Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753645AbcKHF1w (ORCPT ); Tue, 8 Nov 2016 00:27:52 -0500 Received: from mail-pf0-f195.google.com ([209.85.192.195]:33628 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753614AbcKHF1u (ORCPT ); Tue, 8 Nov 2016 00:27:50 -0500 From: Eduardo Valentin To: Rui Zhang Cc: LKML , Linux PM , Eduardo Valentin Subject: [PATCHv2 13/49] thermal: core: create tz->device.groups dynamically Date: Mon, 7 Nov 2016 21:08:51 -0800 Message-Id: <1478581767-7009-14-git-send-email-edubezval@gmail.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1478581767-7009-1-git-send-email-edubezval@gmail.com> References: <1478581767-7009-1-git-send-email-edubezval@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2382 Lines: 72 This is a patch to allow adding groups created dynamically. For now we create only the existing group. However, this is a preparation to allow creating trip groups, which are determined only when the number of trips are known at runtime. Cc: Zhang Rui Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Eduardo Valentin --- drivers/thermal/thermal_core.c | 25 ++++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index e399ae6..971f033 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1236,7 +1236,7 @@ static const struct attribute_group *thermal_zone_attribute_groups[] = { &thermal_zone_attribute_group, &thermal_zone_mode_attribute_group, &thermal_zone_passive_attribute_group, - NULL + /* This is not NULL terminated as we create the group dynamically */ }; /** @@ -1347,6 +1347,25 @@ static void remove_trip_attrs(struct thermal_zone_device *tz) kfree(tz->trip_hyst_attrs); } +static int thermal_zone_create_device_groups(struct thermal_zone_device *tz) +{ + const struct attribute_group **groups; + int i, size; + + size = ARRAY_SIZE(thermal_zone_attribute_groups) + 1; + /* This also takes care of API requirement to be NULL terminated */ + groups = kcalloc(size, sizeof(*groups), GFP_KERNEL); + if (!groups) + return -ENOMEM; + + for (i = 0; i < size - 1; i++) + groups[i] = thermal_zone_attribute_groups[i]; + + tz->device.groups = groups; + + return 0; +} + /* sys I/F for cooling device */ #define to_cooling_device(_dev) \ container_of(_dev, struct thermal_cooling_device, device) @@ -1982,7 +2001,7 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type, tz->polling_delay = polling_delay; /* Add nodes that are always present via .groups */ - tz->device.groups = thermal_zone_attribute_groups; + thermal_zone_create_device_groups(tz); /* A new thermal zone needs to be updated anyway. */ atomic_set(&tz->need_update, 1); @@ -2111,7 +2130,7 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) idr_destroy(&tz->idr); mutex_destroy(&tz->lock); device_unregister(&tz->device); - return; + kfree(tz->device.groups); } EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); -- 2.1.4