From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752214AbcGBCtS (ORCPT ); Fri, 1 Jul 2016 22:49:18 -0400 Received: from mail-pf0-f195.google.com ([209.85.192.195]:35973 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751426AbcGBCtP (ORCPT ); Fri, 1 Jul 2016 22:49:15 -0400 From: Eduardo Valentin To: Rui Zhang Cc: Eduardo Valentin , "Rafael J. Wysocki" , Len Brown , linux-acpi@vger.kernel.org, "Lee, Chun-Yi" , Darren Hart , Keerthy , linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCHv2 1/1] thermal: sysfs: lock tz while on access to mode properties Date: Fri, 1 Jul 2016 19:49:09 -0700 Message-Id: <1467427749-31379-1-git-send-email-edubezval@gmail.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1464676296-5610-3-git-send-email-edubezval@gmail.com> References: <1464676296-5610-3-git-send-email-edubezval@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Serialized calls to tz.ops in user facing sysfs handler mode_show() and mode_store(). Because several drivers do the following pattern: .set_mode() ... local_data->mode = new_mode; thermal_zone_device_update(tz); makes sense to simply do the thermal_zone_device_update() in thermal core, after setting the new mode. as .set_mode() is now called always with tz->lock held. Cc: "Rafael J. Wysocki" Cc: Len Brown Cc: linux-acpi@vger.kernel.org Cc: "Lee, Chun-Yi" Cc: Darren Hart Cc: Zhang Rui Cc: Keerthy Cc: linux-kernel@vger.kernel.org Cc: linux-omap@vger.kernel.org Cc: platform-driver-x86@vger.kernel.org Cc: linux-pm@vger.kernel.org Signed-off-by: Eduardo Valentin --- drivers/acpi/thermal.c | 1 - drivers/platform/x86/acerhdf.c | 1 - drivers/thermal/imx_thermal.c | 1 - drivers/thermal/of-thermal.c | 5 ----- drivers/thermal/thermal_sysfs.c | 14 +++++++++++--- drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 5 ----- 6 files changed, 11 insertions(+), 16 deletions(-) diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 82707f9..03c3460 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -581,7 +581,6 @@ static int thermal_set_mode(struct thermal_zone_device *thermal, ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s kernel ACPI thermal control\n", tz->tz_enabled ? "Enable" : "Disable")); - acpi_thermal_check(tz); } return 0; } diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c index 460fa67..aee33ba 100644 --- a/drivers/platform/x86/acerhdf.c +++ b/drivers/platform/x86/acerhdf.c @@ -405,7 +405,6 @@ static inline void acerhdf_enable_kernelmode(void) kernelmode = 1; thz_dev->polling_delay = interval*1000; - thermal_zone_device_update(thz_dev); pr_notice("kernel mode fan control ON\n"); } diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c index c5547bd..a413eb6 100644 --- a/drivers/thermal/imx_thermal.c +++ b/drivers/thermal/imx_thermal.c @@ -246,7 +246,6 @@ static int imx_set_mode(struct thermal_zone_device *tz, } data->mode = mode; - thermal_zone_device_update(tz); return 0; } diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c index b8e509c..95c47da 100644 --- a/drivers/thermal/of-thermal.c +++ b/drivers/thermal/of-thermal.c @@ -282,17 +282,12 @@ static int of_thermal_set_mode(struct thermal_zone_device *tz, { struct __thermal_zone *data = tz->devdata; - mutex_lock(&tz->lock); - if (mode == THERMAL_DEVICE_ENABLED) tz->polling_delay = data->polling_delay; else tz->polling_delay = 0; - mutex_unlock(&tz->lock); - data->mode = mode; - thermal_zone_device_update(tz); return 0; } diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c index ee983ca..1e223d4 100644 --- a/drivers/thermal/thermal_sysfs.c +++ b/drivers/thermal/thermal_sysfs.c @@ -62,7 +62,9 @@ mode_show(struct device *dev, struct device_attribute *attr, char *buf) if (!tz->ops->get_mode) return -EPERM; + mutex_lock(&tz->lock); result = tz->ops->get_mode(tz, &mode); + mutex_unlock(&tz->lock); if (result) return result; @@ -75,17 +77,23 @@ mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct thermal_zone_device *tz = to_thermal_zone(dev); + enum thermal_device_mode mode = THERMAL_DEVICE_DISABLED; int result; if (!tz->ops->set_mode) return -EPERM; if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) - result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); + mode = THERMAL_DEVICE_ENABLED; else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) - result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); + mode = THERMAL_DEVICE_DISABLED; else - result = -EINVAL; + return -EINVAL; + + mutex_lock(&tz->lock); + result = tz->ops->set_mode(tz, mode); + mutex_unlock(&tz->lock); + thermal_zone_device_update(tz); if (result) return result; diff --git a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c index 15c0a9a..5dce053 100644 --- a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c +++ b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c @@ -193,19 +193,14 @@ static int ti_thermal_set_mode(struct thermal_zone_device *thermal, return 0; } - mutex_lock(&data->ti_thermal->lock); - if (mode == THERMAL_DEVICE_ENABLED) data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE; else data->ti_thermal->polling_delay = 0; - mutex_unlock(&data->ti_thermal->lock); - data->mode = mode; ti_bandgap_write_update_interval(bgp, data->sensor_id, data->ti_thermal->polling_delay); - thermal_zone_device_update(data->ti_thermal); dev_dbg(&thermal->device, "thermal polling set for duration=%d msec\n", data->ti_thermal->polling_delay); -- 2.1.4