[PATCH] PM / wakeirq: Add wakeup name to dedicated wake irqs

[Tony Lindgren]

This makes it easy to grep :wakeup /proc/interrupts.

Cc: Brian Norris <briannor...@chromium.org>
Cc: Grygorii Strashko <grygorii.stras...@ti.com>
Cc: Ulf Hansson <ulf.hans...@linaro.org>
Suggested-by: Jeffy Chen <jeffy.c...@rock-chips.com>
Signed-off-by: Tony Lindgren <t...@atomide.com>
---
 drivers/base/power/power.h   |  1 +
 drivers/base/power/wakeirq.c | 18 +++++++++++++++---
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
--- a/drivers/base/power/power.h
+++ b/drivers/base/power/power.h
@@ -31,6 +31,7 @@ struct wake_irq {
        struct device *dev;
        unsigned int status;
        int irq;
+       char *name;
 };
 
 extern void dev_pm_arm_wake_irq(struct wake_irq *wirq);
diff --git a/drivers/base/power/wakeirq.c b/drivers/base/power/wakeirq.c
--- a/drivers/base/power/wakeirq.c
+++ b/drivers/base/power/wakeirq.c
@@ -112,6 +112,7 @@ void dev_pm_clear_wake_irq(struct device *dev)
                free_irq(wirq->irq, wirq);
                wirq->status &= ~WAKE_IRQ_DEDICATED_MASK;
        }
+       kfree(wirq->name);
        kfree(wirq);
 }
 EXPORT_SYMBOL_GPL(dev_pm_clear_wake_irq);
@@ -175,7 +176,8 @@ static irqreturn_t handle_threaded_wake_irq(int irq, void 
*_wirq)
 int dev_pm_set_dedicated_wake_irq(struct device *dev, int irq)
 {
        struct wake_irq *wirq;
-       int err;
+       int err, namelen;
+       const char *postfix = ":wakeup";
 
        if (irq < 0)
                return -EINVAL;
@@ -184,6 +186,14 @@ int dev_pm_set_dedicated_wake_irq(struct device *dev, int 
irq)
        if (!wirq)
                return -ENOMEM;
 
+       namelen = strlen(dev_name(dev)) + strlen(postfix) + 1;
+       wirq->name = kzalloc(namelen, GFP_KERNEL);
+       if (!wirq->name) {
+               err = -ENOMEM;
+               goto err_free;
+       }
+
+       snprintf(wirq->name, namelen, "%s%s", dev_name(dev), postfix);
        wirq->dev = dev;
        wirq->irq = irq;
        irq_set_status_flags(irq, IRQ_NOAUTOEN);
@@ -196,9 +206,9 @@ int dev_pm_set_dedicated_wake_irq(struct device *dev, int 
irq)
         * so we use a threaded irq.
         */
        err = request_threaded_irq(irq, NULL, handle_threaded_wake_irq,
-                                  IRQF_ONESHOT, dev_name(dev), wirq);
+                                  IRQF_ONESHOT, wirq->name, wirq);
        if (err)
-               goto err_free;
+               goto err_free_name;
 
        err = dev_pm_attach_wake_irq(dev, irq, wirq);
        if (err)
@@ -210,6 +220,8 @@ int dev_pm_set_dedicated_wake_irq(struct device *dev, int 
irq)
 
 err_free_irq:
        free_irq(irq, wirq);
+err_free_name:
+       kfree(wirq->name);
 err_free:
        kfree(wirq);
 
-- 
2.16.1