[{"id":3682301,"web_url":"http://patchwork.ozlabs.org/comment/3682301/","msgid":"","list_archive_url":null,"date":"2026-04-25T16:39:16","subject":"RE: [PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with\n disable_irq_wake() on cleanup","submitter":{"id":79631,"url":"http://patchwork.ozlabs.org/api/people/79631/","name":"Biju Das","email":"biju.das.jz@bp.renesas.com"},"content":"Hi John,\n\n> -----Original Message-----\n> From: John Madieu \n> Sent: 25 April 2026 16:50\n> Subject: [PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with disable_irq_wake() on cleanup\n> \n> isl1208_setup_irq() calls enable_irq_wake() after a successful IRQ request, but the driver has no\n> remove path that balances it.\n> The driver is devm-only, so on unbind devm releases the IRQ - but enable_irq_wake() is not undone by\n> IRQ release, so the wake count for that IRQ stays incremented.\n> \n> Each rebind therefore leaks one wake reference; the leak doubles for the chip variant that has a\n> separate evdet IRQ, since\n> isl1208_setup_irq() is then called twice during probe.\n\nIs removal of RTC device possible [1]?\n\n[1]\nhttps://patchwork.ozlabs.org/project/rtc-linux/patch/20230922081208.26334-1-biju.das.jz@bp.renesas.com/#3195765\n\nCheers,\nBiju","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-rtc@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=bp.renesas.com header.i=@bp.renesas.com\n header.a=rsa-sha256 header.s=selector1 header.b=GXEoGTIt;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; 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dmarc=pass action=none\n header.from=bp.renesas.com; dkim=pass header.d=bp.renesas.com; arc=none"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed; d=bp.renesas.com;\n s=selector1;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=E5tQf5HpbpagpE78End6D/zNNWNOKpUGqwnODTkyZAM=;\n b=GXEoGTItQVqBwCbsY1XyBFt7+X2GV2OuAGeeYLByj61B00stU/eZ529/IjUntU5qJgAdO9Tmq1n4kCIW2IOs1xSXRAkOQE5yFyyNkPxVwDnfi6e56wkopHbdBtZH9LRBSV1xqqYyHMdgCMd59xCDcRtuDQha1baz7Wq3gsPf9zE=","From":"Biju Das ","To":"John Madieu ,\n\t\"alexandre.belloni@bootlin.com\" ","CC":"\"ryan@bluewatersys.com\" ,\n\t\"akpm@linux-foundation.org\" ,\n\t\"m.grzeschik@pengutronix.de\" ,\n\t\"Denis.Osterland@diehl.com\" ,\n\t\"linux-rtc@vger.kernel.org\" ,\n\t\"linux-kernel@vger.kernel.org\" ,\n\t\"john.madieu@gmail.com\" ","Subject":"RE: [PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with\n disable_irq_wake() on cleanup","Thread-Topic":"[PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with\n disable_irq_wake() on cleanup","Thread-Index":"AQHc1MttLmzg7LlcnkKheBUo3vItcLXv+ikw","Date":"Sat, 25 Apr 2026 16:39:16 +0000","Message-ID":"\n ","References":"<20260425154959.2796261-1-john.madieu.xa@bp.renesas.com>\n <20260425154959.2796261-3-john.madieu.xa@bp.renesas.com>","In-Reply-To":"<20260425154959.2796261-3-john.madieu.xa@bp.renesas.com>","Accept-Language":"en-GB, en-US","Content-Language":"en-US","X-MS-Has-Attach":"","X-MS-TNEF-Correlator":"","authentication-results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=bp.renesas.com header.i=@bp.renesas.com\n header.a=rsa-sha256 header.s=selector1 header.b=GXEoGTIt;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; 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charset=\"us-ascii\"","Content-Transfer-Encoding":"quoted-printable","Precedence":"bulk","X-Mailing-List":"linux-rtc@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","X-OriginatorOrg":"bp.renesas.com","X-MS-Exchange-CrossTenant-AuthAs":"Internal","X-MS-Exchange-CrossTenant-AuthSource":"TY3PR01MB11346.jpnprd01.prod.outlook.com","X-MS-Exchange-CrossTenant-Network-Message-Id":"\n 