From patchwork Tue Mar 19 14:54:27 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eduardo Valentin X-Patchwork-Id: 2301441 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 70272DFB79 for ; Tue, 19 Mar 2013 14:59:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932568Ab3CSO66 (ORCPT ); Tue, 19 Mar 2013 10:58:58 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:56894 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932223Ab3CSO64 (ORCPT ); Tue, 19 Mar 2013 10:58:56 -0400 Received: from dlelxv30.itg.ti.com ([172.17.2.17]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id r2JEwsV2018489; Tue, 19 Mar 2013 09:58:54 -0500 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv30.itg.ti.com (8.13.8/8.13.8) with ESMTP id r2JEws79012148; Tue, 19 Mar 2013 09:58:54 -0500 Received: from dlelxv23.itg.ti.com (172.17.1.198) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.2.342.3; Tue, 19 Mar 2013 09:58:54 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dlelxv23.itg.ti.com (8.13.8/8.13.8) with ESMTP id r2JEwsK8025980; Tue, 19 Mar 2013 09:58:54 -0500 Received: from localhost (h64-11.vpn.ti.com [172.24.64.11]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id r2JEwpV13482; Tue, 19 Mar 2013 09:58:51 -0500 (CDT) From: Eduardo Valentin To: CC: , , , , Eduardo Valentin Subject: [PATCHv2 11/12] staging: ti-soc-thermal: fix bitfield writing while updating thresholds Date: Tue, 19 Mar 2013 10:54:27 -0400 Message-ID: <1363704868-11843-12-git-send-email-eduardo.valentin@ti.com> X-Mailer: git-send-email 1.7.7.1.488.ge8e1c In-Reply-To: <1363704868-11843-1-git-send-email-eduardo.valentin@ti.com> References: <1363704868-11843-1-git-send-email-eduardo.valentin@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Wrong threshold cold values may be written with current implementation. This patch fixes the threshold update function by simplifying the bitfield manipulation sequence. Signed-off-by: Eduardo Valentin --- drivers/staging/ti-soc-thermal/ti-bandgap.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/staging/ti-soc-thermal/ti-bandgap.c b/drivers/staging/ti-soc-thermal/ti-bandgap.c index d075186..5c946cd 100644 --- a/drivers/staging/ti-soc-thermal/ti-bandgap.c +++ b/drivers/staging/ti-soc-thermal/ti-bandgap.c @@ -418,10 +418,10 @@ static int ti_bandgap_update_alert_threshold(struct ti_bandgap *bgp, int id, } /* write the new threshold values */ - reg_val = thresh_val & ~tsr->threshold_thot_mask; - reg_val |= (t_hot << __ffs(tsr->threshold_thot_mask)); - reg_val |= thresh_val & ~tsr->threshold_tcold_mask; - reg_val |= (t_cold << __ffs(tsr->threshold_tcold_mask)); + reg_val = thresh_val & + ~(tsr->threshold_thot_mask | tsr->threshold_tcold_mask); + reg_val |= (t_hot << __ffs(tsr->threshold_thot_mask)) | + (t_cold << __ffs(tsr->threshold_tcold_mask)); ti_bandgap_writel(bgp, reg_val, tsr->bgap_threshold); if (err) {