PM / wakeirq: check that wake IRQ is valid before accepting it

Check that IRQ number passed to dev_pm_set_wake_irq() and
dev_pm_set_dedicated_wake_irq() is valid (not negative) before
accepting it.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/base/power/wakeirq.c b/drivers/base/power/wakeirq.c
index eb6e674..0d77cd6 100644 (file)
--- a/drivers/base/power/wakeirq.c
+++ b/drivers/base/power/wakeirq.c
@@ -68,6 +68,9 @@ int dev_pm_set_wake_irq(struct device *dev, int irq)
        struct wake_irq *wirq;
        int err;
 
+       if (irq < 0)
+               return -EINVAL;
+
        wirq = kzalloc(sizeof(*wirq), GFP_KERNEL);
        if (!wirq)
                return -ENOMEM;
@@ -167,6 +170,9 @@ int dev_pm_set_dedicated_wake_irq(struct device *dev, int irq)
        struct wake_irq *wirq;
        int err;
 
+       if (irq < 0)
+               return -EINVAL;
+
        wirq = kzalloc(sizeof(*wirq), GFP_KERNEL);
        if (!wirq)
                return -ENOMEM;