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| author | Pallipadi, Venkatesh <venkatesh.pallipadi@intel.com> | 2009-06-19 17:14:59 -0700 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-06-20 00:50:52 -0400 |
| commit | 7b768f07dce463a054c9dd84862d15ccc3d2b712 (patch) | |
| tree | 1c7a2509e1bca6718fd29e897f44b648089f728b /arch | |
| parent | 07a2039b8eb0af4ff464efd3dfd95de5c02648c6 (diff) | |
| download | linux-3.10-7b768f07dce463a054c9dd84862d15ccc3d2b712.tar.gz linux-3.10-7b768f07dce463a054c9dd84862d15ccc3d2b712.tar.bz2 linux-3.10-7b768f07dce463a054c9dd84862d15ccc3d2b712.zip | |
ACPI: pdc init related memory leak with physical CPU hotplug
arch_acpi_processor_cleanup_pdc() in x86 and ia64 results in memory allocated
for _PDC objects that is never freed and will cause memory leak in case of
physical CPU remove and add. Patch fixes the memory leak by freeing the
objects soon after _PDC is evaluated.
Reported-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/ia64/kernel/acpi-processor.c | 12 | ||||
| -rw-r--r-- | arch/x86/kernel/acpi/processor.c | 13 |
2 files changed, 25 insertions, 0 deletions
diff --git a/arch/ia64/kernel/acpi-processor.c b/arch/ia64/kernel/acpi-processor.c index cbe6cee5a55..dbda7bde611 100644 --- a/arch/ia64/kernel/acpi-processor.c +++ b/arch/ia64/kernel/acpi-processor.c @@ -71,3 +71,15 @@ void arch_acpi_processor_init_pdc(struct acpi_processor *pr) } EXPORT_SYMBOL(arch_acpi_processor_init_pdc); + +void arch_acpi_processor_cleanup_pdc(struct acpi_processor *pr) +{ + if (pr->pdc) { + kfree(pr->pdc->pointer->buffer.pointer); + kfree(pr->pdc->pointer); + kfree(pr->pdc); + pr->pdc = NULL; + } +} + +EXPORT_SYMBOL(arch_acpi_processor_cleanup_pdc); diff --git a/arch/x86/kernel/acpi/processor.c b/arch/x86/kernel/acpi/processor.c index 7c074eec39f..d296f4a195c 100644 --- a/arch/x86/kernel/acpi/processor.c +++ b/arch/x86/kernel/acpi/processor.c @@ -72,6 +72,7 @@ static void init_intel_pdc(struct acpi_processor *pr, struct cpuinfo_x86 *c) return; } + /* Initialize _PDC data based on the CPU vendor */ void arch_acpi_processor_init_pdc(struct acpi_processor *pr) { @@ -85,3 +86,15 @@ void arch_acpi_processor_init_pdc(struct acpi_processor *pr) } EXPORT_SYMBOL(arch_acpi_processor_init_pdc); + +void arch_acpi_processor_cleanup_pdc(struct acpi_processor *pr) +{ + if (pr->pdc) { + kfree(pr->pdc->pointer->buffer.pointer); + kfree(pr->pdc->pointer); + kfree(pr->pdc); + pr->pdc = NULL; + } +} + +EXPORT_SYMBOL(arch_acpi_processor_cleanup_pdc); |