugxNuew2WMFrSfKADvorEHXodJr0P7fQnOpU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G7HooegSsS4DY8g+NUJeJTybYqO2/I3ytqKT623q4SfWt9VV+SCCfnIpAvddy+IdP s82hD9Yfn+tl+XFDXz6laU2zlqXrBAZUk2C5CgNgwJzlaWe8ZQEIZGonkCgULdK2ch 4k6kJk3QFGK6rF748PCXq8xVzCQGAsCkJ9Aizq08= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Giovanni Cabiddu , Herbert Xu Subject: [PATCH 4.9 13/14] crypto: qat - disable registration of algorithms Date: Fri, 25 Mar 2022 16:04:41 +0100 Message-Id: <20220325150416.084395159@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220325150415.694544076@linuxfoundation.org> References: <20220325150415.694544076@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Giovanni Cabiddu commit 8893d27ffcaf6ec6267038a177cb87bcde4dd3de upstream. The implementations of aead and skcipher in the QAT driver do not support properly requests with the CRYPTO_TFM_REQ_MAY_BACKLOG flag set. If the HW queue is full, the driver returns -EBUSY but does not enqueue the request. This can result in applications like dm-crypt waiting indefinitely for a completion of a request that was never submitted to the hardware. To avoid this problem, disable the registration of all crypto algorithms in the QAT driver by setting the number of crypto instances to 0 at configuration time. Cc: stable@vger.kernel.org Signed-off-by: Giovanni Cabiddu Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/qat/qat_common/qat_crypto.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/drivers/crypto/qat/qat_common/qat_crypto.c +++ b/drivers/crypto/qat/qat_common/qat_crypto.c @@ -170,6 +170,14 @@ int qat_crypto_dev_config(struct adf_acc goto err; if (adf_cfg_section_add(accel_dev, "Accelerator0")) goto err; + + /* Temporarily set the number of crypto instances to zero to avoid + * registering the crypto algorithms. + * This will be removed when the algorithms will support the + * CRYPTO_TFM_REQ_MAY_BACKLOG flag + */ + instances = 0; + for (i = 0; i < instances; i++) { val = i; snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_BANK_NUM, i);