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From: Stephen Boyd <swboyd@chromium.org>
To: Daniel Campello <campello@chromium.org>,
	LKML <devicetree@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>
Cc: Jonathan Cameron <jic23@kernel.org>,
	Daniel Campello <campello@chromium.org>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	Douglas Anderson <dianders@chromium.org>,
	Gwendal Grignou <gwendal@chromium.org>,
	Hartmut Knaack <knaack.h@gmx.de>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
	linux-iio@vger.kernel.org
Subject: Re: [PATCH v2 03/14] iio: sx9310: Fix irq handling
Date: Wed, 29 Jul 2020 01:40:59 -0700
Message-ID: <159601205939.1360974.7963147221648753018@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <20200728170317.v2.3.Idbfcd2e92d2fd89b6ed2e83211bd3e6c06852c33@changeid>

Quoting Daniel Campello (2020-07-28 16:05:09)
> Fixes enable/disable irq handling at various points. The driver needs to
> only enable/disable irqs if there is an actual irq handler installed.
> 
> Signed-off-by: Daniel Campello <campello@chromium.org>
> ---
> 
> Changes in v2:
>  - Reordered error handling on sx9310_resume()
> 
>  drivers/iio/proximity/sx9310.c | 26 ++++++++++++++++----------
>  1 file changed, 16 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/iio/proximity/sx9310.c b/drivers/iio/proximity/sx9310.c
> index 07895d4b935d12..108d82ba81146e 100644
> --- a/drivers/iio/proximity/sx9310.c
> +++ b/drivers/iio/proximity/sx9310.c
> @@ -376,13 +376,15 @@ static int sx9310_read_proximity(struct sx9310_data *data,
>         if (ret < 0)
>                 goto out;
>  
> -       ret = sx9310_enable_irq(data, SX9310_CONVDONE_IRQ);
> -       if (ret < 0)
> -               goto out_put_channel;
> +       if (data->client->irq) {
> +               ret = sx9310_enable_irq(data, SX9310_CONVDONE_IRQ);

I still think it makes more sense to push the if condition inside the
enable/disable irq functions so that the call sites read simpler.

> +               if (ret)
> +                       goto out_put_channel;
> +       }
>  
>         mutex_unlock(&data->mutex);
>  
> -       if (data->client->irq > 0) {
> +       if (data->client->irq) {
>                 ret = wait_for_completion_interruptible(&data->completion);
>                 reinit_completion(&data->completion);
>         } else {
> @@ -401,9 +403,11 @@ static int sx9310_read_proximity(struct sx9310_data *data,
>         *val = sign_extend32(be16_to_cpu(rawval),
>                              (chan->address == SX9310_REG_DIFF_MSB ? 11 : 15));
>  
> -       ret = sx9310_disable_irq(data, SX9310_CONVDONE_IRQ);
> -       if (ret < 0)
> -               goto out_put_channel;
> +       if (data->client->irq) {
> +               ret = sx9310_disable_irq(data, SX9310_CONVDONE_IRQ);
> +               if (ret)
> +                       goto out_put_channel;
> +       }
>  
>         ret = sx9310_put_read_channel(data, chan->channel);
>         if (ret < 0)
> @@ -414,7 +418,8 @@ static int sx9310_read_proximity(struct sx9310_data *data,
>         return IIO_VAL_INT;
>  
>  out_disable_irq:
> -       sx9310_disable_irq(data, SX9310_CONVDONE_IRQ);
> +       if (data->client->irq)
> +               sx9310_disable_irq(data, SX9310_CONVDONE_IRQ);

And so this isn't duplicated check.

>  out_put_channel:
>         sx9310_put_read_channel(data, chan->channel);
>  out:

