From patchwork Thu Nov 29 17:46:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ulf Hansson X-Patchwork-Id: 10705017 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 05A3B18B8 for ; Thu, 29 Nov 2018 17:47:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E6B722F36A for ; Thu, 29 Nov 2018 17:47:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DA92E2F54B; Thu, 29 Nov 2018 17:47:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 788332F544 for ; Thu, 29 Nov 2018 17:47:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730753AbeK3ExW (ORCPT ); Thu, 29 Nov 2018 23:53:22 -0500 Received: from mail-lf1-f68.google.com ([209.85.167.68]:42843 "EHLO mail-lf1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730662AbeK3ExV (ORCPT ); Thu, 29 Nov 2018 23:53:21 -0500 Received: by mail-lf1-f68.google.com with SMTP id l10so2095602lfh.9 for ; Thu, 29 Nov 2018 09:47:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=2OFzyl7DYqM+TKMo2yE9Sged+x4IOY1BMaINc0irzbk=; b=WF/uDC6cto89UDdfBnGrf81NlzZ26+j7fWxzr3FcUZ6bWkeWgWVSaZuoeSFwtlCJcl ngNYcGXO/yOYk1SP4DlEzNaHgCCudJxCxzVB9V/lGel5iAWprOmMJl3y0UydtSlM96+S vrGMzuCnis/xZHu8BwGfiah6JjJ2lyvNiNMLE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=2OFzyl7DYqM+TKMo2yE9Sged+x4IOY1BMaINc0irzbk=; b=h52CtNaSLsm8XmZEUFicmHOzEQQwIQg8IdO3Pm6BTE/39I4dxJ1feu8Z3QBGgthV72 jTdPNqBfjqwqrdIjR5hq2RoWlHUtXP1QsrNaPQaiK2RUANfD/fComSulbP/TusmsQmUc VjrLfvvFzKAm4sNxzCnflmk+lLe75mkAB1TKiwxuAVRMQoeN3eWENWTsop8jG/b+2+EJ 4D7Sb8rrauEeUQhJiUKdq1b+lt//qUe/uzx2yw8RMPn/jfBYHxV+x8mjBQmzAOcQOzrG nVFJFxoXv13URuH0dkK8wNL7qvgh5gblW8NhljjCj0QlaHIjvstpVvQJVxf+9M/e37/L u7fg== X-Gm-Message-State: AA+aEWbmew+2H+JxcNw9noLBWmd2fSgQO38XicYfnTg6eLbuAR5QmumE HqS2F8vcRuz68xTNM5Bz60suPg== X-Google-Smtp-Source: AFSGD/WcONLGmNXYECO9oNRUxrjzh2zAGhw9wIqkXq80q8IdpwQYFhZTN3X/sVmIELfDUDxcx4LF2Q== X-Received: by 2002:a19:2c92:: with SMTP id s140mr1622412lfs.42.1543513630200; Thu, 29 Nov 2018 09:47:10 -0800 (PST) Received: from localhost.localdomain (h-158-174-22-210.NA.cust.bahnhof.se. [158.174.22.210]) by smtp.gmail.com with ESMTPSA id j76-v6sm393983ljb.12.2018.11.29.09.47.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 29 Nov 2018 09:47:09 -0800 (PST) From: Ulf Hansson To: "Rafael J . Wysocki" , Sudeep Holla , Lorenzo Pieralisi , Mark Rutland , Daniel Lezcano , linux-pm@vger.kernel.org Cc: "Raju P . L . S . S . S . N" , Stephen Boyd , Tony Lindgren , Kevin Hilman , Lina Iyer , Ulf Hansson , Viresh Kumar , Vincent Guittot , Geert Uytterhoeven , linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v10 01/27] PM / Domains: Add generic data pointer to genpd_power_state struct Date: Thu, 29 Nov 2018 18:46:34 +0100 Message-Id: <20181129174700.16585-2-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181129174700.16585-1-ulf.hansson@linaro.org> References: <20181129174700.16585-1-ulf.hansson@linaro.org> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Let's add a data pointer to the genpd_power_state struct, to allow a genpd backend driver to store per state specific data. In order to introduce the pointer, we also need to adopt how genpd frees the allocated data for the default genpd_power_state struct, that it may allocate at pm_genpd_init(). More precisely, let's use an internal genpd flag to understand when the states needs to be freed by genpd. When freeing the states data in genpd_remove(), let's also clear the corresponding genpd->states pointer and reset the genpd->state_count. In this way, a genpd backend driver becomes aware of when there is state specific data for it to free. Cc: Lina Iyer Co-developed-by: Lina Iyer Signed-off-by: Ulf Hansson --- Changes in v10: - Update the patch allow backend drivers to free the states specific data during genpd removal. Due to this added complexity, I decided to keep the patch separate, rather than fold it into the patch that makes use of the new void pointer, which was suggested by Rafael. - Claim authorship of the patch as lots of changes has been done since the original pick up from Lina Iyer. --- drivers/base/power/domain.c | 8 ++++++-- include/linux/pm_domain.h | 3 ++- 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 7f38a92b444a..e27b91d36a2a 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -1620,7 +1620,7 @@ static int genpd_set_default_power_state(struct generic_pm_domain *genpd) genpd->states = state; genpd->state_count = 1; - genpd->free = state; + genpd->free_state = true; return 0; } @@ -1736,7 +1736,11 @@ static int genpd_remove(struct generic_pm_domain *genpd) list_del(&genpd->gpd_list_node); genpd_unlock(genpd); cancel_work_sync(&genpd->power_off_work); - kfree(genpd->free); + if (genpd->free_state) { + kfree(genpd->states); + genpd->states = NULL; + genpd->state_count = 0; + } pr_debug("%s: removed %s\n", __func__, genpd->name); return 0; diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 3b5d7280e52e..f9e09bd4152c 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -69,6 +69,7 @@ struct genpd_power_state { s64 residency_ns; struct fwnode_handle *fwnode; ktime_t idle_time; + void *data; }; struct genpd_lock_ops; @@ -110,7 +111,7 @@ struct generic_pm_domain { struct genpd_power_state *states; unsigned int state_count; /* number of states */ unsigned int state_idx; /* state that genpd will go to when off */ - void *free; /* Free the state that was allocated for default */ + bool free_state; /* Free the state that was allocated for default */ ktime_t on_time; ktime_t accounting_time; const struct genpd_lock_ops *lock_ops;