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| author | Len Brown | 2010-05-22 22:34:10 +0200 |
|---|---|---|
| committer | Len Brown | 2010-05-27 19:04:04 +0200 |
| commit | c0d64cb031c21f163a0ec15cf10844bcf0ceedcf (patch) | |
| tree | ce65dc6b8cbda91e8c1f1c69753265618e8d9ae6 /drivers/cpuidle | |
| parent | cpuidle: fail to register if !CONFIG_CPU_IDLE (diff) | |
| download | kernel-qcow2-linux-c0d64cb031c21f163a0ec15cf10844bcf0ceedcf.tar.gz kernel-qcow2-linux-c0d64cb031c21f163a0ec15cf10844bcf0ceedcf.tar.xz kernel-qcow2-linux-c0d64cb031c21f163a0ec15cf10844bcf0ceedcf.zip | |
cpuidle: add cpuidle_unregister_driver() error check
Assure that cpuidle_unregister_driver() will not clobber
the registered driver if unregistered by somebody else.
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/driver.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/cpuidle/driver.c b/drivers/cpuidle/driver.c index 2257004fe33d..826b5c0aa12b 100644 --- a/drivers/cpuidle/driver.c +++ b/drivers/cpuidle/driver.c @@ -45,8 +45,11 @@ EXPORT_SYMBOL_GPL(cpuidle_register_driver); */ void cpuidle_unregister_driver(struct cpuidle_driver *drv) { - if (!drv) + if (drv != cpuidle_curr_driver) { + WARN(1, "invalid cpuidle_unregister_driver(%s)\n", + drv->name); return; + } spin_lock(&cpuidle_driver_lock); cpuidle_curr_driver = NULL; |