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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Alexander Usyskin <alexander.usyskin@intel.com>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>,
	Richard Weinberger <richard@nod.at>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
	Reuven Abliyev <reuven.abliyev@intel.com>,
	Lucas De Marchi <lucas.demarchi@intel.com>
Subject: Re: [PATCH] mtd: intel-dg: wake card on operations
Date: Mon, 20 Oct 2025 13:10:06 +0300	[thread overview]
Message-ID: <aPYKfhTDF5kXulz9@ashevche-desk.local> (raw)
In-Reply-To: <aPYKRvCenwnrFXcb@ashevche-desk.local>

On Mon, Oct 20, 2025 at 01:09:10PM +0300, Andy Shevchenko wrote:
> On Sun, Oct 19, 2025 at 06:01:45PM +0300, Alexander Usyskin wrote:
> > Enable runtime PM in mtd driver to notify parent graphics driver
> > that whole card should be kept awake while nvm operations are
> > performed through this driver.

Ah, and perhaps a bit elaboration why graphics card needs that?

...

> > +	pm_runtime_mark_last_busy(nvm->dev);
> > +	pm_runtime_put_autosuspend(nvm->dev);
> 
> Please, drop the second (duplicate) call.

...

> > +	devm_pm_runtime_enable(device);
> 
> Please, justify why this code is good without error checking. Before doing that
> think for a moment for the cases when devm_*() might be developed in the future
> and return something interesting (if not yet).

...

> >  err:
> > +	pm_runtime_put(device);
> > +err_norpm:
> >  	kref_put(&nvm->refcnt, intel_dg_nvm_release);
> >  	return ret;
> 
> Mixing devm with non-devm usually lead to hard to catch bugs in the error paths
> / remove stages with ordering of cleaning resources up.

-- 
With Best Regards,
Andy Shevchenko



______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

WARNING: multiple messages have this Message-ID (diff)
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Alexander Usyskin <alexander.usyskin@intel.com>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>,
	Richard Weinberger <richard@nod.at>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
	Reuven Abliyev <reuven.abliyev@intel.com>,
	Lucas De Marchi <lucas.demarchi@intel.com>
Subject: Re: [PATCH] mtd: intel-dg: wake card on operations
Date: Mon, 20 Oct 2025 13:10:06 +0300	[thread overview]
Message-ID: <aPYKfhTDF5kXulz9@ashevche-desk.local> (raw)
In-Reply-To: <aPYKRvCenwnrFXcb@ashevche-desk.local>

On Mon, Oct 20, 2025 at 01:09:10PM +0300, Andy Shevchenko wrote:
> On Sun, Oct 19, 2025 at 06:01:45PM +0300, Alexander Usyskin wrote:
> > Enable runtime PM in mtd driver to notify parent graphics driver
> > that whole card should be kept awake while nvm operations are
> > performed through this driver.

Ah, and perhaps a bit elaboration why graphics card needs that?

...

> > +	pm_runtime_mark_last_busy(nvm->dev);
> > +	pm_runtime_put_autosuspend(nvm->dev);
> 
> Please, drop the second (duplicate) call.

...

> > +	devm_pm_runtime_enable(device);
> 
> Please, justify why this code is good without error checking. Before doing that
> think for a moment for the cases when devm_*() might be developed in the future
> and return something interesting (if not yet).

...

> >  err:
> > +	pm_runtime_put(device);
> > +err_norpm:
> >  	kref_put(&nvm->refcnt, intel_dg_nvm_release);
> >  	return ret;
> 
> Mixing devm with non-devm usually lead to hard to catch bugs in the error paths
> / remove stages with ordering of cleaning resources up.

-- 
With Best Regards,
Andy Shevchenko



  reply	other threads:[~2025-10-20 10:10 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-19 15:01 [PATCH] mtd: intel-dg: wake card on operations Alexander Usyskin
2025-10-19 15:01 ` Alexander Usyskin
2025-10-20 10:09 ` Andy Shevchenko
2025-10-20 10:09   ` Andy Shevchenko
2025-10-20 10:10   ` Andy Shevchenko [this message]
2025-10-20 10:10     ` Andy Shevchenko
2025-10-21 12:51     ` Usyskin, Alexander
2025-10-21 12:51       ` Usyskin, Alexander
2025-10-21 14:39       ` Andy Shevchenko
2025-10-21 14:39         ` Andy Shevchenko
2025-10-21 15:03         ` Lucas De Marchi
2025-10-21 15:03           ` Lucas De Marchi
2025-10-23 10:53           ` Usyskin, Alexander
2025-10-23 10:53             ` Usyskin, Alexander

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