This patch (as955) prevents the interface-related sysfs files and endpoint pseudo-devices from being deleted and recreated when a call to usb_set_interface() specifies the current altsetting. Since the altsetting doesn't get changed, there's no need to do anything.
Furthermore, avoiding changes to the endpoint devices will be necessary in the future. This code is called from usb_reset_device(), which gets invoked for reset-resume processing, but upcoming changes to the PM and driver cores will make it impossible to register devices while a suspend/resume transition is in progress. Since we don't need to re-register those endpoint devices anyhow, it's best to skip the whole thing. Signed-off-by: Alan Stern <[EMAIL PROTECTED]> --- Index: usb-2.6/drivers/usb/core/message.c =================================================================== --- usb-2.6.orig/drivers/usb/core/message.c +++ usb-2.6/drivers/usb/core/message.c @@ -1173,6 +1173,7 @@ int usb_set_interface(struct usb_device struct usb_host_interface *alt; int ret; int manual = 0; + int changed; if (dev->state == USB_STATE_SUSPENDED) return -EHOSTUNREACH; @@ -1212,7 +1213,8 @@ int usb_set_interface(struct usb_device */ /* prevent submissions using previous endpoint settings */ - if (device_is_registered(&iface->dev)) + changed = (iface->cur_altsetting != alt); + if (changed && device_is_registered(&iface->dev)) usb_remove_sysfs_intf_files(iface); usb_disable_interface(dev, iface); @@ -1249,7 +1251,7 @@ int usb_set_interface(struct usb_device * (Likewise, EP0 never "halts" on well designed devices.) */ usb_enable_interface(dev, iface); - if (device_is_registered(&iface->dev)) + if (changed && device_is_registered(&iface->dev)) usb_create_sysfs_intf_files(iface); return 0; ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel