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From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
To: "Rui Miguel Silva" <rmfrfs@gmail.com>
Cc: "Jonathan Cameron" <Jonathan.Cameron@Huawei.com>,
	<linuxarm@huawei.com>, <mauro.chehab@huawei.com>,
	"Fabio Estevam" <festevam@gmail.com>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Mauro Carvalho Chehab" <mchehab@kernel.org>,
	"NXP Linux Team" <linux-imx@nxp.com>,
	"Pengutronix Kernel Team" <kernel@pengutronix.de>,
	"Philipp Zabel" <p.zabel@pengutronix.de>,
	"Sascha Hauer" <s.hauer@pengutronix.de>,
	"Shawn Guo" <shawnguo@kernel.org>,
	"Steve Longerbeam" <slongerbeam@gmail.com>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <linux-media@vger.kernel.org>,
	<linux-staging@lists.linux.dev>
Subject: Re: [PATCH 02/25] staging: media: imx7-mipi-csis: fix pm_runtime_get_sync() usage count
Date: Wed, 5 May 2021 16:23:28 +0200	[thread overview]
Message-ID: <20210505162328.1e5fff80@coco.lan> (raw)
In-Reply-To: <CB5D4B64QTP4.GBH80G3VX3B6@arch-thunder>

Em Wed, 05 May 2021 14:56:40 +0100
"Rui Miguel Silva" <rmfrfs@gmail.com> escreveu:

> Hi,
> On Wed May 5, 2021 at 12:06 PM WEST, Jonathan Cameron wrote:
> 
> > On Wed, 5 May 2021 11:41:52 +0200
> > Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:
> >  
> > > The pm_runtime_get_sync() internally increments the
> > > dev->power.usage_count without decrementing it, even on errors.
> > > Replace it by the new pm_runtime_resume_and_get(), introduced by:
> > > commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
> > > in order to properly decrement the usage counter, avoiding
> > > a potential PM usage counter leak.
> > > 
> > > Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
> > > Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>  
> >
> > Not a fix as far as I can see, just a cleanup - so perhaps not this set?  
> 
> yes, the original changelog of this patch, that I acked,  made it
> clear it was a cleanup:
> 
> "
> Commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to
> deal with usage counter")                                                                                                                                         
> added pm_runtime_resume_and_get() in order to automatically handle 
> dev->power.usage_count decrement on errors.
> 
> Use the new API, in order to cleanup the error check logic.
> "
> 
> This one above is new, but I saw Mauro is going change it.

Yes, I'll change the subject/description to the
"use pm_runtime_resume_and_get()" one on this patch, as there's
no issue to be fixed here, just a cleanup ;-)

Sorry for the mess. I did lots of rebase on ~80 patch series
over the last couple of days, based on the reviews (and my own
internal reviews)...

See, the current patchset has ~80 patches with ~30% contained
fixes. It shows that writing a balanced PM runtime code is not
so trivial ;-)

Thanks,
Mauro

WARNING: multiple messages have this Message-ID
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
To: "Rui Miguel Silva" <rmfrfs@gmail.com>
Cc: "Jonathan Cameron" <Jonathan.Cameron@Huawei.com>,
	<linuxarm@huawei.com>, <mauro.chehab@huawei.com>,
	"Fabio Estevam" <festevam@gmail.com>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Mauro Carvalho Chehab" <mchehab@kernel.org>,
	"NXP Linux Team" <linux-imx@nxp.com>,
	"Pengutronix Kernel Team" <kernel@pengutronix.de>,
	"Philipp Zabel" <p.zabel@pengutronix.de>,
	"Sascha Hauer" <s.hauer@pengutronix.de>,
	"Shawn Guo" <shawnguo@kernel.org>,
	"Steve Longerbeam" <slongerbeam@gmail.com>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <linux-media@vger.kernel.org>,
	<linux-staging@lists.linux.dev>
Subject: Re: [PATCH 02/25] staging: media: imx7-mipi-csis: fix pm_runtime_get_sync() usage count
Date: Wed, 5 May 2021 16:23:28 +0200	[thread overview]
Message-ID: <20210505162328.1e5fff80@coco.lan> (raw)
In-Reply-To: <CB5D4B64QTP4.GBH80G3VX3B6@arch-thunder>

Em Wed, 05 May 2021 14:56:40 +0100
"Rui Miguel Silva" <rmfrfs@gmail.com> escreveu:

> Hi,
> On Wed May 5, 2021 at 12:06 PM WEST, Jonathan Cameron wrote:
> 
> > On Wed, 5 May 2021 11:41:52 +0200
> > Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:
> >  
> > > The pm_runtime_get_sync() internally increments the
> > > dev->power.usage_count without decrementing it, even on errors.
> > > Replace it by the new pm_runtime_resume_and_get(), introduced by:
> > > commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
> > > in order to properly decrement the usage counter, avoiding
> > > a potential PM usage counter leak.
> > > 
> > > Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
> > > Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>  
> >
> > Not a fix as far as I can see, just a cleanup - so perhaps not this set?  
> 
> yes, the original changelog of this patch, that I acked,  made it
> clear it was a cleanup:
> 
> "
> Commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to
> deal with usage counter")                                                                                                                                         
> added pm_runtime_resume_and_get() in order to automatically handle 
> dev->power.usage_count decrement on errors.
> 
> Use the new API, in order to cleanup the error check logic.
> "
> 
> This one above is new, but I saw Mauro is going change it.