61d03de9-080a-4740-17e0-08dea2e9312d","X-MS-Exchange-CrossTenant-originalarrivaltime":"25 Apr 2026 16:39:16.8965\n (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":"\n bHJucYCWjjWuiBQ913+zG8QYzfLTCiUaxzbvU95weHFi7+ic7yEy4i8cUyDs4RwzPJmRDh4lkQBldVSRsimVIZ6ISqdx/q96qmB0Lq4EXOs=","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"TYCPR01MB10167"}},{"id":3682338,"web_url":"http://patchwork.ozlabs.org/comment/3682338/","msgid":"<202604251836574d655eb1@mail.local>","list_archive_url":null,"date":"2026-04-25T18:36:57","subject":"Re: [PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with\n disable_irq_wake() on cleanup","submitter":{"id":73377,"url":"http://patchwork.ozlabs.org/api/people/73377/","name":"Alexandre Belloni","email":"alexandre.belloni@bootlin.com"},"content":"On 25/04/2026 16:39:16+0000, Biju Das wrote:\n> Hi John,\n> \n> > -----Original Message-----\n> > From: John Madieu \n> > Sent: 25 April 2026 16:50\n> > Subject: [PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with disable_irq_wake() on cleanup\n> > \n> > isl1208_setup_irq() calls enable_irq_wake() after a successful IRQ request, but the driver has no\n> > remove path that balances it.\n> > The driver is devm-only, so on unbind devm releases the IRQ - but enable_irq_wake() is not undone by\n> > IRQ release, so the wake count for that IRQ stays incremented.\n> > \n> > Each rebind therefore leaks one wake reference; the leak doubles for the chip variant that has a\n> > separate evdet IRQ, since\n> > isl1208_setup_irq() is then called twice during probe.\n> \n> Is removal of RTC device possible [1]?\n> \n> [1]\n> https://patchwork.ozlabs.org/project/rtc-linux/patch/20230922081208.26334-1-biju.das.jz@bp.renesas.com/#3195765\n> \n\nI'd say yes if this is not the RTC that is backing alarmtimer or\nalarmtimer is not compiled in the kernel.","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-rtc@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=bootlin.com header.i=@bootlin.com header.a=rsa-sha256\n header.s=dkim header.b=aHMUTR9j;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; helo=tor.lore.kernel.org;\n envelope-from=linux-rtc+bounces-6424-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com\n header.b=\"aHMUTR9j\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=185.246.85.4","smtp.subspace.kernel.org;\n dmarc=pass (p=reject dis=none) header.from=bootlin.com","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=bootlin.com"],"Received":["from tor.lore.kernel.org (tor.lore.kernel.org\n [IPv6:2600:3c04:e001:36c::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g2z856WGQz1y2d\n\tfor ; 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a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim;\n\tt=1777142219; h=from:subject:date:message-id:to:cc:mime-version:content-type:\n\t in-reply-to:references; bh=ygGiL08SISsUocfLcaOaYdbsvr1yTK/YMjXbsP0CopY=;\n\tb=aHMUTR9jWOCNL9rYYDiyV2r/mSuiSjYjgYsp0P5fb1BPlId6+zQ1d6jbTZpT7pFZl9iU3D\n\tTPZ/fmSWiidJ/SjLwuu0achtf1YSIF1t9TPw2/taC2LmZTU3O2DzW0FRc6O6c5mg5tAyla\n\tiKq/azt1ceedjdQNjGoCw1deZ6kb4QRjv3e+nEtunOsFPhOm9OjBlbu5Up6equVad4BM4m\n\th0XHuq4hoWWkxlH/kRuUZX0mrLJ+Rcepn42oeSurFKC2GlDtmXgRZx74E2dyfAIV3oyRom\n\toDF4KipR3dfC5EWekaZ/8aWU6JJd5rHsa5HEQWZRDS+sxEZMhfeWCjK0gZ11cA==","Date":"Sat, 25 Apr 2026 20:36:57 +0200","From":"Alexandre Belloni ","To":"Biju Das ","Cc":"John Madieu ,\n\t\"ryan@bluewatersys.com\" ,\n\t\"akpm@linux-foundation.org\" ,\n\t\"m.grzeschik@pengutronix.de\" ,\n\t\"Denis.Osterland@diehl.com\" ,\n\t\"linux-rtc@vger.kernel.org\" ,\n\t\"linux-kernel@vger.kernel.org\" ,\n\t\"john.madieu@gmail.com\" ","Subject":"Re: [PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with\n disable_irq_wake() on