The acpi_install_address_space_handler() is coupled with acpi_remove_address_space_handler() in ipmi module init/exit, but failed to remove the handler in acpi_ipmi_init() if the ipmi_smi_watcher_register() failed, so adding the removal of the address space handler in error path. Signed-off-by: Hanjun Guo <guohanjun@xxxxxxxxxx> --- drivers/acpi/acpi_ipmi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/acpi_ipmi.c b/drivers/acpi/acpi_ipmi.c index bbd00d9..a5fe292 100644 --- a/drivers/acpi/acpi_ipmi.c +++ b/drivers/acpi/acpi_ipmi.c @@ -597,9 +597,14 @@ static int __init acpi_ipmi_init(void) pr_warn("Can't register IPMI opregion space handle\n"); return -EINVAL; } + result = ipmi_smi_watcher_register(&driver_data.bmc_events); - if (result) + if (result) { + acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, + ACPI_ADR_SPACE_IPMI, + &acpi_ipmi_space_handler); pr_err("Can't register IPMI system interface watcher\n"); + } return result; } -- 1.7.12.4