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authorAlan Stern <stern@rowland.harvard.edu>2005-10-24 15:33:03 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2005-10-28 16:47:51 -0700
commit0e6c8e8db508fcb292836b23d039649c5de29090 (patch)
tree5a65aa48c6dbc5c81d1665802d4e632c64b850e3 /drivers/usb
parentbe69e5b1900a19a545becda822b18d6f09168ba5 (diff)
downloadop-kernel-dev-0e6c8e8db508fcb292836b23d039649c5de29090.zip
op-kernel-dev-0e6c8e8db508fcb292836b23d039649c5de29090.tar.gz
[PATCH] usbcore: endpoint attributes track altsetting changes
This patch (as588) fixes the way endpoint attribute files are registered and unregistered. Now they will correctly track along with altsetting changes. This fixes bugzilla entry #5467. In a separate but related change, when a usb_reset_configuration call fails, the device state is not changed to USB_STATE_ADDRESS. In the first place, failure means that we don't know what the state is, not that we know the device is unconfigured. In the second place, doing this can potentially lead to a memory leak, since usbcore might not realize there still is a current configuration that needs to be destroyed. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/core/message.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 574d0d4..5ad0d5e 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1149,6 +1149,8 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
*/
/* prevent submissions using previous endpoint settings */
+ if (device_is_registered(&iface->dev))
+ usb_remove_sysfs_intf_files(iface);
usb_disable_interface(dev, iface);
iface->cur_altsetting = alt;
@@ -1184,6 +1186,8 @@ 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))
+ usb_create_sysfs_intf_files(iface);
return 0;
}
@@ -1233,10 +1237,8 @@ int usb_reset_configuration(struct usb_device *dev)
USB_REQ_SET_CONFIGURATION, 0,
config->desc.bConfigurationValue, 0,
NULL, 0, USB_CTRL_SET_TIMEOUT);
- if (retval < 0) {
- usb_set_device_state(dev, USB_STATE_ADDRESS);
+ if (retval < 0)
return retval;
- }
dev->toggle[0] = dev->toggle[1] = 0;
@@ -1245,6 +1247,8 @@ int usb_reset_configuration(struct usb_device *dev)
struct usb_interface *intf = config->interface[i];
struct usb_host_interface *alt;
+ if (device_is_registered(&intf->dev))
+ usb_remove_sysfs_intf_files(intf);
alt = usb_altnum_to_altsetting(intf, 0);
/* No altsetting 0? We'll assume the first altsetting.
@@ -1257,6 +1261,8 @@ int usb_reset_configuration(struct usb_device *dev)
intf->cur_altsetting = alt;
usb_enable_interface(dev, intf);
+ if (device_is_registered(&intf->dev))
+ usb_create_sysfs_intf_files(intf);
}
return 0;
}
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