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| author | Krzysztof Mazur <krzysiek@podlesie.net> | 2013-01-11 23:20:09 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-01-11 23:20:09 +0100 |
| commit | 392370e7aa387185349946d29a0e17b918e51ae6 (patch) | |
| tree | 289075fd7ac72313271792c9866380511ba5b24f /drivers/cpuidle | |
| parent | 9931faca02c604c22335f5a935a501bb2ace6e20 (diff) | |
| download | linux-stable-392370e7aa387185349946d29a0e17b918e51ae6.tar.gz linux-stable-392370e7aa387185349946d29a0e17b918e51ae6.tar.bz2 linux-stable-392370e7aa387185349946d29a0e17b918e51ae6.zip | |
cpuidle: fix number of initialized/destroyed states
Commit bf4d1b5ddb78f86078ac6ae0415802d5f0c68f92 (cpuidle: support
multiple drivers) changed the number of initialized state kobjects
in cpuidle_add_state_sysfs() from device->state_count to
drv->state_count, but left device->state_count in
cpuidle_remove_state_sysfs(). The values of these two fields may be
different, in which case a NULL pointer dereference may happen in
cpuidle_remove_state_sysfs(), for example. Fix this problem by making
cpuidle_add_state_sysfs() use device->state_count too (which restores
the original behavior of it).
[rjw: Changelog]
Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/sysfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c index 340942946106..428754af6236 100644 --- a/drivers/cpuidle/sysfs.c +++ b/drivers/cpuidle/sysfs.c @@ -374,7 +374,7 @@ static int cpuidle_add_state_sysfs(struct cpuidle_device *device) struct cpuidle_driver *drv = cpuidle_get_cpu_driver(device); /* state statistics */ - for (i = 0; i < drv->state_count; i++) { + for (i = 0; i < device->state_count; i++) { kobj = kzalloc(sizeof(struct cpuidle_state_kobj), GFP_KERNEL); if (!kobj) goto error_state; |