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| author | Shuah Khan <shuah.kh@samsung.com> | 2013-05-08 01:14:32 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-05-12 14:04:40 +0200 |
| commit | d5e1670afe0c886d6dd92afb7a1f085f88294dc8 (patch) | |
| tree | 8b149c761385bc0d7861cabc06ca06cb3017f723 /drivers/base | |
| parent | f722406faae2d073cc1d01063d1123c35425939e (diff) | |
| download | linux-d5e1670afe0c886d6dd92afb7a1f085f88294dc8.tar.gz linux-d5e1670afe0c886d6dd92afb7a1f085f88294dc8.tar.bz2 linux-d5e1670afe0c886d6dd92afb7a1f085f88294dc8.zip | |
PM: Avoid calling kfree() under spinlock in dev_pm_put_subsys_data()
Fix dev_pm_put_subsys_data() so that it doesn't call kfree() under
a spinlock and make it return 1 whenever it leaves NULL
power.subsys_data (regardless of the reason).
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/common.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c index 39c32529b833..5da914041305 100644 --- a/drivers/base/power/common.c +++ b/drivers/base/power/common.c @@ -61,24 +61,24 @@ EXPORT_SYMBOL_GPL(dev_pm_get_subsys_data); int dev_pm_put_subsys_data(struct device *dev) { struct pm_subsys_data *psd; - int ret = 0; + int ret = 1; spin_lock_irq(&dev->power.lock); psd = dev_to_psd(dev); - if (!psd) { - ret = -EINVAL; + if (!psd) goto out; - } if (--psd->refcount == 0) { dev->power.subsys_data = NULL; - kfree(psd); - ret = 1; + } else { + psd = NULL; + ret = 0; } out: spin_unlock_irq(&dev->power.lock); + kfree(psd); return ret; } |