From: Johan Hovold <johan@kernel.org>
To: Mark Brown <broonie@kernel.org>
Cc: Johan Hovold <johan@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
linux-gpio@vger.kernel.org,
Alexandre Courbot <acourbot@nvidia.com>,
Arnd Bergmann <arnd@arndb.de>,
Michael Welling <mwelling@ieee.org>,
Markus Pargmann <mpa@pengutronix.de>,
Amit Kucheria <amit.kucheria@linaro.org>
Subject: Re: [PATCH 1/6] gpio: make the gpiochip a real device
Date: Mon, 2 Nov 2015 14:25:26 +0100 [thread overview]
Message-ID: <20151102132526.GB12752@localhost> (raw)
In-Reply-To: <20151102131701.GI20228@sirena.org.uk>
On Mon, Nov 02, 2015 at 01:17:01PM +0000, Mark Brown wrote:
> On Mon, Nov 02, 2015 at 02:14:56PM +0100, Johan Hovold wrote:
> > On Mon, Nov 02, 2015 at 01:06:33PM +0000, Mark Brown wrote:
>
> > > > Dynamically allocated struct device are not the problem as then you're
> > > > not *reusing* the same device structure.
>
> > > You may end up doing exactly that depending on what you get back from
> > > the allocator of course.
>
> > But then the memory has already been released. You're not deregistering
> > and reregistering the same device as in your example.
>
> Depends on your definition of "same" :) You might get the same address
> back which has been known to confuse unhelpfully designed things.
Yeah, I got your point, but again my claim was that
device_unregister(dev);
memset(dev);
device_initialise(dev);
...
device_add(dev);
is not legal (and the current patch does not prevent this).
Johan
next prev parent reply other threads:[~2015-11-02 13:25 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-22 8:32 [PATCH 0/6] GPIO character device skeleton Linus Walleij
2015-10-22 8:32 ` [PATCH 1/6] gpio: make the gpiochip a real device Linus Walleij
2015-10-24 18:09 ` Markus Pargmann
2015-10-25 7:06 ` Alexandre Courbot
2015-10-26 2:12 ` Mark Brown
2015-11-03 21:20 ` Linus Walleij
2015-11-02 10:31 ` Johan Hovold
2015-11-02 12:25 ` Mark Brown
2015-11-02 12:43 ` Johan Hovold
2015-11-02 12:47 ` Mark Brown
2015-11-02 12:53 ` Johan Hovold
2015-11-02 13:06 ` Mark Brown
2015-11-02 13:14 ` Johan Hovold
2015-11-02 13:17 ` Mark Brown
2015-11-02 13:25 ` Johan Hovold [this message]
2015-11-03 21:24 ` Linus Walleij
2015-11-04 10:48 ` Linus Walleij
2015-11-05 9:44 ` Johan Hovold
2015-11-05 10:29 ` Mark Brown
2015-11-16 14:27 ` Linus Walleij
2015-12-03 14:04 ` Linus Walleij
2015-12-03 14:06 ` Linus Walleij
2015-12-03 21:26 ` Michael Welling
2015-12-04 22:31 ` Michael Welling
2015-12-11 17:58 ` Linus Walleij
2015-12-08 9:29 ` Johan Hovold
2015-12-11 18:06 ` Linus Walleij
2015-10-22 8:32 ` [PATCH 2/6] gpio: refer to gpio device in prints and debugfs Linus Walleij
2015-10-22 8:32 ` [PATCH 3/6] gpio: add a userspace chardev ABI for GPIOs Linus Walleij
2015-10-22 20:35 ` Michael Welling
2015-10-24 0:30 ` Greg Kroah-Hartman
2016-01-28 11:13 ` Linus Walleij
2015-10-26 1:34 ` Mark Brown
2016-01-27 10:05 ` Bamvor Zhang Jian
2016-01-28 11:14 ` Linus Walleij
2016-01-29 10:24 ` Bamvor Zhang Jian
2016-02-10 10:04 ` Linus Walleij
2015-10-22 8:32 ` [PATCH 4/6] tools/gpio: create GPIO tools Linus Walleij
2015-10-25 8:23 ` Alexandre Courbot
2015-10-22 8:32 ` [PATCH 5/6] gpio: add a userspace character device ABI Linus Walleij
2015-10-24 18:46 ` Markus Pargmann
2015-10-22 8:32 ` [PATCH 6/6] gpio: ABI: mark the sysfs ABI as obsolete Linus Walleij
2015-10-22 18:57 ` [PATCH 0/6] GPIO character device skeleton Michael Welling
2015-10-24 17:53 ` Markus Pargmann
2015-10-30 14:40 ` Linus Walleij
2015-11-02 10:00 ` Johan Hovold
2015-10-24 18:42 ` Markus Pargmann
2015-10-30 1:55 ` Alexandre Courbot
2015-10-30 19:48 ` Linus Walleij
2015-11-02 10:13 ` Johan Hovold
2015-11-03 7:23 ` Markus Pargmann
2015-11-03 12:06 ` Johan Hovold
2015-11-03 17:18 ` Linus Walleij
2015-11-04 19:44 ` Michael Welling
2015-11-05 9:40 ` Johan Hovold
2015-11-05 14:11 ` Linus Walleij
2015-11-06 10:21 ` Johan Hovold
2015-11-16 13:33 ` Linus Walleij
2015-11-03 17:05 ` Linus Walleij
2015-10-30 14:43 ` Linus Walleij
2015-10-30 22:54 ` Arnd Bergmann
2015-11-01 9:37 ` Linus Walleij
2015-11-02 10:16 ` Johan Hovold
2015-10-26 2:18 ` Mark Brown
2015-10-30 1:55 ` Alexandre Courbot
2015-10-30 19:47 ` Linus Walleij
2015-11-01 2:41 ` Mark Brown
2015-11-03 7:39 ` Markus Pargmann
2015-11-03 8:50 ` Mark Brown
2015-11-03 10:21 ` Amit Kucheria
2015-11-03 17:06 ` Linus Walleij
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