From cc85e93342c030f8ba07f572afa159ec4518231f Mon Sep 17 00:00:00 2001 From: Bastian Blank Date: Wed, 29 Jun 2011 14:39:26 +0200 Subject: xen: Populate xenbus device attributes The xenbus bus type uses device_create_file to assign all used device attributes. However it does not remove them when the device goes away. This patch uses the dev_attrs field of the bus type to specify default attributes for all devices. Signed-off-by: Bastian Blank Acked-by: Ian Campbell Signed-off-by: Konrad Rzeszutek Wilk --- drivers/xen/xenbus/xenbus_probe.c | 41 ++++++++++-------------------- drivers/xen/xenbus/xenbus_probe.h | 2 ++ drivers/xen/xenbus/xenbus_probe_backend.c | 6 +---- drivers/xen/xenbus/xenbus_probe_frontend.c | 6 +---- 4 files changed, 18 insertions(+), 37 deletions(-) (limited to 'drivers/xen') diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c index 739769551e33..2ed0b045c69a 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -378,26 +378,31 @@ static void xenbus_dev_release(struct device *dev) kfree(to_xenbus_device(dev)); } -static ssize_t xendev_show_nodename(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t nodename_show(struct device *dev, + struct device_attribute *attr, char *buf) { return sprintf(buf, "%s\n", to_xenbus_device(dev)->nodename); } -static DEVICE_ATTR(nodename, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_nodename, NULL); -static ssize_t xendev_show_devtype(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t devtype_show(struct device *dev, + struct device_attribute *attr, char *buf) { return sprintf(buf, "%s\n", to_xenbus_device(dev)->devicetype); } -static DEVICE_ATTR(devtype, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_devtype, NULL); -static ssize_t xendev_show_modalias(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t modalias_show(struct device *dev, + struct device_attribute *attr, char *buf) { return sprintf(buf, "xen:%s\n", to_xenbus_device(dev)->devicetype); } -static DEVICE_ATTR(modalias, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_modalias, NULL); + +struct device_attribute xenbus_dev_attrs[] = { + __ATTR_RO(nodename), + __ATTR_RO(devtype), + __ATTR_RO(modalias), + __ATTR_NULL +}; +EXPORT_SYMBOL_GPL(xenbus_dev_attrs); int xenbus_probe_node(struct xen_bus_type *bus, const char *type, @@ -449,25 +454,7 @@ int xenbus_probe_node(struct xen_bus_type *bus, if (err) goto fail; - err = device_create_file(&xendev->dev, &dev_attr_nodename); - if (err) - goto fail_unregister; - - err = device_create_file(&xendev->dev, &dev_attr_devtype); - if (err) - goto fail_remove_nodename; - - err = device_create_file(&xendev->dev, &dev_attr_modalias); - if (err) - goto fail_remove_devtype; - return 0; -fail_remove_devtype: - device_remove_file(&xendev->dev, &dev_attr_devtype); -fail_remove_nodename: - device_remove_file(&xendev->dev, &dev_attr_nodename); -fail_unregister: - device_unregister(&xendev->dev); fail: kfree(xendev); return err; diff --git a/drivers/xen/xenbus/xenbus_probe.h b/drivers/xen/xenbus/xenbus_probe.h index 888b9900ca08..b814935378c7 100644 --- a/drivers/xen/xenbus/xenbus_probe.h +++ b/drivers/xen/xenbus/xenbus_probe.h @@ -48,6 +48,8 @@ struct xen_bus_type struct bus_type bus; }; +extern struct device_attribute xenbus_dev_attrs[]; + extern int xenbus_match(struct device *_dev, struct device_driver *_drv); extern int xenbus_dev_probe(struct device *_dev); extern int xenbus_dev_remove(struct device *_dev); diff --git a/drivers/xen/xenbus/xenbus_probe_backend.c b/drivers/xen/xenbus/xenbus_probe_backend.c index 6cf467bf63ec..ec510e562820 100644 --- a/drivers/xen/xenbus/xenbus_probe_backend.c +++ b/drivers/xen/xenbus/xenbus_probe_backend.c @@ -183,10 +183,6 @@ static void frontend_changed(struct xenbus_watch *watch, xenbus_otherend_changed(watch, vec, len, 0); } -static struct device_attribute xenbus_backend_dev_attrs[] = { - __ATTR_NULL -}; - static struct xen_bus_type xenbus_backend = { .root = "backend", .levels = 3, /* backend/type// */ @@ -200,7 +196,7 @@ static struct xen_bus_type xenbus_backend = { .probe = xenbus_dev_probe, .remove = xenbus_dev_remove, .shutdown = xenbus_dev_shutdown, - .dev_attrs = xenbus_backend_dev_attrs, + .dev_attrs = xenbus_dev_attrs, }, }; diff --git a/drivers/xen/xenbus/xenbus_probe_frontend.c b/drivers/xen/xenbus/xenbus_probe_frontend.c index b6a2690c9d49..ed2ba474a560 100644 --- a/drivers/xen/xenbus/xenbus_probe_frontend.c +++ b/drivers/xen/xenbus/xenbus_probe_frontend.c @@ -81,10 +81,6 @@ static void backend_changed(struct xenbus_watch *watch, xenbus_otherend_changed(watch, vec, len, 1); } -static struct device_attribute xenbus_frontend_dev_attrs[] = { - __ATTR_NULL -}; - static const struct dev_pm_ops xenbus_pm_ops = { .suspend = xenbus_dev_suspend, .resume = xenbus_dev_resume, @@ -106,7 +102,7 @@ static struct xen_bus_type xenbus_frontend = { .probe = xenbus_dev_probe, .remove = xenbus_dev_remove, .shutdown = xenbus_dev_shutdown, - .dev_attrs = xenbus_frontend_dev_attrs, + .dev_attrs = xenbus_dev_attrs, .pm = &xenbus_pm_ops, }, -- cgit v1.2.3