Yes, I'll change the subject/description to the
"use pm_runtime_resume_and_get()" one on this patch, as there's
no issue to be fixed here, just a cleanup ;-)

Sorry for the mess. I did lots of rebase on ~80 patch series
over the last couple of days, based on the reviews (and my own
internal reviews)...

See, the current patchset has ~80 patches with ~30% contained
fixes. It shows that writing a balanced PM runtime code is not
so trivial ;-)

Thanks,
Mauro

_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2021-05-05 14:23 UTC|newest]

Thread overview: 124+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-05  9:41 [PATCH 00/25] Fix some PM runtime issues at the media subsystem Mauro Carvalho Chehab
2021-05-05  9:41 ` Mauro Carvalho Chehab
2021-05-05  9:41 ` Mauro Carvalho Chehab
2021-05-05  9:41 ` Mauro Carvalho Chehab
2021-05-05  9:41 ` Mauro Carvalho Chehab
2021-05-05  9:41 ` [PATCH 01/25] staging: media: rkvdec: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab
2021-05-05  9:41   ` Mauro Carvalho Chehab
2021-05-05  9:41   ` Mauro Carvalho Chehab
2021-05-05 12:23   ` Jonathan Cameron
2021-05-05 12:23     ` Jonathan Cameron
2021-05-05  9:41 ` [PATCH 02/25] staging: media: imx7-mipi-csis: " Mauro Carvalho Chehab
2021-05-05  9:41   ` Mauro Carvalho Chehab
2021-05-05  9:41   ` Mauro Carvalho Chehab
2021-05-05 11:06   ` Jonathan Cameron
2021-05-05 11:06     ` Jonathan Cameron
2021-05-05 11:17     ` Mauro Carvalho Chehab
2021-05-05 11:17       ` Mauro Carvalho Chehab
2021-05-05 13:56     ` Rui Miguel Silva
2021-05-05 13:56       ` Rui Miguel Silva
2021-05-05 14:23       ` Mauro Carvalho Chehab [this message]
2021-05-05 14:23         ` Mauro Carvalho Chehab
2021-05-05  9:41 ` [PATCH 03/25] media: venus: Rework error fail recover logic Mauro Carvalho Chehab
2021-05-05 11:05   ` Jonathan Cameron
2021-05-05  9:41 ` [PATCH 04/25] media: s5p_cec: decrement usage count if disabled Mauro Carvalho Chehab
2021-05-05 12:24   ` Jonathan Cameron
2021-05-05  9:41 ` [PATCH 05/25] media: i2c: ccs-core: return the right error code at suspend Mauro Carvalho Chehab
2021-05-05 12:24   ` Jonathan Cameron
2021-05-05 12:51   ` Sakari Ailus
2021-05-05  9:41 ` [PATCH 06/25] media: i2c: imx334: fix the pm runtime get logic Mauro Carvalho Chehab
2021-05-05 11:10   ` Jonathan Cameron
2021-05-05 11:24     ` Mauro Carvalho Chehab
2021-05-05 12:26       ` Jonathan Cameron
2021-05-05  9:41 ` [PATCH 07/25] media: exynos-gsc: don't resume at remove time Mauro Carvalho Chehab
2021-05-05  9:41   ` Mauro Carvalho Chehab
2021-05-05 12:27   ` Jonathan Cameron
2021-05-05 12:27     ` Jonathan Cameron
2021-05-05  9:41 ` [PATCH 08/25] media: atmel: properly get pm_runtime Mauro Carvalho Chehab
2021-05-05  9:41   ` Mauro Carvalho Chehab
2021-05-05 12:08   ` Jonathan Cameron
2021-05-05 12:08     ` Jonathan Cameron
2021-06-10  9:04     ` Eugen.Hristev
2021-06-10  9:04       ` Eugen.Hristev
2021-06-10  9:38       ` Mauro Carvalho Chehab
2021-06-10  9:38         ` Mauro Carvalho Chehab
2021-06-10 12:00         ` Eugen.Hristev
2021-06-10 12:00           ` Eugen.Hristev
2021-06-16  8:03           ` Mauro Carvalho Chehab
2021-06-16  8:03             ` Mauro Carvalho Chehab
2021-09-06  8:03           ` Mauro Carvalho Chehab
2021-09-06  8:03             ` Mauro Carvalho Chehab
2021-09-06  8:13             ` Eugen.Hristev
2021-09-06  8:13               ` Eugen.Hristev
2021-09-13 10:26               ` Eugen.Hristev
2021-09-13 10:26                 ` Eugen.Hristev
2021-05-05  9:41 ` [PATCH 09/25] media: hantro: do a PM resume earlier Mauro Carvalho Chehab
2021-05-05  9:41   ` Mauro Carvalho Chehab
2021-05-05  9:41   ` Mauro Carvalho Chehab
2021-05-05 11:34   ` Jonathan Cameron
