linux-kernel - [PATCH] genirq: devres: use dev_name(dev) as default for devname

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Date:   Sun, 12 Feb 2017 16:31:44 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] genirq: devres: use dev_name(dev) as default for devname

Allow the devname parameter to be NULL and use dev_name(dev) in this case.
This should be an appropriate default for most use cases.

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 kernel/irq/devres.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c
index 74d90a75..adb0baa6 100644
--- a/kernel/irq/devres.c
+++ b/kernel/irq/devres.c
@@ -33,7 +33,7 @@ static int devm_irq_match(struct device *dev, void *res, void *data)
  *	@thread_fn: function to be called in a threaded interrupt context. NULL
  *		    for devices which handle everything in @handler
  *	@irqflags: Interrupt type flags
- *	@devname: An ascii name for the claiming device
+ *	@devname: An ascii name for the claiming device, dev_name(dev) if NULL
  *	@dev_id: A cookie passed back to the handler function
  *
  *	Except for the extra @dev argument, this function takes the
@@ -57,6 +57,9 @@ int devm_request_threaded_irq(struct device *dev, unsigned int irq,
 	if (!dr)
 		return -ENOMEM;
 
+	if (!devname)
+		devname = dev_name(dev);
+
 	rc = request_threaded_irq(irq, handler, thread_fn, irqflags, devname,
 				  dev_id);
 	if (rc) {
@@ -80,7 +83,7 @@ EXPORT_SYMBOL(devm_request_threaded_irq);
  *	@thread_fn: function to be called in a threaded interrupt context. NULL
  *		    for devices which handle everything in @handler
  *	@irqflags: Interrupt type flags
- *	@devname: An ascii name for the claiming device
+ *	@devname: An ascii name for the claiming device, dev_name(dev) if NULL
  *	@dev_id: A cookie passed back to the handler function
  *
  *	Except for the extra @dev argument, this function takes the
@@ -103,6 +106,9 @@ int devm_request_any_context_irq(struct device *dev, unsigned int irq,
 	if (!dr)
 		return -ENOMEM;
 
+	if (!devname)
+		devname = dev_name(dev);
+
 	rc = request_any_context_irq(irq, handler, irqflags, devname, dev_id);
 	if (rc < 0) {
 		devres_free(dr);
-- 
2.11.1