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From: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
To: linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, linux-input@vger.kernel.org,
	linux-tegra@vger.kernel.org, patches@opensource.cirrus.com,
	ibm-acpi-devel@lists.sourceforge.net,
	platform-driver-x86@vger.kernel.org
Cc: "Rafael J . Wysocki" <rjw@rjwysocki.net>,
	Len Brown <lenb@kernel.org>, Jonathan Cameron <jic23@kernel.org>,
	Hartmut Knaack <knaack.h@gmx.de>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
	Kukjin Kim <kgene@kernel.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	Vladimir Zapolskiy <vz@mleia.com>,
	Sylvain Lemieux <slemieux.tyco@gmail.com>,
	Laxman Dewangan <ldewangan@nvidia.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Barry Song <baohua@kernel.org>,
	Michael Hennerich <michael.hennerich@analog.com>,
	Nick Dyer <nick@shmanahar.org>,
	Hans de Goede <hdegoede@redhat.com>,
	Ferruh Yigit <fery@cypress.com>, Sangwon Jee <jeesw@melfas.com>,
	Peter Hutterer <peter.hutterer@redhat.com>,
	Henrique de Moraes Holschuh <ibm-acpi@hmh.eng.br>,
	Andrzej Pietrasiewicz <andrzej.p@collabora.com>,
	kernel@collabora.com
Subject: [PATCH v3 1/7] Input: add input_device_enabled()
Date: Fri,  5 Jun 2020 19:33:29 +0200
Message-ID: <20200605173335.13753-2-andrzej.p@collabora.com> (raw)
In-Reply-To: <20200605173335.13753-1-andrzej.p@collabora.com>

A helper function for drivers to decide if the device is used or not.
A lockdep check is introduced as inspecting ->users should be done under
input device's mutex.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
---
 drivers/input/input.c | 8 ++++++++
 include/linux/input.h | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 3cfd2c18eebd..41377bfa142d 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -2127,6 +2127,14 @@ void input_enable_softrepeat(struct input_dev *dev, int delay, int period)
 }
 EXPORT_SYMBOL(input_enable_softrepeat);
 
+bool input_device_enabled(struct input_dev *dev)
+{
+	lockdep_assert_held(&dev->mutex);
+
+	return dev->users > 0;
+}
+EXPORT_SYMBOL_GPL(input_device_enabled);
+
 /**
  * input_register_device - register device with input core
  * @dev: device to be registered
diff --git a/include/linux/input.h b/include/linux/input.h
index 56f2fd32e609..eda4587dba67 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -502,6 +502,8 @@ bool input_match_device_id(const struct input_dev *dev,
 
 void input_enable_softrepeat(struct input_dev *dev, int delay, int period);
 
+bool input_device_enabled(struct input_dev *dev);
+
 extern struct class input_class;
 