cleanup","Message-ID":"<202604251836574d655eb1@mail.local>","References":"<20260425154959.2796261-1-john.madieu.xa@bp.renesas.com>\n <20260425154959.2796261-3-john.madieu.xa@bp.renesas.com>\n ","Precedence":"bulk","X-Mailing-List":"linux-rtc@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"\n ","X-Last-TLS-Session-Version":"TLSv1.3"}},{"id":3682428,"web_url":"http://patchwork.ozlabs.org/comment/3682428/","msgid":"","list_archive_url":null,"date":"2026-04-26T18:23:32","subject":"RE: [PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with\n disable_irq_wake() on cleanup","submitter":{"id":89876,"url":"http://patchwork.ozlabs.org/api/people/89876/","name":"John Madieu","email":"john.madieu.xa@bp.renesas.com"},"content":"Hi Biju, Alexandre,\n\nThanks for the feedback.\n\n> -----Original Message-----\n> From: Alexandre Belloni \n> Sent: Samstag, 25. April 2026 20:37\n> To: Biju Das \n> Subject: Re: [PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with\n> disable_irq_wake() on cleanup\n> \n> On 25/04/2026 16:39:16+0000, Biju Das wrote:\n> > Hi John,\n> >\n> > > -----Original Message-----\n> > > From: John Madieu \n> > > Sent: 25 April 2026 16:50\n> > > Subject: [PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with\n> > > disable_irq_wake() on cleanup\n> > >\n> > > isl1208_setup_irq() calls enable_irq_wake() after a successful IRQ\n> > > request, but the driver has no remove path that balances it.\n> > > The driver is devm-only, so on unbind devm releases the IRQ - but\n> > > enable_irq_wake() is not undone by IRQ release, so the wake count for\n> that IRQ stays incremented.\n> > >\n> > > Each rebind therefore leaks one wake reference; the leak doubles for\n> > > the chip variant that has a separate evdet IRQ, since\n> > > isl1208_setup_irq() is then called twice during probe.\n> >\n> > Is removal of RTC device possible [1]?\n> >\n\nThis patch addresses the per-IRQ wake refcount leak, which I\nthink is independent of whether alarmtimer is holding the RTC.\nFound this by code inspection while working on patch [1/2]'s\nissue.\n\n> > [1]\n> > https://patchwork.ozlabs.org/project/rtc-linux/patch/20230922081208.26\n> > 334-1-biju.das.jz@bp.renesas.com/#3195765\n> >\n> \n> I'd say yes if this is not the RTC that is backing alarmtimer or\n> alarmtimer is not compiled in the kernel.\n> \n\nThanks for the clarification. That said, looking around I noticed\nmost RTC drivers don't bother balancing enable_irq_wake() either.\n\nAlexandre, do you want this patch as-is, or would you rather I\ndrop it? I'm fine either way.\n\nRegards,\nJohn","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-rtc@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=bp.renesas.com header.i=@bp.renesas.com\n header.a=rsa-sha256 header.s=selector1 header.b=AJyl5G+6;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; helo=tor.lore.kernel.org;\n envelope-from=linux-rtc+bounces-6426-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (1024-bit key) header.d=bp.renesas.com header.i=@bp.renesas.com\n header.b=\"AJyl5G+6\"","smtp.subspace.kernel.org;\n arc=fail smtp.client-ip=52.101.228.37","smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=bp.renesas.com","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=bp.renesas.com","dkim=none (message not signed)\n header.d=none;dmarc=none action=none header.from=bp.renesas.com;"],"Received":["from tor.lore.kernel.org (tor.lore.kernel.org\n [IPv6:2600:3c04:e001:36c::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g3Zp64LM2z1xvV\n\tfor ; 