linux-kernel - Re: [PATCH] platform/x86/amd/hsmp: switch to use device_add

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Date: Thu, 1 Feb 2024 06:22:13 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: "Hegde, Suma" <Suma.Hegde@....com>
Cc: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	naveenkrishna.chatradhi@....com,
	LKML <linux-kernel@...r.kernel.org>,
	Carlos Bilbao <carlos.bilbao@....com>,
	Hans de Goede <hdegoede@...hat.com>,
	platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH] platform/x86/amd/hsmp: switch to use device_add_groups()

On Thu, Feb 01, 2024 at 06:50:33PM +0530, Hegde, Suma wrote:
> On 1/29/2024 6:16 PM, Ilpo Järvinen wrote:
> > Caution: This message originated from an External Source. Use proper caution when opening attachments, clicking links, or responding.
> > 
> > 
> > + Cc Suma Hegde.
> > 
> > On Sun, 28 Jan 2024, Greg Kroah-Hartman wrote:
> > 
> > > The use of devm_*() functions works properly for when the device
> > > structure itself is dynamic, but the hsmp driver is attempting to have a
> > > local, static, struct device and then calls devm_() functions attaching
> > > memory to the device that will never be freed.
> > > 
> > > The logic of having a static struct device is almost never a wise
> > > choice, but for now, just remove the use of devm_device_add_groups() in
> > > this driver as it obviously is not needed.
> 
> Hi Greg,
> 
> Could you please hold on merging this patch for a week? I will push a patch
> for converting platform specific structure's memory allocation from static
> to a dynamic
> 
> allocation.

Push it where?  Ususally we do "first patch wins" type stuff, why not
just do your work on top of mine?

Also, when you do make the needed changes, please remove the explicit
call to create sysfs groups and use the default groups pointer instead,
that will make things much simpler and avoid races in the code.

thanks,

greg k-h