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| author | Julia Lawall <Julia.Lawall@lip6.fr> | 2012-03-15 12:32:05 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2012-03-30 11:30:34 +0400 |
| commit | c80f5b31f3c55a197f5323b93d1e3553429a427e (patch) | |
| tree | 4cc2183ddf4ce79765bb6d02f3d6b9191f3bcbe5 /drivers/acpi/processor_driver.c | |
| parent | c6436f5a395d346e9f4892d7aeed4c3f99261f0f (diff) | |
| download | linux-c80f5b31f3c55a197f5323b93d1e3553429a427e.tar.xz | |
ACPI: processor_driver: add missing kfree
The function acpi_processor_add is stored in the ops.add field of a
acpi_driver structure. This function is then called in
acpi_bus_driver_init. On failure, this function clears the field
device->driver_data, but does not free its contents. Thus the free has to
be done by the add function. In acpi_processor_add, the corresponding
value is pr. This value is currently freed on failure before storing it in
device->driver_data, but not after. This free is added in the error
handling code at the end of the function. The per_cpu variable
processors is also cleared so that it does not refer to a dangling pointer.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/processor_driver.c')
| -rw-r--r-- | drivers/acpi/processor_driver.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index 8ae05ce18500..fce0066aa4a4 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -535,8 +535,8 @@ static int __cpuinit acpi_processor_add(struct acpi_device *device) return -ENOMEM; if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { - kfree(pr); - return -ENOMEM; + result = -ENOMEM; + goto err_free_pr; } pr->handle = device->handle; @@ -576,7 +576,7 @@ static int __cpuinit acpi_processor_add(struct acpi_device *device) dev = get_cpu_device(pr->id); if (sysfs_create_link(&device->dev.kobj, &dev->kobj, "sysdev")) { result = -EFAULT; - goto err_free_cpumask; + goto err_clear_processor; } /* @@ -594,9 +594,15 @@ static int __cpuinit acpi_processor_add(struct acpi_device *device) err_remove_sysfs: sysfs_remove_link(&device->dev.kobj, "sysdev"); +err_clear_processor: + /* + * processor_device_array is not cleared to allow checks for buggy BIOS + */ + per_cpu(processors, pr->id) = NULL; err_free_cpumask: free_cpumask_var(pr->throttling.shared_cpu_map); - +err_free_pr: + kfree(pr); return result; } |