 /**
-- 
2.17.1


  reply index

Thread overview: 73+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200506002746.GB89269@dtor-ws>
2020-05-15 16:49 ` [PATCHv2 0/7] Support inhibiting input devices Andrzej Pietrasiewicz
2020-05-15 16:51   ` [PATCHv2 1/7] Input: add input_device_enabled() Andrzej Pietrasiewicz
2020-05-15 16:52   ` [PATCHv2 4/7] iio: adc: exynos: Use input_device_enabled() Andrzej Pietrasiewicz
2020-05-15 16:52   ` [PATCHv2 6/7] Input: Add "inhibited" property Andrzej Pietrasiewicz
2020-05-15 18:19   ` [PATCHv2 0/7] Support inhibiting input devices Hans de Goede
2020-05-17 22:55     ` Peter Hutterer
2020-05-18  2:40       ` Dmitry Torokhov
2020-05-18  7:36         ` Hans de Goede
2020-05-22 15:35         ` Andrzej Pietrasiewicz
2020-05-27  6:13           ` Peter Hutterer
2020-05-18 10:48     ` Andrzej Pietrasiewicz
2020-05-18 12:24       ` Hans de Goede
2020-05-18 13:49         ` Andrzej Pietrasiewicz
2020-05-18 14:23           ` Hans de Goede
2020-05-19  9:02             ` Andrzej Pietrasiewicz
2020-05-19  9:36               ` Hans de Goede
2020-05-27  6:34                 ` Dmitry Torokhov
2020-06-02 16:56                   ` Andrzej Pietrasiewicz
2020-06-02 17:52                     ` Dmitry Torokhov
2020-06-02 18:50                       ` Andrzej Pietrasiewicz
2020-06-02 20:19                         ` Hans de Goede
2020-06-03 13:07                           ` Andrzej Pietrasiewicz
2020-06-03 17:38                             ` Hans de Goede
2020-06-03 17:54                               ` Andrzej Pietrasiewicz
2020-06-03 19:37                                 ` Hans de Goede
2020-06-04  7:28                                   ` Dmitry Torokhov
2020-06-05 17:33                                     ` [PATCH v3 " Andrzej Pietrasiewicz
2020-06-05 17:33                                       ` Andrzej Pietrasiewicz [this message]
2020-06-05 17:33                                       ` [PATCH v3 2/7] Input: use input_device_enabled() Andrzej Pietrasiewicz
2020-06-05 17:33                                       ` [PATCH v3 3/7] ACPI: button: Access input device's users under appropriate mutex Andrzej Pietrasiewicz
2020-06-05 17:33                                       ` [PATCH v3 4/7] ACPI: button: Use input_device_enabled() helper Andrzej Pietrasiewicz
2020-06-05 17:33                                       ` [PATCH v3 5/7] iio: adc: exynos: Use input_device_enabled() Andrzej Pietrasiewicz
2020-06-05 19:49                                         ` Michał Mirosław
2020-06-05 17:33                                       ` [PATCH v3 6/7] platform/x86: thinkpad_acpi: " Andrzej Pietrasiewicz
2020-06-05 17:33                                       ` [PATCH v3 7/7] Input: Add "inhibited" property Andrzej Pietrasiewicz
2020-06-05 17:41                                         ` Hans de Goede
2020-06-08 11:22                                           ` [PATCH v4 0/7] Support inhibiting input devices Andrzej Pietrasiewicz
2020-06-08 11:22                                             ` [PATCH v4 1/7] Input: add input_device_enabled() Andrzej Pietrasiewicz
2020-06-08 11:22                                             ` [PATCH v4 2/7] Input: use input_device_enabled() Andrzej Pietrasiewicz
2020-06-08 11:22                                             ` [PATCH v4 3/7] ACPI: button: Access input device's users under appropriate mutex Andrzej Pietrasiewicz
2020-06-24 15:00                                               ` Rafael J. Wysocki
2020-06-25  5:23                                                 ` Dmitry Torokhov
2020-06-25 10:55                                                   ` Rafael J. Wysocki
2020-06-08 11:22                                             ` [PATCH v4 4/7] ACPI: button: Use input_device_enabled() helper Andrzej Pietrasiewicz
2020-06-25  5:24                                               ` Dmitry Torokhov
2020-06-08 11:22                                             ` [PATCH v4 5/7] iio: adc: exynos: Use input_device_enabled() Andrzej Pietrasiewicz
2020-06-10  1:28                                               ` Michał Mirosław
2020-06-10  7:52                                                 ` [FIXED PATCH " Andrzej Pietrasiewicz
2020-06-08 11:22                                             ` [PATCH v4 6/7] platform/x86: thinkpad_acpi: " Andrzej Pietrasiewicz
2020-06-08 11:22                                             ` [PATCH v4 7/7] Input: Add "inhibited" property Andrzej Pietrasiewicz
2020-06-10  9:49                                             ` [PATCH v4 0/7] Support inhibiting input devices Hans de Goede
2020-06-10 10:38                                               ` Rafael J. Wysocki
2020-06-10 13:12                                                 ` Andrzej Pietrasiewicz
2020-06-10 13:21                                                   ` Hans de Goede
2020-06-10 13:41                                                     ` Andrzej Pietrasiewicz
2020-06-12  8:30                                                       ` Hans de Goede
2020-06-12  8:47                                                         ` Andrzej Pietrasiewicz
2020-06-16 17:29                                                         ` [PATCH] Input: document inhibiting Andrzej Pietrasiewicz
2020-06-16 17:38                                                           ` Randy Dunlap
2020-06-17  7:44                                                           ` Hans de Goede
2020-06-17 10:18                                                             ` [PATCH v2] " Andrzej Pietrasiewicz
2020-06-17 10:21                                                               ` Hans de Goede
2020-06-17 16:52                                                               ` Randy Dunlap
2020-06-23 13:35                                                               ` Pavel Machek
2020-06-10 14:01                                                     ` [PATCH v4 0/7] Support inhibiting input devices Rafael J. Wysocki
2020-06-10 13:52                                                 ` Hans de Goede
2020-06-10 18:28                                                 ` Dmitry Torokhov
2020-06-12  8:14                                                   ` Hans de Goede
2020-06-12  8:17                                             ` Hans de Goede
2020-08-03 14:40                                               ` Andrzej Pietrasiewicz
2020-06-07 20:24                                       ` [PATCH v3 " Pavel Machek
2020-06-08  5:37                                         ` Dmitry Torokhov
2020-06-08  9:28                                           ` Andrzej Pietrasiewicz

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