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2006-09-27USB Storage: add rio karma eject supportMatthew Dharm9-75/+190
This changeset from Keith Bennett (via Bob Copeland) moves the Karma initializer to its own file and adds trapping of the START_STOP command to enable eject of the device. Signed-off-by: Keith Bennett <keith@mcs.st-and.ac.uk> Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usb-skeleton: small updateLuiz Fernando N. Capitulino1-28/+22
o CodingStyle fixes o Removes trailing spaces o Do not make not needed initialiation of automatic variables o Use usb_endpoint_* functions o If we get an error in the write URB callback print an error message instead of a debug one (Pretty unrelated changes, but spliting this up doesn't pay off as our main changes are just CodingStyle fixes). Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usbcore: khubd and busy-port handlingAlan Stern2-2/+12
We don't want khubd to start interfering in the device-resume process merely because the PORT_STATUS_C_SUSPEND feature happens to be set. Ports need to be marked as busy while a resume is taking place. In addition, so long as ports are marked as busy, khubd won't be able to clear their various status-change features. On an interrupt-driven root hub this could lead to an interrupt storm. Root hub IRQs should not be re-enabled until the busy_bits value is equal to 0. This patch (as765) fixes these two potential problems. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usbcore: make hcd_endpoint_disable wait for queue to drainAlan Stern1-30/+35
The inconsistent lock state problem in usbcore (the one that shows up when an HCD is unloaded) comes down to two inter-related problems: usb_rh_urb_dequeue() isn't set up to be called with interrupts disabled. hcd_endpoint_disable() doesn't wait for all URBs on the endpoint's queue to complete. The two problems are related because the one type of URB that isn't likely to be complete when hcd_endpoint_disable() returns is a root-hub URB. Right now usb_rh_urb_dequeue() waits for them to complete, and it assumes interrupts are enabled so it can wait. But hcd_endpoint_disable() calls it with interrupts disabled. Now, it should be legal to unlink root-hub URBs with interrupts disabled. The solution is to move the waiting into hcd_endpoint_disable(), where it belongs. This patch (as754) does that. It turns out to be completely safe to replace the del_timer_sync() with a simple del_timer(). It doesn't matter if the timer routine is running; hcd_root_hub_lock will synchronize the two threads and the status URB will complete with an unlink error, as it should. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27UHCI: increase Resume-Detect-off delayAlan Stern1-3/+9
The UHCI controller in my laptop takes longer to turn off the Resume-Detect bit than the 4 us allowed by uhci-hcd. Presumably other computers will have the same problem. This patch (as752) increases the maximum delay to 10 us, which should be plenty, and uses polling to avoid penalizing systems which can turn the bit off more quickly. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: Properly unregister reboot notifier in case of failure in ehci hcdAleksey Gorelov20-23/+69
If some problem occurs during ehci startup, for instance, request_irq fails, echi hcd driver tries it best to cleanup, but fails to unregister reboot notifier, which in turn leads to crash on reboot/poweroff. The following patch resolves this problem by not using reboot notifiers anymore, but instead making ehci/ohci driver get its own shutdown method. For PCI, it is done through pci glue, for everything else through platform driver glue. One downside: sa1111 does not use platform driver stuff, and does not have its own shutdown hook, so no 'shutdown' is called for it now. I'm not sure if it is really necessary on that platform, though. Signed-off-by: Aleks Gorelov <dared1st@yahoo.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB gadget: gadgetfs dont try to lock before freeMilan Svoboda1-1/+0
I spotted this during my tests with -rt on arm. The -rt patch contains some better tools to diagnose problems with locks and some other things... Original code tries to take semaphore in BUG_ON and then free the memory with this semaphore. Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: add poll to gadgetfs's endpoint zeroMilan Svoboda1-1/+31
Add poll() support to gadgetfs ep0 Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: net1080 inherent pad lengthdave rientjes1-8/+7
The size of struct nc_trailer is inherently the newtailroom pad. Signed-off-by: David Rientjes <rientjes@google.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: ldusb: Use usb_endpoint_* functions.Luiz Fernando N. Capitulino1-6/+2
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: usblcd: Use usb_endpoint_* functions.Luiz Fernando N. Capitulino1-6/+2
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: usb-serial: Use usb_endpoint_* functions.Luiz Fernando N. Capitulino1-12/+7
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: powermate: Use usb_endpoint_* functions.Luiz Fernando N. Capitulino1-3/+1
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: keyspan_remote: Use usb_endpoint_* functions.Luiz Fernando N. Capitulino1-2/+1
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: ati_remote: Use usb_endpoint_* functions.Luiz Fernando N. Capitulino1-6/+2
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: acecad: Use usb_endpoint_* functions.Luiz Fernando N. Capitulino1-4/+1
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: appletouch: Use usb_endpoint_* functions.Luiz Fernando N. Capitulino1-4/+1
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: hub: Use usb_endpoint_* functions.Luiz Fernando N. Capitulino1-7/+2
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: usblp: Use usb_endpoint_* functions.Luiz Fernando N. Capitulino1-7/+2
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: New functions to check endpoints info.Luiz Fernando N. Capitulino2-0/+158
These functions makes USB driver's code simpler when dealing with endpoints by avoiding them from accessing the endpoint's descriptor structure directly when they only need to know the endpoint's transfer type and/or direction. Please, read each functions' documentation in order to know how to use them. Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: making the kernel -Wshadow clean - USB & completionJesper Juhl1-9/+9
