From: Jonathan Cameron <jic23@kernel.org>
To: "Nuno Sá" <nuno.sa@analog.com>
Cc: <linux-arm-kernel@lists.infradead.org>,
<linux-rockchip@lists.infradead.org>,
<linux-amlogic@lists.infradead.org>, <linux-imx@nxp.com>,
<linux-iio@vger.kernel.org>, Chunyan Zhang <zhang.lyra@gmail.com>,
Michael Hennerich <Michael.Hennerich@analog.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Sascha Hauer <s.hauer@pengutronix.de>,
Cixi Geng <cixi.geng1@unisoc.com>,
Kevin Hilman <khilman@baylibre.com>,
Vladimir Zapolskiy <vz@mleia.com>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Alexandru Ardelean <aardelean@deviqon.com>,
Fabio Estevam <festevam@gmail.com>,
Andriy Tryshnivskyy <andriy.tryshnivskyy@opensynergy.com>,
Haibo Chen <haibo.chen@nxp.com>, Shawn Guo <shawnguo@kernel.org>,
Hans de Goede <hdegoede@redhat.com>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Heiko Stuebner <heiko@sntech.de>,
Florian Boor <florian.boor@kernelconcepts.de>,
Ciprian Regus <ciprian.regus@analog.com>,
Lars-Peter Clausen <lars@metafoo.de>,
Andy Shevchenko <andy.shevchenko@gmail.com>,
Neil Armstrong <narmstrong@baylibre.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
Jyoti Bhayana <jbhayana@google.com>, Chen-Yu Tsai <wens@csie.org>,
Orson Zhai <orsonzhai@gmail.com>
Subject: Re: [PATCH 05/15] iio: adc: lpc32xx_adc: do not use internal iio_dev lock
Date: Sat, 24 Sep 2022 16:27:06 +0100 [thread overview]
Message-ID: <20220924162706.2a731356@jic23-huawei> (raw)
In-Reply-To: <20220920112821.975359-6-nuno.sa@analog.com>
On Tue, 20 Sep 2022 13:28:11 +0200
Nuno Sá <nuno.sa@analog.com> wrote:
> The iio_device lock is only meant for internal use. Hence define a
> device local lock to protect against concurrent accesses.
As with previous patch, mention the additional include cleanup.
>
> Signed-off-by: Nuno Sá <nuno.sa@analog.com>
> ---
> drivers/iio/adc/lpc32xx_adc.c | 10 +++++++---
> 1 file changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/iio/adc/lpc32xx_adc.c b/drivers/iio/adc/lpc32xx_adc.c
> index b56ce15255cf..4136cf536d58 100644
> --- a/drivers/iio/adc/lpc32xx_adc.c
> +++ b/drivers/iio/adc/lpc32xx_adc.c
> @@ -15,6 +15,7 @@
> #include <linux/io.h>
> #include <linux/module.h>
> #include <linux/mod_devicetable.h>
> +#include <linux/mutex.h>
> #include <linux/platform_device.h>
> #include <linux/regulator/consumer.h>
>
> @@ -49,6 +50,8 @@ struct lpc32xx_adc_state {
> struct clk *clk;
> struct completion completion;
> struct regulator *vref;
> + /* lock to protect against multiple access to the device */
> + struct mutex lock;
>
> u32 value;
> };
> @@ -64,10 +67,10 @@ static int lpc32xx_read_raw(struct iio_dev *indio_dev,
>
> switch (mask) {
> case IIO_CHAN_INFO_RAW:
> - mutex_lock(&indio_dev->mlock);
> + mutex_lock(&st->lock);
> ret = clk_prepare_enable(st->clk);
> if (ret) {
> - mutex_unlock(&indio_dev->mlock);
> + mutex_unlock(&st->lock);
> return ret;
> }
> /* Measurement setup */
> @@ -80,7 +83,7 @@ static int lpc32xx_read_raw(struct iio_dev *indio_dev,
