On Fri, Sep 02, 2016 at 03:46:38PM +0800, Lv Zheng wrote: > When the handler installation failed, there was no code to free the > allocated EC device. This patch fixes this memory leakage issue. > > Link: https://bugzilla.kernel.org/show_bug.cgi?id=115021 > Reported-and-tested-by: Luya Tshimbalanga <luya@xxxxxxxxxxxxxxxxx> > Suggested-by: Peter Wu <peter@xxxxxxxxxxxxx> > Cc: Peter Wu <peter@xxxxxxxxxxxxx> > Cc: Luya Tshimbalanga <luya@xxxxxxxxxxxxxxxxx> > Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx> > --- > drivers/acpi/ec.c | 14 ++++++++++---- > 1 file changed, 10 insertions(+), 4 deletions(-) > > diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c > index 4a5f3ab..4b4c0cb 100644 > --- a/drivers/acpi/ec.c > +++ b/drivers/acpi/ec.c > @@ -1438,22 +1438,25 @@ static int acpi_ec_add(struct acpi_device *device) > return -ENOMEM; > if (ec_parse_device(device->handle, 0, ec, NULL) != > AE_CTRL_TERMINATE) { > - acpi_ec_free(ec); > - return -EINVAL; > + ret = -EINVAL; > + goto error; > } > > /* Find and register all query methods */ > acpi_walk_namespace(ACPI_TYPE_METHOD, ec->handle, 1, > acpi_ec_register_query_methods, NULL, ec, NULL); I think you should call acpi_ec_remove_query_handlers too if at this point acpi_config_boot_ec fails. Peter > > + ret = acpi_config_boot_ec(ec, false); > + if (ret) > + goto error; > + > device->driver_data = ec; > > ret = !!request_region(ec->data_addr, 1, "EC data"); > WARN(!ret, "Could not request EC data io port 0x%lx", ec->data_addr); > ret = !!request_region(ec->command_addr, 1, "EC cmd"); > WARN(!ret, "Could not request EC cmd io port 0x%lx", ec->command_addr); > - > - ret = acpi_config_boot_ec(ec, false); > + ret = 0; > > /* Reprobe devices depending on the EC */ > acpi_walk_dep_device_list(ec->handle); > @@ -1464,6 +1467,9 @@ static int acpi_ec_add(struct acpi_device *device) > /* Clear stale _Q events if hardware might require that */ > if (EC_FLAGS_CLEAR_ON_RESUME) > acpi_ec_clear(ec); > +error: > + if (ret) > + acpi_ec_free(ec); > return ret; > } > > -- > 1.7.10 > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
