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-rw-r--r--drivers/usb/core/endpoint.c4
-rw-r--r--drivers/usb/core/hub.c18
-rw-r--r--drivers/usb/core/message.c50
-rw-r--r--drivers/usb/core/sysfs.c22
-rw-r--r--drivers/usb/core/usb.c37
-rw-r--r--drivers/usb/core/usb.h4
-rw-r--r--include/linux/usb.h2
7 files changed, 93 insertions, 44 deletions
diff --git a/drivers/usb/core/endpoint.c b/drivers/usb/core/endpoint.c
index 946fae43d62..e1710f260b4 100644
--- a/drivers/usb/core/endpoint.c
+++ b/drivers/usb/core/endpoint.c
@@ -276,7 +276,7 @@ static void ep_device_release(struct device *dev)
kfree(ep_dev);
}
-int usb_create_ep_files(struct device *parent,
+int usb_create_ep_devs(struct device *parent,
struct usb_host_endpoint *endpoint,
struct usb_device *udev)
{
@@ -340,7 +340,7 @@ exit:
return retval;
}
-void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
+void usb_remove_ep_devs(struct usb_host_endpoint *endpoint)
{
struct ep_device *ep_dev = endpoint->ep_dev;
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 5abdc11be1e..756b8d9993f 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1437,17 +1437,12 @@ void usb_disconnect(struct usb_device **pdev)
usb_disable_device(udev, 0);
usb_hcd_synchronize_unlinks(udev);
+ usb_remove_ep_devs(&udev->ep0);
usb_unlock_device(udev);
- /* Remove the device-specific files from sysfs. This must be
- * done with udev unlocked, because some of the attribute
- * routines try to acquire the device lock.
- */
- usb_remove_sysfs_dev_files(udev);
-
/* Unregister the device. The device driver is responsible
- * for removing the device files from usbfs and sysfs and for
- * de-configuring the device.
+ * for de-configuring the device and invoking the remove-device
+ * notifier chain (used by usbfs and possibly others).
*/
device_del(&udev->dev);
@@ -1654,8 +1649,8 @@ int usb_new_device(struct usb_device *udev)
announce_device(udev);
/* Register the device. The device driver is responsible
- * for adding the device files to sysfs and for configuring
- * the device.
+ * for configuring the device and invoking the add-device
+ * notifier chain (used by usbfs and possibly others).
*/
err = device_add(&udev->dev);
if (err) {
@@ -1663,8 +1658,7 @@ int usb_new_device(struct usb_device *udev)
goto fail;
}
- /* put device-specific files into sysfs */
- usb_create_sysfs_dev_files(udev);
+ (void) usb_create_ep_devs(&udev->dev, &udev->ep0, udev);
return err;
fail:
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index aadf29f09c4..7943901c641 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1004,6 +1004,34 @@ int usb_clear_halt(struct usb_device *dev, int pipe)
}
EXPORT_SYMBOL_GPL(usb_clear_halt);
+static int create_intf_ep_devs(struct usb_interface *intf)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct usb_host_interface *alt = intf->cur_altsetting;
+ int i;
+
+ if (intf->ep_devs_created || intf->unregistering)
+ return 0;
+
+ for (i = 0; i < alt->desc.bNumEndpoints; ++i)
+ (void) usb_create_ep_devs(&intf->dev, &alt->endpoint[i], udev);
+ intf->ep_devs_created = 1;
+ return 0;
+}
+
+static void remove_intf_ep_devs(struct usb_interface *intf)
+{
+ struct usb_host_interface *alt = intf->cur_altsetting;
+ int i;
+
+ if (!intf->ep_devs_created)
+ return;
+
+ for (i = 0; i < alt->desc.bNumEndpoints; ++i)
+ usb_remove_ep_devs(&alt->endpoint[i]);
+ intf->ep_devs_created = 0;
+}
+
/**
* usb_disable_endpoint -- Disable an endpoint by address
* @dev: the device whose endpoint is being disabled
@@ -1092,7 +1120,7 @@ void usb_disable_device(struct usb_device *dev, int skip_ep0)
dev_dbg(&dev->dev, "unregistering interface %s\n",
dev_name(&interface->dev));
interface->unregistering = 1;
- usb_remove_sysfs_intf_files(interface);
+ remove_intf_ep_devs(interface);
device_del(&interface->dev);
}
@@ -1235,8 +1263,10 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
*/
/* prevent submissions using previous endpoint settings */
- if (iface->cur_altsetting != alt)
+ if (iface->cur_altsetting != alt) {
+ remove_intf_ep_devs(iface);
usb_remove_sysfs_intf_files(iface);
+ }
usb_disable_interface(dev, iface);
iface->cur_altsetting = alt;
@@ -1272,9 +1302,10 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
* (Likewise, EP0 never "halts" on well designed devices.)
