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greybus: control: return error pointer when failing to create control device

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Return an error pointer when failing to create a control device.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Johan Hovold 2016-04-13 19:19:05 +02:00 committed by Greg Kroah-Hartman
parent 7c8eb12dbb
commit b6147e4fb1
2 changed files with 12 additions and 7 deletions
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13
drivers/staging/greybus/control.c
View File

@ -257,23 +257,26 @@ struct device_type greybus_control_type = {
struct gb_control *gb_control_create(struct gb_interface *intf)
{
struct gb_connection *connection;
struct gb_control *control;
control = kzalloc(sizeof(*control), GFP_KERNEL);
if (!control)
return NULL;
return ERR_PTR(-ENOMEM);
control->intf = intf;
control->connection = gb_connection_create_control(intf);
if (IS_ERR(control->connection)) {
connection = gb_connection_create_control(intf);
if (IS_ERR(connection)) {
dev_err(&intf->dev,
"failed to create control connection: %ld\n",
PTR_ERR(control->connection));
PTR_ERR(connection));
kfree(control);
return NULL;
return ERR_CAST(connection);
}
control->connection = connection;
control->dev.parent = &intf->dev;
control->dev.bus = &greybus_bus_type;
control->dev.type = &greybus_control_type;

6
drivers/staging/greybus/interface.c
View File

@ -381,6 +381,7 @@ struct device_type greybus_interface_type = {
struct gb_interface *gb_interface_create(struct gb_host_device *hd,
u8 interface_id)
{
struct gb_control *control;
struct gb_interface *intf;
intf = kzalloc(sizeof(*intf), GFP_KERNEL);
@ -403,11 +404,12 @@ struct gb_interface *gb_interface_create(struct gb_host_device *hd,
device_initialize(&intf->dev);
dev_set_name(&intf->dev, "%d-%d", hd->bus_id, interface_id);
intf->control = gb_control_create(intf);
if (!intf->control) {
control = gb_control_create(intf);
if (IS_ERR(control)) {
put_device(&intf->dev);
return NULL;
}
intf->control = control;
list_add(&intf->links, &hd->interfaces);