From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) (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 47A843D8916; Fri, 3 Apr 2026 20:59:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775249977; cv=none; b=m3FDBEOmwvfoxcJmXEvRPpxV70n6dY1Opq1oUlACJz2WTtAvyYxdrvphK0rBNfWV15sxJi2BppqPIhb+1MZC+1ShTrLPIKSgSuw89Lj/LsKIteDWmD2pVFn0KxMxqZf2lxfYZut/KGOY9FVT867lJrLkMIxoSn3DWRornFzk2Nc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775249977; c=relaxed/simple; bh=hyQKvQwp0GaqCbyQ4ZH4jFd7NtavtNNrGg227z+weo4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=T54jZasWe9DC5XsQJQ/Yt+KI3zkaxfbCaAYvWqG72o6o8hxRNxCafE01uYGBPLzLh9At278vdu77W7OiKahouruzLV8GurjRBOrPVrE3FW4LWnsYGXZUqde6S9g1cKPar/OptT9kOvbtlpUEO6N+HGD0TtBO0TdgRbMdjUp82A4= 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=CKBjnZVq; arc=none smtp.client-ip=198.175.65.17 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="CKBjnZVq" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1775249976; x=1806785976; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=hyQKvQwp0GaqCbyQ4ZH4jFd7NtavtNNrGg227z+weo4=; b=CKBjnZVqazPNvvAs3r9jKCqTdB+FzZxxoYB2efwiWGGlbJup5Iv6lKgd AzFrBymBXbgH/JatKn7+Bl64uY5XjBsgIuURWm5lbWT9f+7GNkLoi47xr X/BxFgeTdye+6pG2sIe5qVP5qWw3ieQsBxc2DGyFCqwJOkN+JsWvhhT1+ yGUb4llKX4+dkitYEPxnv+c7Ab7Kix93TCnVSE272o+UmC2svmKH1W3iS haFLZMRS0T69QRpsntFw0ECSFvMFXMN9+Dm640fqVz42GBGt9zEp9Kqs6 r0ykJKCQib9YMK8EIZsOZ+9gcv1hV2wbQ0YO3d31a9GmhWnFI/2hCk+Bj Q==; X-CSE-ConnectionGUID: GsyDkNBpSNy8MDbmupGQfg== X-CSE-MsgGUID: vXAyKcxTQ4ez0sTMVHOAlw== X-IronPort-AV: E=McAfee;i="6800,10657,11748"; a="76281470" X-IronPort-AV: E=Sophos;i="6.23,158,1770624000"; d="scan'208";a="76281470" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Apr 2026 13:59:34 -0700 X-CSE-ConnectionGUID: y8g+Ce2jTiKDL7XeavsahA== X-CSE-MsgGUID: lIDsgZwKTOOiqzznUMDMtA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,158,1770624000"; d="scan'208";a="265280480" Received: from dwillia2-desk.jf.intel.com ([10.88.27.145]) by orviesa001.jf.intel.com with ESMTP; 03 Apr 2026 13:59:33 -0700 From: Dan Williams To: dave.jiang@intel.com Cc: linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org, alejandro.lucero-palau@amd.com Subject: [RFC PATCH 2/4] cxl/region: Move region lock error code to -EBUSY Date: Fri, 3 Apr 2026 14:00:48 -0700 Message-ID: <20260403210050.1058650-3-dan.j.williams@intel.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260403210050.1058650-1-dan.j.williams@intel.com> References: <20260403210050.1058650-1-dan.j.williams@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit -EPERM is permission check. Root is permitted to manage a region, but at any given point in time the region may be busy. In preparation for adding another region operation failure due to region lock, move the existing error indication to -EBUSY. Signed-off-by: Dan Williams --- drivers/cxl/core/region.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index 3edb5703d6de..600c96be0888 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -426,7 +426,7 @@ static ssize_t commit_store(struct device *dev, struct device_attribute *attr, } if (test_bit(CXL_REGION_F_LOCK, &cxlr->flags)) - return -EPERM; + return -EBUSY; rc = queue_reset(cxlr); if (rc) -- 2.53.0