*/
usb_enable_interface(dev, iface);
- if (device_is_registered(&iface->dev))
+ if (device_is_registered(&iface->dev)) {
usb_create_sysfs_intf_files(iface);
-
+ create_intf_ep_devs(iface);
+ }
return 0;
}
EXPORT_SYMBOL_GPL(usb_set_interface);
@@ -1334,7 +1365,6 @@ int usb_reset_configuration(struct usb_device *dev)
struct usb_interface *intf = config->interface[i];
struct usb_host_interface *alt;
- usb_remove_sysfs_intf_files(intf);
alt = usb_altnum_to_altsetting(intf, 0);
/* No altsetting 0? We'll assume the first altsetting.
@@ -1345,10 +1375,16 @@ int usb_reset_configuration(struct usb_device *dev)
if (!alt)
alt = &intf->altsetting[0];
+ if (alt != intf->cur_altsetting) {
+ remove_intf_ep_devs(intf);
+ usb_remove_sysfs_intf_files(intf);
+ }
intf->cur_altsetting = alt;
usb_enable_interface(dev, intf);
- if (device_is_registered(&intf->dev))
+ if (device_is_registered(&intf->dev)) {
usb_create_sysfs_intf_files(intf);
+ create_intf_ep_devs(intf);
+ }
}
return 0;
}
@@ -1682,7 +1718,7 @@ free_interfaces:
dev_name(&intf->dev), ret);
continue;
}
- usb_create_sysfs_intf_files(intf);
+ create_intf_ep_devs(intf);
}
usb_autosuspend_device(dev);
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 0f0ccf64011..4cc2456ef3b 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -629,9 +629,6 @@ int usb_create_sysfs_dev_files(struct usb_device *udev)
struct device *dev = &udev->dev;
int retval;
- /* Unforunately these attributes cannot be created before
- * the uevent is broadcast.
- */
retval = device_create_bin_file(dev, &dev_bin_attr_descriptors);
if (retval)
goto error;
@@ -643,11 +640,7 @@ int usb_create_sysfs_dev_files(struct usb_device *udev)
retval = add_power_attributes(dev);
if (retval)
goto error;
-
- retval = usb_create_ep_files(dev, &udev->ep0, udev);
- if (retval)
- goto error;
- return 0;
+ return retval;
error:
usb_remove_sysfs_dev_files(udev);
return retval;
@@ -657,7 +650,6 @@ void usb_remove_sysfs_dev_files(struct usb_device *udev)
{
struct device *dev = &udev->dev;
- usb_remove_ep_files(&udev->ep0);
remove_power_attributes(dev);
remove_persist_attributes(dev);
device_remove_bin_file(dev, &dev_bin_attr_descriptors);
@@ -816,36 +808,24 @@ int usb_create_sysfs_intf_files(struct usb_interface *intf)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct usb_host_interface *alt = intf->cur_altsetting;
- int i;
int retval;
if (intf->sysfs_files_created || intf->unregistering)
return 0;
- /* The interface string may be present in some altsettings
- * and missing in others. Hence its attribute cannot be created
- * before the uevent is broadcast.
