ACPI / Battery: avoid acpi_battery_add() use-after-free
When acpi_battery_add_fs() fails the error handling code does not clean up completely. Moreover, it does not return resulting in a use-after-free. Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NLen Brown <len.brown@intel.com>
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