From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 06B772D6E6B; Tue, 26 Aug 2025 11:44:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756208689; cv=none; b=M6uWmGsMq0LmBfVY6UhNUvpl5mol2HSwX2npfVWmJXMukNtxfZTpI4UwMTSGVIGx8ORfIp7qMPRu6AVN0sLj4zEv7UcM3VgeuehfFtDzSRZj2cpNhF0fQV48+cOID6UXlnOcz5/ziInA/GFYWhVqHfycsjmITna3cuYvndmpHNQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756208689; c=relaxed/simple; bh=Q6OD8UPmnpob6nH7B56kjcz4yM8+IG4Ym5eRiAFPFtE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=O6BP+ZMYn1KlmEs792+9v5CWs9mrIRLhUhYMYNRmtWJKiP55sj0qjYommMoHLBmt5oXAWzbzb6fQy3/v7GNlZCuS+h/HUMQaAKo7M53PLZ1LOWPPjo+i4qWruAI63jkfm/owMm01/EXRPB16aS+JA545YzHO0m9tCmncJrnLfSo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=x56kWhRs; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="x56kWhRs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8F95DC4CEF1; Tue, 26 Aug 2025 11:44:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756208688; bh=Q6OD8UPmnpob6nH7B56kjcz4yM8+IG4Ym5eRiAFPFtE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=x56kWhRs3NtrAXUcvuzZbV5W7oN9+AS62IHKAldurJsbl/KIUIgVryS41O90eNgZA 8BqIrwCpdWHxFH9xfNzrC8TpyC5VN36JceZUoZuVq+X4gZktozhK3aIMukL/XmG7dy YhmGeo/289woBJTGgAqrHyeCZ4J/zlYY7tmOCNhA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Srinivas Pandruvada , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Subject: [PATCH 6.12 177/322] platform/x86/intel-uncore-freq: Check write blocked for ELC Date: Tue, 26 Aug 2025 13:09:52 +0200 Message-ID: <20250826110920.232712278@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110915.169062587@linuxfoundation.org> References: <20250826110915.169062587@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Srinivas Pandruvada commit dff6f36878799a5ffabd15336ce993dc737374dc upstream. Add the missing write_blocked check for updating sysfs related to uncore efficiency latency control (ELC). If write operation is blocked return error. Fixes: bb516dc79c4a ("platform/x86/intel-uncore-freq: Add support for efficiency latency control") Signed-off-by: Srinivas Pandruvada Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20250727210513.2898630-1-srinivas.pandruvada@linux.intel.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Greg Kroah-Hartman --- drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c +++ b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c @@ -189,9 +189,14 @@ static int uncore_read_control_freq(stru static int write_eff_lat_ctrl(struct uncore_data *data, unsigned int val, enum uncore_index index) { struct tpmi_uncore_cluster_info *cluster_info; + struct tpmi_uncore_struct *uncore_root; u64 control; cluster_info = container_of(data, struct tpmi_uncore_cluster_info, uncore_data); + uncore_root = cluster_info->uncore_root; + + if (uncore_root->write_blocked) + return -EPERM; if (cluster_info->root_domain) return -ENODATA;