linux-kernel - [PATCH v2 25/28] drivers: Introduce driver_find_device_by

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Date:   Fri, 14 Jun 2019 18:54:20 +0100
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     linux-kernel@...r.kernel.org
Cc:     gregkh@...uxfoundation.org, rafael@...nel.org,
        suzuki.poulose@....com
Subject: [PATCH v2 25/28] drivers: Introduce driver_find_device_by_devt() helper

Add a wrapper to driver_find_device() to search for a device
by the device type, reusing the generic match function.

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
---
 include/linux/device.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/linux/device.h b/include/linux/device.h
index 2cf49f7..f7f6a43 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -463,6 +463,18 @@ driver_find_device_by_fwnode(struct device_driver *drv,
 	return driver_find_device(drv, NULL, fwnode, device_match_fwnode);
 }
 
+/**
+ * driver_find_device_by_devt- device iterator for locating a particular device
+ * by devt.
+ * @driver: the driver we're iterating
+ * @devt: devt pointer to match.
+ */
+static inline struct device *driver_find_device_by_devt(struct device_driver *drv,
+							dev_t devt)
+{
+	return driver_find_device(drv, NULL, &devt, device_match_devt);
+}
+
 void driver_deferred_probe_add(struct device *dev);
 int driver_deferred_probe_check_state(struct device *dev);
 
-- 
2.7.4