From: Greg KH <gregkh@linuxfoundation.org>
To: Christian.Gromm@microchip.com
Cc: driverdev-devel@linuxdriverproject.org
Subject: Re: [PATCH v4 01/10] staging: most: remove device from interface structure
Date: Fri, 14 Feb 2020 08:17:06 -0800 [thread overview]
Message-ID: <20200214161706.GA3964402@kroah.com> (raw)
In-Reply-To: <b8a77d5c7947dd4fb0f06f9938e15b1496f64cd4.camel@microchip.com>
On Thu, Feb 06, 2020 at 09:14:55AM +0000, Christian.Gromm@microchip.com wrote:
> On Fri, 2020-01-24 at 10:09 +0100, Greg KH wrote:
> > EXTERNAL EMAIL: Do not click links or open attachments unless you
> > know the content is safe
> >
> > On Fri, Jan 24, 2020 at 08:56:56AM +0000,
> > Christian.Gromm@microchip.com wrote:
> > > On Thu, 2020-01-23 at 19:18 +0100, Greg KH wrote:
> > > > EXTERNAL EMAIL: Do not click links or open attachments unless you
> > > > know the content is safe
> > > >
> > > > On Thu, Jan 23, 2020 at 04:38:17PM +0100, Christian Gromm wrote:
> > > > > This patch makes the adapter drivers use their own device
> > > > > structures
> > > > > when registering a most interface with the core module.
> > > > > With this the module that actually operates the physical device
> > > > > is
> > > > > the
> > > > > owner of the device.
> > > >
> > > > Ick, why? The interface should be part of sysfs, right, and now
> > > > it
> > > > isn't?
> > >
> > > It still is. What has changed is that the device that actually
> > > represents the attached hardware is used (see probe function of
> > > the USB adapter driver for instance).
> >
> > Ah. Ick. odd...
> >
> > > > Who handles the lifetime rules of these interfaces now? Why
> > > > remove this?
> > >
> > > The struct device that is allocated when attaching a MOST device is
> > > handling the lifetime and the struct most_interface is
> > > representing this device in the kernel. Hence, registered with
> > > sysfs.
> > >
> > > This ensures that the device is present in the kernel until its
> > > physical stature is being detached from the system.
> > > The core driver is just the man in the middle that registers the
> > > bus and itself as the driver and organizes the configfs, sysfs and
> > > communication paths to user space.
> > >
> > > >
> > > > Why isn't the interface dynamically created properly? That
> > > > should
> > > > solve
> > > > the lifetime rules here, right?
> > >
> > > The interface is dynamically allocated. This happens inside the
> > > USB, DIM2, I2C etc. drivers. The struct most_interface is part of
> > > the container struct there.
> >
> > Ok, I'll take the first 7 of these patches and see what the end
> > result
> > looks like after that, it will make reviewing the code easier...
>
> Did you find some time for the review yet?
I haven't, sorry. Can you resend the movement patch so that I can just
see it from that point?
thanks,
greg k-h
_______________________________________________
devel mailing list
devel@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
next prev parent reply other threads:[~2020-02-14 20:02 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-23 15:38 [PATCH v4 00/10] staging: most: move core module out of staging Christian Gromm
2020-01-23 15:38 ` [PATCH v4 01/10] staging: most: remove device from interface structure Christian Gromm
2020-01-23 18:18 ` Greg KH
2020-01-24 8:56 ` Christian.Gromm
2020-01-24 9:09 ` Greg KH
2020-02-06 9:14 ` Christian.Gromm
2020-02-14 16:17 ` Greg KH [this message]
2020-03-23 14:16 ` Christian.Gromm
2020-01-23 15:38 ` [PATCH v4 02/10] staging: most: core: drop device reference Christian Gromm
2020-01-23 15:38 ` [PATCH v4 03/10] staging: most: remove struct device core driver Christian Gromm
2020-01-23 15:38 ` [PATCH v4 04/10] staging: most: core: remove container struct Christian Gromm
2020-01-23 15:38 ` [PATCH v4 05/10] staging: most: core: fix logging messages Christian Gromm
2020-01-23 15:38 ` [PATCH v4 06/10] staging: next: configfs: fix release link Christian Gromm
2020-01-23 15:38 ` [PATCH v4 07/10] staging: most: usb: check for NULL device Christian Gromm
2020-01-23 15:38 ` [PATCH v4 08/10] staging: most: move core files out of the staging area Christian Gromm
2020-01-23 15:38 ` [PATCH v4 09/10] staging: most: Documentation: update ABI description Christian Gromm
2020-01-23 15:38 ` [PATCH v4 10/10] staging: most: Documentation: move ABI description files out of staging area Christian Gromm
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200214161706.GA3964402@kroah.com \
--to=gregkh@linuxfoundation.org \
--cc=Christian.Gromm@microchip.com \
--cc=driverdev-devel@linuxdriverproject.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).