Commit 3735d524 authored Aug 16, 2012 by Konrad Rzeszutek Wilk Committed by Rafael J. Wysocki Aug 17, 2012

intel_idle: Check cpu_idle_get_driver() for NULL before dereferencing it.



If the machine is booted without any cpu_idle driver set
(b/c disable_cpuidle() has been called) we should follow
other users of cpu_idle API and check the return value
for NULL before using it.

Reported-and-tested-by: Mark van Dijk <mark@internecto.net>
Suggested-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

parent 5fbbb90d

drivers/idle/intel_idle.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -606,8 +606,9 @@ static int __init intel_idle_init(void)
		intel_idle_cpuidle_driver_init();
		retval = cpuidle_register_driver(&intel_idle_driver);
		if (retval) {
		struct cpuidle_driver *drv = cpuidle_get_driver();
		printk(KERN_DEBUG PREFIX "intel_idle yielding to %s",
		cpuidle_get_driver()->name);
		drv ? drv->name : "none");
		return retval;
		}