From: "Vaittinen, Matti" <Matti.Vaittinen@fi.rohmeurope.com>
To: "michael@walle.cc" <michael@walle.cc>, "bjorn@mork.no" <bjorn@mork.no>
Cc: linux-power <linux-power@fi.rohmeurope.com>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
"bgolaszewski@baylibre.com" <bgolaszewski@baylibre.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linus.walleij@linaro.org" <linus.walleij@linaro.org>
Subject: Re: [PATCH v2 2/3] gpio: gpio-regmap: Use devm_add_action()
Date: Fri, 21 May 2021 10:30:18 +0000 [thread overview]
Message-ID: <d6bb1e458d5aa6a32f31f7731e1a6097a225d634.camel@fi.rohmeurope.com> (raw)
In-Reply-To: <87a6ooh46s.fsf@miraculix.mork.no>
On Fri, 2021-05-21 at 10:38 +0200, Bjørn Mork wrote:
> Michael Walle <michael@walle.cc> writes:
>
> > Am 2021-05-21 08:28, schrieb Matti Vaittinen:
> > > Slightly simplify the devm_gpio_regmap_register() by using the
> > > devm_add_action().
> >
> > Hm, nice, but what bothers me a bit is that no other subsystem
> > does it that way, eg. hwmon/hwmon.c or watchdog/watchdog_core.c.
> > They also store just one pointer, thus could be simplified in the
> > same way. What I don't know is if devm_add_action() was intended
> > to be used this way. So I can't say much for this patch ;)
>
> There are some examples. Like:
>
> int devm_i2c_add_adapter(struct device *dev, struct i2c_adapter
> *adapter)
> {
> int ret;
>
> ret = i2c_add_adapter(adapter);
> if (ret)
> return ret;
>
> return devm_add_action_or_reset(dev, devm_i2c_del_adapter,
> adapter);
> }
>
>
> You should probably use the devm_add_action_or_reset() wrapper here
> too,
> catching the unlikely devm_add_action() alloc failure.
>
I was thinking of it but as the gpio registration succeeded I was
thinking that we could go on with it - (which means we can proceed but
the gpio is never released.)
I am not sure how much difference it makes in the case of small alloc
failure ;)
But as it seems I am in any case re-spinning this I can change this to
the devm_add_action_or_reset() and fail the gpio_regmap registration if
alloc fails.
Best Regards
Matti Vaittinen
next prev parent reply other threads:[~2021-05-21 10:32 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-21 6:27 [PATCH v2 0/3] gpio: gpio-regmap: Support few custom operations Matti Vaittinen
2021-05-21 6:27 ` [PATCH v2 1/3] gpio: regmap: Support few IC specific operations Matti Vaittinen
2021-05-21 8:04 ` Michael Walle
2021-05-21 10:09 ` Andy Shevchenko
2021-05-21 10:19 ` Michael Walle
2021-05-21 10:25 ` Vaittinen, Matti
2021-05-21 10:46 ` Michael Walle
2021-05-21 11:36 ` Vaittinen, Matti
2021-05-21 11:19 ` Andy Shevchenko
2021-05-21 11:41 ` Vaittinen, Matti
2021-05-21 10:20 ` Vaittinen, Matti
2021-05-21 6:28 ` [PATCH v2 2/3] gpio: gpio-regmap: Use devm_add_action() Matti Vaittinen
2021-05-21 8:10 ` Michael Walle
2021-05-21 8:38 ` Bjørn Mork
2021-05-21 10:30 ` Vaittinen, Matti [this message]
2021-05-21 16:35 ` Bartosz Golaszewski
2021-05-24 5:01 ` Vaittinen, Matti
2021-05-21 10:10 ` Andy Shevchenko
2021-05-21 6:29 ` [PATCH v2 3/3] gpio: bd71815: Use gpio-regmap Matti Vaittinen
2021-05-21 10:12 ` Andy Shevchenko
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