From: lily <floridsleeves@xxxxxxxxx> Check return value from acpi_evaluate_dsm(). Only do ACPI_FREE() when out_obj is not NULL pointers. Signed-off-by: Li Zhong <floridsleeves@xxxxxxxxx> --- drivers/acpi/x86/s2idle.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c index f9ac12b778e6..1b449d3cfbf7 100644 --- a/drivers/acpi/x86/s2idle.c +++ b/drivers/acpi/x86/s2idle.c @@ -328,7 +328,8 @@ static void acpi_sleep_run_lps0_dsm(unsigned int func, unsigned int func_mask, g out_obj = acpi_evaluate_dsm(lps0_device_handle, &dsm_guid, rev_id, func, NULL); - ACPI_FREE(out_obj); + if (!out_obj) + ACPI_FREE(out_obj); acpi_handle_debug(lps0_device_handle, "_DSM function %u evaluation %s\n", func, out_obj ? "successful" : "failed"); -- 2.25.1