- */
if (alt->string == NULL)
alt->string = usb_cache_string(udev, alt->desc.iInterface);
if (alt->string)
retval = device_create_file(&intf->dev, &dev_attr_interface);
- for (i = 0; i < alt->desc.bNumEndpoints; ++i)
- usb_create_ep_files(&intf->dev, &alt->endpoint[i], udev);
intf->sysfs_files_created = 1;
return 0;
}
void usb_remove_sysfs_intf_files(struct usb_interface *intf)
{
- struct usb_host_interface *alt = intf->cur_altsetting;
- int i;
-
if (!intf->sysfs_files_created)
return;
- for (i = 0; i < alt->desc.bNumEndpoints; ++i)
- usb_remove_ep_files(&alt->endpoint[i]);
device_remove_file(&intf->dev, &dev_attr_interface);
intf->sysfs_files_created = 0;
}
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 4c98f3975af..c0821564a3f 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -971,6 +971,37 @@ int usb_disabled(void)
EXPORT_SYMBOL_GPL(usb_disabled);
/*
+ * Notifications of device and interface registration
+ */
+static int usb_bus_notify(struct notifier_block *nb, unsigned long action,
+ void *data)
+{
+ struct device *dev = data;
+
+ switch (action) {
+ case BUS_NOTIFY_ADD_DEVICE:
+ if (dev->type == &usb_device_type)
+ (void) usb_create_sysfs_dev_files(to_usb_device(dev));
+ else if (dev->type == &usb_if_device_type)
+ (void) usb_create_sysfs_intf_files(
+ to_usb_interface(dev));
+ break;
+
+ case BUS_NOTIFY_DEL_DEVICE:
+ if (dev->type == &usb_device_type)
+ usb_remove_sysfs_dev_files(to_usb_device(dev));
+ else if (dev->type == &usb_if_device_type)
+ usb_remove_sysfs_intf_files(to_usb_interface(dev));
+ break;
+ }
+ return 0;
+}
+
+static struct notifier_block usb_bus_nb = {
+ .notifier_call = usb_bus_notify,
+};
+
+/*
* Init
*/
static int __init usb_init(void)
@@ -987,6 +1018,9 @@ static int __init usb_init(void)
retval = bus_register(&usb_bus_type);
if (retval)
goto bus_register_failed;
+ retval = bus_register_notifier(&usb_bus_type, &usb_bus_nb);
+ if (retval)
+ goto bus_notifier_failed;
retval = usb_host_init();
if (retval)
goto host_init_failed;
@@ -1021,6 +1055,8 @@ driver_register_failed:
major_init_failed:
usb_host_cleanup();
host_init_failed:
+ bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
+bus_notifier_failed:
bus_unregister(&usb_bus_type);
bus_register_failed:
ksuspend_usb_cleanup();
@@ -1044,6 +1080,7 @@ static void __exit usb_exit(void)
usb_devio_cleanup();
usb_hub_cleanup();
usb_host_cleanup();
+ bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
bus_unregister(&usb_bus_type);
ksuspend_usb_cleanup();
}
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index 9fb195665fa..381eae90c3b 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -6,10 +6,10 @@ extern int usb_create_sysfs_dev_files(struct usb_device *dev);
extern void usb_remove_sysfs_dev_files(struct usb_device *dev);
extern int usb_create_sysfs_intf_files(struct usb_interface *intf);
extern void usb_remove_sysfs_intf_files(struct usb_interface *intf);
-extern int usb_create_ep_files(struct device *parent,
+extern int usb_create_ep_devs(struct device *parent,
struct usb_host_endpoint *endpoint,
struct usb_device *udev);
-extern void usb_remove_ep_files(struct usb_host_endpoint *endpoint);
+extern void usb_remove_ep_devs(struct usb_host_endpoint *endpoint);
extern void usb_enable_endpoint(struct usb_device *dev,
struct usb_host_endpoint *ep);
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 74d0b9990c7..e9d63562325 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -108,6 +108,7 @@ enum usb_interface_condition {
* (in probe()), bound to a driver, or unbinding (in disconnect())
* @is_active: flag set when the interface is bound and not suspended.
* @sysfs_files_created: sysfs attributes exist
+ * @ep_devs_created: endpoint child pseudo-devices exist
* @unregistering: flag set when the interface is being unregistered
* @needs_remote_wakeup: flag set when the driver requires remote-wakeup
* capability during autosuspend.
@@ -169,6 +170,7 @@ struct usb_interface {
enum usb_interface_condition condition; /* state of binding */
unsigned is_active:1; /* the interface is not suspended */
unsigned sysfs_files_created:1; /* the sysfs attributes exist */
+ unsigned ep_devs_created:1; /* endpoint "devices" exist */
unsigned unregistering:1; /* unregistration is in progress */
unsigned needs_remote_wakeup:1; /* driver requires remote wakeup */
unsigned needs_altsetting0:1; /* switch to altsetting 0 is pending */
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-26 18:53:32 +0000