From 512f64d9f7467597388ffbd5a21589ee3f375d8b Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Thu, 23 Jul 2015 15:08:41 +0300 Subject: mei: bus: add reference to bus device in struct mei_cl_client Add reference to the bus device (mei_device) for easier access. To ensures that referencing cldev->bus is valid during cldev life time we increase the bus ref counter on a client device creation and drop it on the device release. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/bus.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'drivers/misc/mei') diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 1d9ce9c491cf..963731eb4383 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -590,6 +590,20 @@ static struct bus_type mei_cl_bus_type = { .uevent = mei_cl_device_uevent, }; +static struct mei_device *mei_dev_bus_get(struct mei_device *bus) +{ + if (bus) + get_device(bus->dev); + + return bus; +} + +static void mei_dev_bus_put(struct mei_device *bus) +{ + if (bus) + put_device(bus->dev); +} + static void mei_cl_dev_release(struct device *dev) { struct mei_cl_device *cldev = to_mei_cl_device(dev); @@ -598,6 +612,7 @@ static void mei_cl_dev_release(struct device *dev) return; mei_me_cl_put(cldev->me_cl); + mei_dev_bus_put(cldev->bus); kfree(cldev); } @@ -641,6 +656,7 @@ struct mei_cl_device *mei_cl_add_device(struct mei_device *bus, cldev->dev.parent = bus->dev; cldev->dev.bus = &mei_cl_bus_type; cldev->dev.type = &mei_cl_device_type; + cldev->bus = mei_dev_bus_get(bus); strlcpy(cldev->name, name, sizeof(cldev->name)); @@ -650,6 +666,7 @@ struct mei_cl_device *mei_cl_add_device(struct mei_device *bus, if (status) { dev_err(bus->dev, "Failed to register MEI device\n"); mei_me_cl_put(cldev->me_cl); + mei_dev_bus_put(bus); kfree(cldev); return NULL; } -- cgit v1.2.3