> wait_for_completion(&st->completion); /* set by ISR */
> clk_disable_unprepare(st->clk);
> *val = st->value;
> - mutex_unlock(&indio_dev->mlock);
> + mutex_unlock(&st->lock);
>
> return IIO_VAL_INT;
>
> @@ -158,6 +161,7 @@ static int lpc32xx_adc_probe(struct platform_device *pdev)
> return -ENOMEM;
>
> st = iio_priv(iodev);
> + mutex_init(&st->lock);
>
> st->adc_base = devm_ioremap(&pdev->dev, res->start,
> resource_size(res));
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next prev parent reply other threads:[~2022-09-24 15:27 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-20 11:28 [PATCH 00/15] Make 'mlock' really private Nuno Sá
2022-09-20 11:28 ` [PATCH 01/15] iio: adc: ad_sigma_delta: do not use internal iio_dev lock Nuno Sá
2022-09-20 11:54 ` Miquel Raynal
2022-09-24 14:22 ` Jonathan Cameron
2022-09-20 11:28 ` [PATCH 02/15] iio: adc: ad799x: " Nuno Sá
2022-09-24 14:45 ` Jonathan Cameron
2022-09-26 11:22 ` Nuno Sá
2022-09-20 11:28 ` [PATCH 03/15] iio: adc: axp288_adc: " Nuno Sá
2022-09-20 13:13 ` Andy Shevchenko
2022-09-20 13:18 ` Sa, Nuno
2022-09-20 13:37 ` Andy Shevchenko
2022-09-20 13:39 ` Andy Shevchenko
2022-09-20 13:46 ` Sa, Nuno
2022-09-20 15:12 ` Andy Shevchenko
2022-09-21 9:07 ` Nuno Sá
2022-09-24 15:23 ` Jonathan Cameron
2022-09-24 15:24 ` Jonathan Cameron
2022-09-20 11:28 ` [PATCH 04/15] iio: adc: imx7d_adc: " Nuno Sá
2022-09-24 15:26 ` Jonathan Cameron
2022-09-20 11:28 ` [PATCH 05/15] iio: adc: lpc32xx_adc: " Nuno Sá
2022-09-24 15:27 ` Jonathan Cameron [this message]
2022-09-20 11:28 ` [PATCH 06/15] iio: adc: ltc2947-core: " Nuno Sá
2022-09-20 11:28 ` [PATCH 07/15] iio: adc: meson_saradc: " Nuno Sá
2022-09-25 20:38 ` Martin Blumenstingl
2022-09-20 11:28 ` [PATCH 08/15] iio: adc: rockchip_saradc: " Nuno Sá
2022-09-20 11:28 ` [PATCH 09/15] iio: adc: sc27xx_adc: " Nuno Sá
2022-09-20 11:28 ` [PATCH 10/15] iio: adc: vf610_adc: " Nuno Sá
2022-09-24 15:37 ` Jonathan Cameron
2022-09-20 11:28 ` [PATCH 11/15] iio: common: scmi_iio: " Nuno Sá
2022-09-24 15:42 ` Jonathan Cameron
2022-09-20 11:28 ` [PATCH 12/15] iio: fyro: itg3200_core: " Nuno Sá
2022-09-24 15:43 ` Jonathan Cameron
2022-09-24 15:46 ` Jonathan Cameron
2022-09-20 11:28 ` [PATCH 13/15] iio: health: max30100: " Nuno Sá
2022-09-20 12:23 ` Miquel Raynal
2022-09-20 12:44 ` Sa, Nuno
2022-09-20 12:55 ` Miquel Raynal
2022-09-20 13:15 ` Sa, Nuno
2022-09-20 13:53 ` Miquel Raynal
2022-09-20 14:56 ` Nuno Sá
2022-09-20 15:10 ` Miquel Raynal
2022-09-24 15:53 ` Jonathan Cameron
2022-09-26 10:06 ` Nuno Sá
2022-10-02 11:03 ` Jonathan Cameron
2022-10-04 7:57 ` Nuno Sá
2022-09-20 11:28 ` [PATCH 14/15] iio: health: max30102: " Nuno Sá
2022-09-24 15:54 ` Jonathan Cameron
2022-09-30 10:04 ` Nuno Sá
2022-10-02 11:08 ` Jonathan Cameron
2022-10-04 7:53 ` Nuno Sá
2022-09-20 11:28 ` [PATCH 15/15] iio: core: move 'mlock' to 'struct iio_dev_opaque' Nuno Sá
2022-09-24 15:56 ` Jonathan Cameron
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