  reply index

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-25  0:40 [PATCH] iio: sx9310: Fixes dropped on initial commit Daniel Campello
2020-07-26  8:10 ` Andy Shevchenko
2020-07-26 11:53 ` Jonathan Cameron
2020-07-28 15:12 ` [PATCH 00/15] sx9310 iio driver updates Daniel Campello
2020-07-28 15:12   ` [PATCH 01/15] dt-bindings: iio: Add bindings for sx9310 sensor Daniel Campello
2020-07-28 22:06     ` Stephen Boyd
2020-07-28 15:12   ` [PATCH 02/15] iio: sx9310: Update macros declarations Daniel Campello
2020-07-28 19:42     ` Stephen Boyd
2020-07-28 15:12   ` [PATCH 03/15] iio: sx9310: Fix irq handling Daniel Campello
2020-07-28 18:08     ` Andy Shevchenko
2020-07-28 20:07       ` Daniel Campello
2020-07-28 20:15         ` Stephen Boyd
2020-07-28 15:12   ` [PATCH 04/15] iio: sx9310: Remove acpi and of table macros Daniel Campello
2020-07-28 18:09     ` Andy Shevchenko
2020-07-28 20:47       ` Daniel Campello
2020-07-28 21:28         ` Stephen Boyd
2020-07-28 15:12   ` [PATCH 05/15] iio: sx9310: Change from .probe to .probe_new Daniel Campello
2020-07-28 18:10     ` Andy Shevchenko
2020-07-28 19:32     ` Stephen Boyd
2020-07-28 15:12   ` [PATCH 06/15] iio: sx9310: Align memory Daniel Campello
2020-07-28 18:11     ` Andy Shevchenko
2020-07-28 21:26       ` Daniel Campello
2020-07-29  6:52         ` Andy Shevchenko
2020-07-28 15:12   ` [PATCH 07/15] iio: sx9310: Use long instead of int for channel bitmaps Daniel Campello
2020-07-28 18:13     ` Andy Shevchenko
2020-07-28 19:37     ` Stephen Boyd
2020-07-28 15:12   ` [PATCH 08/15] iio: sx9310: Use regmap_read_poll_timeout() for compensation Daniel Campello
2020-07-28 18:14     ` Andy Shevchenko
2020-07-28 19:37     ` Stephen Boyd
2020-07-28 15:12   ` [PATCH 09/15] iio: sx9310: Update copyright Daniel Campello
2020-07-28 15:12   ` [PATCH 10/15] iio: sx9310: Simplify error return handling Daniel Campello
2020-07-28 18:15     ` Andy Shevchenko
2020-07-28 19:40     ` Stephen Boyd
2020-07-28 21:23       ` Daniel Campello
2020-07-28 21:32         ` Stephen Boyd
2020-07-28 22:06           ` Daniel Campello
2020-07-28 15:12   ` [PATCH 11/15] iio: sx9310: Use variable to hold &client->dev Daniel Campello
2020-07-28 18:16     ` Andy Shevchenko
2020-07-28 19:41     ` Stephen Boyd
2020-07-28 15:12   ` [PATCH 12/15] iio: sx9310: Miscellaneous format fixes Daniel Campello
2020-07-28 18:16     ` Andy Shevchenko
2020-07-28 19:41     ` Stephen Boyd
2020-07-28 15:12   ` [PATCH 13/15] iio: sx9310: Add newlines to printks Daniel Campello
2020-07-28 18:19     ` Andy Shevchenko
2020-07-28 18:24       ` Joe Perches
2020-07-28 18:32         ` Andy Shevchenko
2020-07-28 15:12   ` [PATCH 14/15] iio: sx9310: Drop channel_users[] Daniel Campello
2020-07-28 18:20     ` Andy Shevchenko
2020-07-28 15:12   ` [PATCH 15/15] iio: sx9310: Enable vdd and svdd regulators at probe Daniel Campello
2020-07-28 18:21     ` Andy Shevchenko
2020-07-28 23:05   ` [PATCH v2 00/14] sx9310 iio driver updates Daniel Campello
2020-07-28 23:05     ` [PATCH v2 01/14] dt-bindings: iio: Add bindings for sx9310 sensor Daniel Campello
2020-07-29  0:52       ` Stephen Boyd
2020-07-28 23:05     ` [PATCH v2 02/14] iio: sx9310: Update macros declarations Daniel Campello
2020-07-28 23:05     ` [PATCH v2 03/14] iio: sx9310: Fix irq handling Daniel Campello
2020-07-29  8:40       ` Stephen Boyd [this message]
2020-07-28 23:05     ` [PATCH v2 04/14] iio: sx9310: Remove acpi and of table macros Daniel Campello
2020-07-29  6:54       ` Andy Shevchenko
2020-07-29  8:38       ` Stephen Boyd
2020-07-28 23:05     ` [PATCH v2 05/14] iio: sx9310: Change from .probe to .probe_new Daniel Campello
2020-07-28 23:05     ` [PATCH v2 06/14] iio: sx9310: Fixes various memory handling Daniel Campello
2020-07-28 23:05     ` [PATCH v2 07/14] iio: sx9310: Use long instead of int for channel bitmaps Daniel Campello
2020-07-29  1:03       ` Stephen Boyd
2020-07-29  7:00         ` Andy Shevchenko
2020-07-31 15:44           ` Daniel Campello
2020-07-31 15:52             ` Andy Shevchenko
2020-07-28 23:05     ` [PATCH v2 08/14] iio: sx9310: Use regmap_read_poll_timeout() for compensation Daniel Campello
2020-07-28 23:05     ` [PATCH v2 09/14] iio: sx9310: Update copyright Daniel Campello
2020-07-28 23:05     ` [PATCH v2 10/14] iio: sx9310: Simplify error return handling Daniel Campello
2020-07-29  8:42       ` Stephen Boyd
2020-07-28 23:05     ` [PATCH v2 11/14] iio: sx9310: Use variable to hold &client->dev Daniel Campello
2020-07-28 23:05     ` [PATCH v2 12/14] iio: sx9310: Miscellaneous format fixes Daniel Campello
2020-07-28 23:05     ` [PATCH v2 13/14] iio: sx9310: Drop channel_users[] Daniel Campello
2020-07-28 23:05     ` [PATCH v2 14/14] iio: sx9310: Enable vdd and svdd regulators at probe Daniel Campello
2020-07-29  0:50     ` [PATCH v2 00/14] sx9310 iio driver updates Stephen Boyd
2020-07-29  9:20     ` Stephen Boyd

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