2021-05-05 11:34     ` Jonathan Cameron
2021-05-05 13:22   ` Ezequiel Garcia
2021-05-05 13:22     ` Ezequiel Garcia
2021-05-05 13:22     ` Ezequiel Garcia
2021-05-05 13:46     ` Mauro Carvalho Chehab
2021-05-05 13:46       ` Mauro Carvalho Chehab
2021-05-05 14:01       ` Ezequiel Garcia
2021-05-05 14:01         ` Ezequiel Garcia
2021-05-05 14:01         ` Ezequiel Garcia
2021-05-05 14:15         ` Mauro Carvalho Chehab
2021-05-05 14:15           ` Mauro Carvalho Chehab
2021-05-05  9:42 ` [PATCH 10/25] media: marvel-ccic: fix some issues when getting pm_runtime Mauro Carvalho Chehab
2021-05-05  9:42 ` [PATCH 11/25] media: mdk-mdp: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab
2021-05-05  9:42   ` Mauro Carvalho Chehab
2021-05-05  9:42   ` Mauro Carvalho Chehab
2021-05-05  9:42 ` [PATCH 12/25] media: rcar_fdp1: simplify error check logic at fdp_open() Mauro Carvalho Chehab
2021-05-05  9:48   ` Sergei Shtylyov
2021-05-05  9:42 ` [PATCH 13/25] media: rcar_fdp1: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab
2021-05-05 12:31   ` Jonathan Cameron
2021-05-05  9:42 ` [PATCH 14/25] media: renesas-ceu: Properly check for PM errors Mauro Carvalho Chehab
2021-05-05  9:56   ` Jacopo Mondi
2021-05-05  9:42 ` [PATCH 15/25] media: s5p: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab
2021-05-05 12:31   ` Jonathan Cameron
2021-05-05  9:42 ` [PATCH 16/25] media: am437x: " Mauro Carvalho Chehab
2021-05-05 12:32   ` Jonathan Cameron
2021-05-08 13:01   ` Lad, Prabhakar
2021-05-05  9:42 ` [PATCH 17/25] media: sh_vou: " Mauro Carvalho Chehab
2021-05-05  9:42 ` [PATCH 18/25] media: mtk-vcodec: fix PM runtime get logic Mauro Carvalho Chehab
2021-05-05  9:42   ` Mauro Carvalho Chehab
2021-05-05  9:42   ` Mauro Carvalho Chehab
2021-05-05 12:32   ` Jonathan Cameron
2021-05-05 12:32     ` Jonathan Cameron
2021-05-05 12:32     ` Jonathan Cameron
2021-05-05  9:42 ` [PATCH 19/25] media: s5p-jpeg: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab
2021-05-05  9:42   ` Mauro Carvalho Chehab
2021-05-05 12:33   ` Jonathan Cameron
2021-05-05 12:33     ` Jonathan Cameron
2021-05-05  9:42 ` [PATCH 20/25] media: sti/delta: use pm_runtime_resume_and_get() Mauro Carvalho Chehab
2021-05-05 12:01   ` Jonathan Cameron
2021-05-05 12:33     ` Jonathan Cameron
2021-05-05  9:42 ` [PATCH 21/25] media: sunxi: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab
2021-05-05  9:42   ` Mauro Carvalho Chehab
2021-05-05  9:42   ` Mauro Carvalho Chehab
2021-05-05  9:42 ` [PATCH 22/25] media: sti/bdisp: " Mauro Carvalho Chehab
2021-05-05 12:34   ` Jonathan Cameron
2021-05-05  9:42 ` [PATCH 23/25] media: exynos4-is: " Mauro Carvalho Chehab
2021-05-05  9:42   ` Mauro Carvalho Chehab
2021-05-05 12:20   ` Jonathan Cameron
2021-05-05 12:20     ` Jonathan Cameron
2021-05-05  9:42 ` [PATCH 24/25] media: exynos-gsc: " Mauro Carvalho Chehab
2021-05-05  9:42   ` Mauro Carvalho Chehab
2021-05-05 12:34   ` Jonathan Cameron
2021-05-05 12:34     ` Jonathan Cameron
2021-05-05  9:42 ` [PATCH 25/25] media: i2c: ccs-core: " Mauro Carvalho Chehab
2021-05-05 10:34   ` Sakari Ailus
2021-05-05 10:57     ` Mauro Carvalho Chehab
2021-05-05 10:58       ` Mauro Carvalho Chehab
2021-05-05 12:35         ` Jonathan Cameron
2021-05-05 14:06           ` Mauro Carvalho Chehab
2021-05-05 16:36             ` Jonathan Cameron
2021-05-05 11:02       ` Sakari Ailus
2021-05-06 15:11 ` [PATCH 00/25] Fix some PM runtime issues at the media subsystem Mauro Carvalho Chehab
2021-05-06 15:11   ` Mauro Carvalho Chehab
2021-05-06 15:11   ` Mauro Carvalho Chehab
2021-05-06 15:11   ` Mauro Carvalho Chehab
2021-05-06 15:11   ` Mauro Carvalho Chehab

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