From patchwork Thu Nov 7 20:58:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 13867136 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4213D21A4B2; Thu, 7 Nov 2024 20:58:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731013123; cv=none; b=sJzjKnZemUcbVsqHprccSy7L7U/0zHb1k5UY0DRrus/rPQ1Yu2dEegTNP+aiA6YFRrJLs3AwnOErTY2eTqJYNjBplHMZ/a+CN44SX8mqxsn8y99EgiupXNfiZh3s95CYTKgBgivqVx2mb26JBgZtUC9mjDHBesDaqbt33XzbtK4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731013123; c=relaxed/simple; bh=LLABFCK37K/MhI03Fb+yWDspPbVRYojKovJHMZlMT18=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=RScxpfpArGZmqJ7zc6qNw7YTvvCfExvHDE8Lyf69g5d40QgA/gY5uhhgmcn8D0dBx8gifF7thAWAAviBSDHBquL4/E1zpUV3MPNzZEoBDEeNIQZbJkDdkHSe900FfnzVcpVBmZHO3cSCegppn6Ww6XO2Gu8ASpxznV8oQdmFgDg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=EBngy4r7; arc=none smtp.client-ip=192.198.163.18 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="EBngy4r7" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1731013121; x=1762549121; h=from:date:subject:mime-version:content-transfer-encoding: message-id:references:in-reply-to:to:cc; bh=LLABFCK37K/MhI03Fb+yWDspPbVRYojKovJHMZlMT18=; b=EBngy4r7C/0UL6wwpjoY52Fa8iVcWxMESdGi0Y5LXfFfw/wpY8+LrZsv hgZ7yLbXaNBfMj2zcvaByXvcmlYP9vUEBu1SH6xOLAkyJLD8yLDp+n4RD DMYtSuOQpS0HpjB0HShIostxUuaZut7C1F187VW8uhWam1VXVve9yzZ3j 3bgh8QfkhLrNfMme0RuuL3P0RZHLOAI7PfDWUU+Y6VTzOaC82/6SmEXE8 3Q8sTCJ+lRlsX+cgHZC5GF3ZLu+M46Eh5Muhe5Z4uMO1PfUH+FYP2jcCQ 8SNqs1jkQG6fcJa2jBjcOt2sh2bzEOS3YBbKb9OzSjtHra1+kzTVOuNJY A==; X-CSE-ConnectionGUID: 6VX5jqEGSIuNM16iUwVI4Q== X-CSE-MsgGUID: aotUn4zTQfGFfnNRWeo4/Q== X-IronPort-AV: E=McAfee;i="6700,10204,11249"; a="30300346" X-IronPort-AV: E=Sophos;i="6.12,136,1728975600"; d="scan'208";a="30300346" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2024 12:58:40 -0800 X-CSE-ConnectionGUID: xley0tb9TqmmrYTciajhvg== X-CSE-MsgGUID: Elgy6iYITy+D1y1G1ytgwA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,136,1728975600"; d="scan'208";a="90093610" Received: from aschofie-mobl2.amr.corp.intel.com (HELO localhost) ([10.125.110.195]) by orviesa005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2024 12:58:39 -0800 From: Ira Weiny Date: Thu, 07 Nov 2024 14:58:23 -0600 Subject: [PATCH v7 05/27] cxl/hdm: Use guard() in cxl_dpa_set_mode() Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241107-dcd-type2-upstream-v7-5-56a84e66bc36@intel.com> References: <20241107-dcd-type2-upstream-v7-0-56a84e66bc36@intel.com> In-Reply-To: <20241107-dcd-type2-upstream-v7-0-56a84e66bc36@intel.com> To: Dave Jiang , Fan Ni , Jonathan Cameron , Navneet Singh , Jonathan Corbet , Andrew Morton Cc: Dan Williams , Davidlohr Bueso , Alison Schofield , Vishal Verma , Ira Weiny , linux-cxl@vger.kernel.org, linux-doc@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, Jonathan Cameron X-Mailer: b4 0.15-dev-2a633 X-Developer-Signature: v=1; a=ed25519-sha256; t=1731013104; l=2085; i=ira.weiny@intel.com; s=20221211; h=from:subject:message-id; bh=LLABFCK37K/MhI03Fb+yWDspPbVRYojKovJHMZlMT18=; b=KTcY7j4rhCzvnM1flH25sLGGRrHai72moyRVs3M3OOBwZWfMePnYfpNpfn3tgljCtRSzEsOVY lwwB8i4cSrTBiC5yPlyvg67b73nsnM3cQVJybLSEjTwljuABas9fTGT X-Developer-Key: i=ira.weiny@intel.com; a=ed25519; pk=noldbkG+Wp1qXRrrkfY1QJpDf7QsOEthbOT7vm0PqsE= Additional DCD functionality is being added to this call which will be simplified by the use of guard() with the cxl_dpa_rwsem. Convert the function to use guard() prior to adding DCD functionality. Suggested-by: Jonathan Cameron Reviewed-by: Jonathan Cameron Reviewed-by: Davidlohr Bueso Signed-off-by: Ira Weiny --- drivers/cxl/core/hdm.c | 21 ++++++--------------- 1 file changed, 6 insertions(+), 15 deletions(-) diff --git a/drivers/cxl/core/hdm.c b/drivers/cxl/core/hdm.c index 3df10517a3278f228c7535fcbdb607d7b75bc879..463ba2669cea55194e2be2c26d02af75dde8d145 100644 --- a/drivers/cxl/core/hdm.c +++ b/drivers/cxl/core/hdm.c @@ -424,7 +424,6 @@ int cxl_dpa_set_mode(struct cxl_endpoint_decoder *cxled, struct cxl_memdev *cxlmd = cxled_to_memdev(cxled); struct cxl_dev_state *cxlds = cxlmd->cxlds; struct device *dev = &cxled->cxld.dev; - int rc; switch (mode) { case CXL_DECODER_RAM: @@ -435,11 +434,9 @@ int cxl_dpa_set_mode(struct cxl_endpoint_decoder *cxled, return -EINVAL; } - down_write(&cxl_dpa_rwsem); - if (cxled->cxld.flags & CXL_DECODER_F_ENABLE) { - rc = -EBUSY; - goto out; - } + guard(rwsem_write)(&cxl_dpa_rwsem); + if (cxled->cxld.flags & CXL_DECODER_F_ENABLE) + return -EBUSY; /* * Only allow modes that are supported by the current partition @@ -447,21 +444,15 @@ int cxl_dpa_set_mode(struct cxl_endpoint_decoder *cxled, */ if (mode == CXL_DECODER_PMEM && !resource_size(&cxlds->pmem_res)) { dev_dbg(dev, "no available pmem capacity\n"); - rc = -ENXIO; - goto out; + return -ENXIO; } if (mode == CXL_DECODER_RAM && !resource_size(&cxlds->ram_res)) { dev_dbg(dev, "no available ram capacity\n"); - rc = -ENXIO; - goto out; + return -ENXIO; } cxled->mode = mode; - rc = 0; -out: - up_write(&cxl_dpa_rwsem); - - return rc; + return 0; } int cxl_dpa_alloc(struct cxl_endpoint_decoder *cxled, unsigned long long size)