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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 23339C11F66 for ; Mon, 12 Jul 2021 07:15:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E5CA6147D for ; Mon, 12 Jul 2021 07:15:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244210AbhGLHSG (ORCPT ); Mon, 12 Jul 2021 03:18:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:53144 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239719AbhGLGw7 (ORCPT ); Mon, 12 Jul 2021 02:52:59 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id ACE5E60FDB; Mon, 12 Jul 2021 06:50:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626072611; bh=B1AECimhgtZobjOkyJSuFEf7xLqjXr/PlRwatGwfCPY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=q7B/coz3/I+A+ASPgOol4wpOPfX6vjCSB12chAaDNXb+LyPj1uURy2K8Wa637TI36 A3NIjS2o1usicrGuICo96KNG0c4iP6rjIxEO769sUwYU5bq7oZyYDV/pVYYbMzRGg4 j2nIjoYaon3UgwCkhBRidrWW7lYp6XMnwS8kGVIk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andy Shevchenko , "Aneesh Kumar K.V" , Michael Ellerman , Sasha Levin Subject: [PATCH 5.10 554/593] powerpc/papr_scm: Properly handle UUID types and API Date: Mon, 12 Jul 2021 08:11:54 +0200 Message-Id: <20210712060955.395063837@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060843.180606720@linuxfoundation.org> References: <20210712060843.180606720@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andy Shevchenko [ Upstream commit 0e8554b5d7801b0aebc6c348a0a9f7706aa17b3b ] Parse to and export from UUID own type, before dereferencing. This also fixes wrong comment (Little Endian UUID is something else) and should eliminate the direct strict types assignments. Fixes: 43001c52b603 ("powerpc/papr_scm: Use ibm,unit-guid as the iset cookie") Fixes: 259a948c4ba1 ("powerpc/pseries/scm: Use a specific endian format for storing uuid from the device tree") Signed-off-by: Andy Shevchenko Reviewed-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210616134303.58185-1-andriy.shevchenko@linux.intel.com Signed-off-by: Sasha Levin --- arch/powerpc/platforms/pseries/papr_scm.c | 27 +++++++++++++++-------- 1 file changed, 18 insertions(+), 9 deletions(-) diff --git a/arch/powerpc/platforms/pseries/papr_scm.c b/arch/powerpc/platforms/pseries/papr_scm.c index 835163f54244..0693bc8d70ac 100644 --- a/arch/powerpc/platforms/pseries/papr_scm.c +++ b/arch/powerpc/platforms/pseries/papr_scm.c @@ -18,6 +18,7 @@ #include #include #include +#include #define BIND_ANY_ADDR (~0ul) @@ -1047,8 +1048,9 @@ static int papr_scm_probe(struct platform_device *pdev) u32 drc_index, metadata_size; u64 blocks, block_size; struct papr_scm_priv *p; + u8 uuid_raw[UUID_SIZE]; const char *uuid_str; - u64 uuid[2]; + uuid_t uuid; int rc; /* check we have all the required DT properties */ @@ -1090,16 +1092,23 @@ static int papr_scm_probe(struct platform_device *pdev) p->is_volatile = !of_property_read_bool(dn, "ibm,cache-flush-required"); /* We just need to ensure that set cookies are unique across */ - uuid_parse(uuid_str, (uuid_t *) uuid); + uuid_parse(uuid_str, &uuid); + /* - * cookie1 and cookie2 are not really little endian - * we store a little endian representation of the - * uuid str so that we can compare this with the label - * area cookie irrespective of the endian config with which - * the kernel is built. + * The cookie1 and cookie2 are not really little endian. + * We store a raw buffer representation of the + * uuid string so that we can compare this with the label + * area cookie irrespective of the endian configuration + * with which the kernel is built. + * + * Historically we stored the cookie in the below format. + * for a uuid string 72511b67-0b3b-42fd-8d1d-5be3cae8bcaa + * cookie1 was 0xfd423b0b671b5172 + * cookie2 was 0xaabce8cae35b1d8d */ - p->nd_set.cookie1 = cpu_to_le64(uuid[0]); - p->nd_set.cookie2 = cpu_to_le64(uuid[1]); + export_uuid(uuid_raw, &uuid); + p->nd_set.cookie1 = get_unaligned_le64(&uuid_raw[0]); + p->nd_set.cookie2 = get_unaligned_le64(&uuid_raw[8]); /* might be zero */ p->metadata_size = metadata_size; -- 2.30.2