From: Jonathan Cameron <jic23@kernel.org>
To: "Nuno Sá" <noname.nuno@gmail.com>
Cc: Nuno Sa <nuno.sa@analog.com>,
linux-iio@vger.kernel.org, Lars-Peter Clausen <lars@metafoo.de>
Subject: Re: [PATCH v3 4/4] iio: inkern: move to the cleanup.h magic
Date: Sat, 9 Mar 2024 17:41:45 +0000 [thread overview]
Message-ID: <20240309174145.0834de04@jic23-huawei> (raw)
In-Reply-To: <740c98678f943c761623800544a8ba998aa4aa93.camel@gmail.com>
On Mon, 04 Mar 2024 09:04:49 +0100
Nuno Sá <noname.nuno@gmail.com> wrote:
> On Sun, 2024-03-03 at 14:24 +0000, Jonathan Cameron wrote:
> > On Thu, 29 Feb 2024 16:10:28 +0100
> > Nuno Sa <nuno.sa@analog.com> wrote:
> >
> > > Use the new cleanup magic for handling mutexes in IIO. This allows us to
> > > greatly simplify some code paths.
> > >
> > > While at it, also use __free(kfree) where allocations are done and drop
> > > obvious comment in iio_channel_read_min().
> > >
> > > Signed-off-by: Nuno Sa <nuno.sa@analog.com>
> >
> > Hi Nuno
> >
> > Series looks very nice. One trivial thing inline - I can tidy that up whilst
> > applying if nothing else comes up.
> >
> > Given this obviously touches a lot of core code, so even though simple it's
> > high risk for queuing up late. I also have a complex mess already queued up
> > for the coming merge window. Hence I'm going to hold off on applying this
> > series until the start of the next cycle.
> >
> > Nothing outside IIO is going to depend on it, so it's rather simpler decision
> > to hold it than for the ones that add new general purpose infrastructure.
> >
> >
>
> Seems reasonable... It may even give us some time to see how the cond_guard()
> and scoped_cond_guard() will end up.
Absolutely - thankfully converting to the suggestions Linus made will be straight
forwards, so hopefully the worst that happens is a complex merge, or some
fixing up to do afterwards.
>
> >
> >
> > > EXPORT_SYMBOL_GPL(iio_read_channel_attribute);
> > >
> > > @@ -757,29 +711,24 @@ int iio_read_channel_processed_scale(struct
> > > iio_channel *chan, int *val,
> > > struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan-
> > > >indio_dev);
> > > int ret;
> > >
> > > - mutex_lock(&iio_dev_opaque->info_exist_lock);
> > > - if (!chan->indio_dev->info) {
> > > - ret = -ENODEV;
> > > - goto err_unlock;
> > > - }
> > > + guard(mutex)(&iio_dev_opaque->info_exist_lock);
> > > + if (!chan->indio_dev->info)
> > > + return -ENODEV;
> > >
> > > if (iio_channel_has_info(chan->channel, IIO_CHAN_INFO_PROCESSED)) {
> > > ret = iio_channel_read(chan, val, NULL,
> > > IIO_CHAN_INFO_PROCESSED);
> > > if (ret < 0)
> > > - goto err_unlock;
> > > + return ret;
> > > *val *= scale;
> >
> > return 0;
> >
> > > } else {
> > could drop the else.
> >
> > > ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_RAW);
> > > if (ret < 0)
> > > - goto err_unlock;
> > > + return ret;
> > > ret = iio_convert_raw_to_processed_unlocked(chan, *val,
> > > val,
> > > scale);
> > return iio_convert_raw_to_proc...
> >
>
> Hmm, unless I completely misunderstood your comments on v2, this was exactly
> what I had but you recommended to leave the else branch :).
>
That was a younger me :) Either way is fine.
Jonathan
> - Nuno Sá
>
next prev parent reply other threads:[~2024-03-09 17:41 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-29 15:10 [PATCH v3 0/4] iio: move IIO to the cleanup.h magic Nuno Sa
2024-02-29 15:10 ` [PATCH v3 1/4] iio: core: move to " Nuno Sa
2024-02-29 15:10 ` [PATCH v3 2/4] iio: trigger: move to the " Nuno Sa
2024-03-16 19:32 ` Andy Shevchenko
2024-03-18 12:33 ` Jonathan Cameron
2024-03-18 13:12 ` Andy Shevchenko
2024-03-18 14:15 ` Jonathan Cameron
2024-03-16 19:39 ` Andy Shevchenko
2024-03-18 9:22 ` Nuno Sá
2024-02-29 15:10 ` [PATCH v3 3/4] iio: buffer: iio: core: " Nuno Sa
2024-03-16 19:38 ` Andy Shevchenko
2024-03-18 9:23 ` Nuno Sá
2024-03-18 12:35 ` Jonathan Cameron
2024-03-16 19:49 ` Andy Shevchenko
2024-02-29 15:10 ` [PATCH v3 4/4] iio: inkern: " Nuno Sa
2024-03-03 14:24 ` Jonathan Cameron
2024-03-04 8:04 ` Nuno Sá
2024-03-09 17:41 ` Jonathan Cameron [this message]
2024-03-16 13:26 ` Jonathan Cameron
2024-03-16 19:48 ` Andy Shevchenko
2024-03-18 9:20 ` Nuno Sá
2024-03-23 18:09 ` Jonathan Cameron
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