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charset=\"us-ascii\"","Content-Transfer-Encoding":"quoted-printable","Precedence":"bulk","X-Mailing-List":"linux-rtc@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","X-OriginatorOrg":"bp.renesas.com","X-MS-Exchange-CrossTenant-AuthAs":"Internal","X-MS-Exchange-CrossTenant-AuthSource":"TY6PR01MB17377.jpnprd01.prod.outlook.com","X-MS-Exchange-CrossTenant-Network-Message-Id":"\n 3ee64873-b7ba-4667-b683-08dea3c0ec1e","X-MS-Exchange-CrossTenant-originalarrivaltime":"26 Apr 2026 18:23:32.3477\n (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":"\n Zw5X7v0gBhCGvUhN0ToBxK7rTys6sRFPzBiUmSk5QxSo23otylO/AgbRrtx+Q/UU5CoMNu6hEqvQDjZ/mLheQXvnVb06QUJqdr/UTjCLBZ8=","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"TY4PR01MB17555"}},{"id":3682501,"web_url":"http://patchwork.ozlabs.org/comment/3682501/","msgid":"","list_archive_url":null,"date":"2026-04-27T06:07:46","subject":"RE: [PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with\n disable_irq_wake() on cleanup","submitter":{"id":79631,"url":"http://patchwork.ozlabs.org/api/people/79631/","name":"Biju Das","email":"biju.das.jz@bp.renesas.com"},"content":"Hi Alexandre Belloni,\n\nThanks for the feedback.\n\n> -----Original Message-----\n> From: Alexandre Belloni \n> Sent: 25 April 2026 19:37\n> Subject: Re: [PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with disable_irq_wake() on cleanup\n> \n> On 25/04/2026 16:39:16+0000, Biju Das wrote:\n> > Hi John,\n> >\n> > > -----Original Message-----\n> > > From: John Madieu \n> > > Sent: 25 April 2026 16:50\n> > > Subject: [PATCH 2/2] rtc: isl1208: Balance enable_irq_wake() with\n> > > disable_irq_wake() on cleanup\n> > >\n> > > isl1208_setup_irq() calls enable_irq_wake() after a successful IRQ\n> > > request, but the driver has no remove path that balances it.\n> > > The driver is devm-only, so on unbind devm releases the IRQ - but\n> > > enable_irq_wake() is not undone by IRQ release, so the wake count for that IRQ stays incremented.\n> > >\n> > > Each rebind therefore leaks one wake reference; the leak doubles for\n> > > the chip variant that has a separate evdet IRQ, since\n> > > isl1208_setup_irq() is then called twice during probe.\n> >\n> > Is removal of RTC device possible [1]?\n> >\n> > [1]\n> > https://patchwork.ozlabs.org/project/rtc-linux/patch/20230922081208.26\n> > 334-1-biju.das.jz@bp.renesas.com/#3195765\n> >\n> \n> I'd say yes if this is not the RTC that is backing alarmtimer or alarmtimer is not compiled in the\n> kernel.\n\nobj-y += timeconv.o timecounter.o alarmtimer.o\n\nAlarm timer is always compiled.\n\nNow, On RZ/G3E SMARC EVK, only single RTC that have backing\nalarmtimer support. On this platform, it cannot wake up the device\nfrom deepsleep on RTC ALARM. But it can do timekeeping.\n\nCheers,\nBiju","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-rtc@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=bp.renesas.com header.i=@bp.renesas.com\n header.a=rsa-sha256 header.s=selector1 header.b=qMF8Jtje;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=104.64.211.4; helo=sin.lore.kernel.org;\n envelope-from=linux-rtc+bounces-6429-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (1024-bit key) header.d=bp.renesas.com header.i=@bp.renesas.com\n header.b=\"qMF8Jtje\"","smtp.subspace.kernel.org;\n arc=fail smtp.client-ip=52.101.125.43","smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=bp.renesas.com","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=bp.renesas.com","dkim=none (message not signed)\n header.d=none;dmarc=none action=none header.from=bp.renesas.com;"],"Received":["from sin.lore.kernel.org (sin.lore.kernel.org [104.64.211.4])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g3tQj3Qq0z1yHv\n\tfor ; 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