Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.32 as permitted sender) client-ip=23.128.96.32;
From:   Biju Das <biju.das.jz@bp.renesas.com>
To:     Thomas Gleixner <tglx@linutronix.de>,
        John Stultz <jstultz@google.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>
CC:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        John Stultz <jstultz@google.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Stephen Boyd <sboyd@kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Biju Das <biju.das.au@gmail.com>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        "linux-rtc@vger.kernel.org" <linux-rtc@vger.kernel.org>,
        "linux-renesas-soc@vger.kernel.org" 
        <linux-renesas-soc@vger.kernel.org>,
        Trent Piepho <tpiepho@gmail.com>
Subject: [Query]: Resource cleanup for Alarmtimer
Thread-Topic: [Query]: Resource cleanup for Alarmtimer
Thread-Index: AdnrmFAjUih7l1QlSdSObu7MvB/BAQ==
Date:   Wed, 20 Sep 2023 08:12:10 +0000
Message-ID: <OS0PR01MB5922DD412F43E1C836E32AF486F9A@OS0PR01MB5922.jpnprd01.prod.outlook.com>
Accept-Language: en-GB, en-US
Content-Language: en-US
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?us-ascii?Q?0qAuBHCGHAvbWguVYRFQVGk+glbOQU7ht41FxLOTsyEbut7BxbWnhCPKUKXT?=
 =?us-ascii?Q?ub8tp0U77ErzZuWMJhpwde/D2gb2P6ubfbbC2jeQqAmM748NzgXSDyJEu22r?=
 =?us-ascii?Q?sbZ3cZTJrLCe4ew1Vh086dovHX1SE9PNjEUUG2PIKOVanyHA586zisYZUBxC?=
 =?us-ascii?Q?6n2XpKZqB2F/6/Tn5sIuM93pEGLqRSAgQFlooUDoFe69rZVRGBvg3C+Jbho+?=
 =?us-ascii?Q?HwQcCY1tNKL9Vhf3FfoOPyC9U9kAH0eO0STjDqe8beD50+5Rwi3jclOAKb3N?=
 =?us-ascii?Q?jhInv2An+KhPJcRZf5CuSVBpSg1utw7sb0YzqizId7R8A/H9DtlMW9aBa7gI?=
 =?us-ascii?Q?k0rZo0BBAkAuC8FdxAUuhWszP2bpY+TrZ3E+xWlaFa73Sk+tmMD/f8UAVNhc?=
 =?us-ascii?Q?Jmoc3cMmAJmHbca9P9nJP1pGgkEWqkq9JuXQ+1l0o2xoF6OvdgeQ8AcB4Dti?=
 =?us-ascii?Q?JP9hScq32ZGZZXuPMTsVVYzP2lw9VmAeyXuM7c6Ctl/Rbdh3NXpl/yGYDUVa?=
 =?us-ascii?Q?FDK4I89qH+CYUZsBg1HmnYL8dTcQL/4ez5c7METnCy04pl4jCVhPZfIC08E5?=
 =?us-ascii?Q?mM7YSD10z84l5C1MPu3TTEukDkb810ewYQ0D6BlgaVMOlpiWqenHn0eckqhR?=
 =?us-ascii?Q?I1GwAQLy+yM/rq+oBkWT3nw+pigtRuc/Nq9GIF+ML8vMkRhV6XjYhvYcBALc?=
 =?us-ascii?Q?uG0OIcPlXXSwMs54TgzELWqlYHQr9ZPOljz2Kjv22wCp739nlvd7oAyGIicA?=
 =?us-ascii?Q?lE1MMKjV12JI9u2zgC8WbIQ6PA50p3TXmwr5uT6rF0wtHq8R4WdDAiC/z+oM?=
 =?us-ascii?Q?IvI/76mOhG+Ap4od+fC5BNYjnU+eyVb9u9JGtfsT3ZDby5tXF0AI9FSG40uB?=
 =?us-ascii?Q?QdRWUsnWlTtDWjC8KEOmp+rI6pnmCFLjurw0bH9MiSy/VVYCHGU0zFH/mf+H?=
 =?us-ascii?Q?67cSQhTBqSS2Thwy8BCdqdfu9qgNr0YoTXe1I05fanemLeoyoBtvNO2cHBN9?=
 =?us-ascii?Q?SFGodol2ClwcP5nGAtP0g8u+CQKFyCDQ5sFuV5JR0188jAarDwa0OgJF2SV/?=
 =?us-ascii?Q?5mp5XtNvq9fKiXaa/e4Bh0OfBaY5bgSSE4mhK3AYidLrQkFJS3PJfDk9Udid?=
 =?us-ascii?Q?b0+j7mN2mngz6kxSJYxCFfdib99JDTu9Dy7NVuihPvApQIxKWctny193Rpug?=
 =?us-ascii?Q?mJ7W3yFEE4W4k6rD1YluiIjJSJ134P9SjtRB/ibtoa2NqJnIBE6Df1/j9lYr?=
 =?us-ascii?Q?WnL/+1/oJ9hEy/wm7A45mkHUOH626Urw94jN/WOjqKbb6iSj0qLTJlOMMms5?=
 =?us-ascii?Q?G3ezKJonRlMiRmOqbNpr8vdpKIk11Skgs3hV1VP84fgTe5sC3WjlIVAeXMtU?=
 =?us-ascii?Q?JYfjZTD1gtcMDT4HCyxZOod6f6scjA5gzS9V+6JLKU3RllzNJo1r0hut+P9i?=
 =?us-ascii?Q?5NmN1w/I07VdLeVJLv3nlVskekGZNE1+AV5PBVyXC/GeMwNmflTujmUsa/Ut?=
 =?us-ascii?Q?+Ey8crNoLDzDLbKipv4FWHqMffpEiLz4AxgFteLq9qBHn7RB1aahjTFiSP/4?=
 =?us-ascii?Q?f/HB2f/wSSwF3rnxSlcetdIvwBpU9PIO0n6drntyWWFnmfSZGNqqhr11XGa8?=
 =?us-ascii?Q?3Q=3D=3D?=
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-OriginatorOrg: bp.renesas.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: OS0PR01MB5922.jpnprd01.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: c1465bd9-5f54-4226-7126-08dbb9b149e4
X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Sep 2023 08:12:10.3068
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 53d82571-da19-47e4-9cb4-625a166a4a2a
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: m6TYDM0RhEUOXa2Fpf3J+GNg+WSCgXECUlWesBW57h7JtJZ7OKtp6zpH9jj4zqnsS4SLxBsVsyqRFxM90KtVgRzB7tdb1GEsGi2GaszHjrg=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: TYCPR01MB5999
X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID,
	DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,
	SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no
	version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on agentk.vger.email
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (agentk.vger.email [0.0.0.0]); Wed, 20 Sep 2023 01:12:21 -0700 (PDT)

Hi All,

Currently unbind/bind is not working as expected on rtc-isl1208 driver. The=
 reason is put_device() is not calling rtc_device_release()
as some of the kobjects are not freed during unbind.

The commit 	c79108bd19a8 "alarmtimer: Make alarmtimer platform device child=
 of RTC device" adds kobjects for alarmtimer device/sysfs, when we call dev=
ice_init_wakeup() followed by devm_rtc_register_device()from the end point =
driver during probe().
But these kobjects are never freed when we do unbind on the endpoint driver=
.

The alarm timer device has alarmtimer_rtc_add_device() but it does not have=
 remove_device() callbacks to free kbjects.

Q1) Has anyone tested unbind/rebind on RTC subsystem with device_init_wakeu=
p() followed by devm_rtc_register_device() in
the probe?

Cheers,
Biju