From nobody Sun Feb 8 23:04:21 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (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 3627E20468E; Wed, 7 Jan 2026 06:03:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767765786; cv=none; b=fRw17bsmCauKiLv3VJ5FqhlUAceMPzeOY8CzYHIU6FOeikqhFTls+HuZiwfEsfjzc/u5P2k7P3yN0YTubFOyfsQXj0afbySHZMZ3/MVCYydMRPa/pzNrC2e9U23OWHC0N1Ygk5kj8moMwfWP9pcXs1QdeGOsqagUBfioB2Wfjfo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767765786; c=relaxed/simple; bh=h3YP1/3kcOqfQtC9oDt/rAoWE1Mgnw0+zP1KLSf+690=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=V2wJrb9ui2WjLdLWdGbxDdtSgZM7N0ebspJHvrE7by5avbkN8aadLGh17zbl2TgR1o5L+RdoTq4lXv0EsA9w8iNESgC4H4gIpnJ5HF6BuPph5JGatJzX5nqFMYH6zwU5Axx7UfLpYSbIDsboTKvu+fC3Sb26ps7pOI6/8zWn6ao= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Dw6c7FNf; arc=none smtp.client-ip=198.175.65.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Dw6c7FNf" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1767765784; x=1799301784; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=h3YP1/3kcOqfQtC9oDt/rAoWE1Mgnw0+zP1KLSf+690=; b=Dw6c7FNf/pQ/WgKAexH1/+C1ntrwPGnr0/vx6Vu0mhsfl1MAch8Jjnrt USmq4MGBVKsqOVcJwgyCg75iZy3a5nf+PgGH0ozY6sYpKHlK+rv/+R164 3eCwQdmMZ776gWMLRG8e/38OIbJferpRtRDMUBNdG8FwWuE76SejLAne9 sj76f3dSaQrjilhECVpuAWAthJiPCz/BJlrkG6gxqJYYGGooV1/5q5V3w tN+lSQU2GXqTn0rO5VjfnAGNfBV9A9mDOm8anU7Zcu+wICID6/6GpUOzW s/EJm/6f7N+c/RXPqQP/rcM8Y8b2/LpTo8W61Y55l4eAzI0N7ahj0dv1s g==; X-CSE-ConnectionGUID: cNG8ucfAQGCByH6jcOdkZg== X-CSE-MsgGUID: BoLCrRaeQmeJctlqRcNHHA== X-IronPort-AV: E=McAfee;i="6800,10657,11663"; a="79434350" X-IronPort-AV: E=Sophos;i="6.21,207,1763452800"; d="scan'208";a="79434350" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Jan 2026 22:03:02 -0800 X-CSE-ConnectionGUID: E5p8ufV0TEeZTVOmevAMmA== X-CSE-MsgGUID: NT17D5qARpuFFZqbJVEv1w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,207,1763452800"; d="scan'208";a="202746873" Received: from spandruv-desk.jf.intel.com ([10.54.55.20]) by fmviesa006.fm.intel.com with ESMTP; 06 Jan 2026 22:03:02 -0800 From: Srinivas Pandruvada To: hansg@kernel.org, ilpo.jarvinen@linux.intel.com Cc: platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, Srinivas Pandruvada , stable@vger.kernel.org Subject: [PATCH v2 1/2] platform/x86: ISST: Add missing write block check Date: Tue, 6 Jan 2026 22:02:55 -0800 Message-ID: <20260107060256.1634188-2-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260107060256.1634188-1-srinivas.pandruvada@linux.intel.com> References: <20260107060256.1634188-1-srinivas.pandruvada@linux.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: quoted-printable Content-Type: text/plain; charset="utf-8" If writes are blocked, then return error during SST-CP enable command. Add missing write block check in this code path. Fixes: 8bed9ff7dbcc ("platform/x86: ISST: Process read/write blocked featur= e status") Signed-off-by: Srinivas Pandruvada Cc: --- v2: - No change drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c b/= drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c index 34bff2f65a83..f587709ddd47 100644 --- a/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c +++ b/drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c @@ -612,6 +612,9 @@ static long isst_if_core_power_state(void __user *argp) return -EINVAL; =20 if (core_power.get_set) { + if (power_domain_info->write_blocked) + return -EPERM; + _write_cp_info("cp_enable", core_power.enable, SST_CP_CONTROL_OFFSET, SST_CP_ENABLE_START, SST_CP_ENABLE_WIDTH, SST_MUL_FACTOR_NONE) _write_cp_info("cp_prio_type", core_power.priority_type, SST_CP_CONTROL_= OFFSET, --=20 2.52.0