include/linux/usb.h causes a lot of -Wshadow warnings - fix them. include/linux/usb.h:901: warning: declaration of 'complete' shadows a global declaration include/linux/completion.h:52: warning: shadowed declaration is here include/linux/usb.h:932: warning: declaration of 'complete' shadows a global declaration include/linux/completion.h:52: warning: shadowed declaration is here include/linux/usb.h:967: warning: declaration of 'complete' shadows a global declaration include/linux/completion.h:52: warning: shadowed declaration is here Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: Make file operations structs in drivers/usb const.Luiz Fernando N. Capitulino24-33/+33
Making structs const prevents accidental bugs and with the proper debug options they're protected against corruption. Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: gmidi: New USB MIDI Gadget class driver.Ben Williamson5-0/+1518
This driver is glue between the USB gadget interface and the ALSA MIDI interface. It allows us to appear as a MIDI Streaming device to a host system on the other end of a USB cable. This includes linux/usb/audio.h and linux/usb/midi.h containing definitions from the relevant USB specifications for USB audio and USB MIDI devices. The following changes have been made since the first RFC posting: * Bug fixes to endpoint handling. * Workaround for USB_REQ_SET_CONFIGURATION handling, not understood yet. * Added SND and SND_RAWMIDI dependencies in Kconfig. * Moved usb_audio.h and usb_midi.h to usb/*.h * Added module parameters for ALSA card index and id. * Added module parameters for USB descriptor IDs and strings. * Removed some unneeded stuff inherited from zero.c, more to go. * Provide DECLARE_* macros for the variable-length structs. * Use kmalloc instead of usb_ep_alloc_buffer. * Limit source to 80 columns. * Return actual error code instead of -ENOMEM in a few places. Signed-off-by: Ben Williamson <ben.williamson@greyinnovation.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: gadgetfs: protect ep_release with lockMilan Svoboda1-0/+5
This patch adds mutex protection to ep_release. Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: fix ep_config to return correct valueMilan Svoboda1-3/+4
This patch fixes ep_config to return correct value. Without patch ep_config returns submitted lenght minus 4 on succes. With this patch applied, whole submitted lenght is returned. ep_config parses submitted data and if buffer starts with (int) 1 it is parsed, otherwise error is reported. Problem is that ep_config returns size of buffer minus 4 on success. I think that size of buffer should be returned instead, because there were no problems and all data were processed. Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: correct locking in gadgetfs_disconnectMilan Svoboda1-2/+3
This patch moves spin_lock (&dev->lock) before first use of dev. I think that test to the state of device should be protected with this spin_lock... Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: onetouch - handle errors from input_register_device()Dmitry Torokhov1-2/+6
Onetouch: handle errors from input_register_device() Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: build fixes: ohci-omapDavid Brownell1-42/+71
The ohci-omap code has diverged from the working version in the linux-omap tree; this syncs up the versions: - Another clock is needed in various cases - The omap-1510 iommu code needs to be #ifdeffed out on newer parts - Saner use of the HCD framework - Various other changes, e.g. a Nokia 770 quirk And some minor dead-whitespace removal. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: garmin_gps support for new generation of gps receiversHermann Kneissel1-57/+162
The attached patch adds support for the new generation of gps receivers (eg. GPSmap 60Cx) to garmin_gps.c. Signed-off-by: Hermann Kneissel <herkne@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: wacom tablet driver reorganizationPing Cheng6-1003/+1142
- split wacom.c into 4 files: wacom.h, wacom_wac.h, wacom_sys.c, and wacom_wac.c - where wacom_sys.c deals with system specific code, - and wacom_wac.c deals with Wacom specific code Signed-off-by: Ping Cheng <pingc@wacom.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: usbcore get rid of the timer in usb_start_wait_urb()Franck Bui-Huu1-44/+29
This patch uses completion timeout instead of a timer to implement a timeout when submitting an URB in usb_start_wait_urb(). It also fixes a small issue. With the previous code, if no timeout happened and the URB's status was set to ECONNRESET value, the code assumed wrongly that a timeout had occured. Signed-off-by: Franck Bui-Huu <vagabon.xyz@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: ipaq: minor ipaq_open() cleanup.Luiz Fernando N. Capitulino1-15/+23
Commit b512504e5671f83638be0ddr085c4b1832f623d3 made ipaq_open() a bit messy by moving the read urb submission far from its usb_fill_bulk_urb() call and the comment explaining what it does. This patch put they together again. Although only compiled tested, should not break the fix introduced by b512504e5671f83638be0ddr085c4b1832f623d3, of course. Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usbnet: printk format warningRandy Dunlap1-1/+1
Fix printk format warning(s): drivers/usb/net/usbnet.c:654: warning: int format, different type arg (arg 3) The fact that rx_urb_size happens to be a size_t has propagated all the way back to this printk. It's fragile to be using %z in this case - let's just typecast the args instead. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: asix - Add AX88178 support and many other changesDavid Hollis1-232/+769
* More generi-fication of function/macro names where appropriate: ax88772_xx() -> asix_xx() * Reorder functions to provide more logical grouping * AX88178 device support * Support DLink DUB-E100 Rev B Support * Hopefully resolve all endian-ness issues * Use more defines for bitmask values * Change a number of devdbg() calls to deverr() so that if DEBUG is not defined, the error messages still get through as necessary Signed-off-by: David Hollis <dhollis@davehollis.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: usbnet - Add unlink_rx_urbs() call to allow for Jumbo FramesJamie Painter2-3/+28
Add usbnet_unlink_rx_urbs() which can be called by mini-drivers when they change their MTU such as for Jumbo Frame support. Signed-off-by: David Hollis <dhollis@davehollis.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: pl2303: cosmetic changes to quirkThiago Galesi1-6/+13
Cosmetic changes to quirk in pl2303_update_line_status Signed-off-by: Thiago Galesi <thiagogalesi@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: pl2303: reduce number of prototypesThiago Galesi1-301/+269
Reduce number of needed prototypes in Prolific pl2303 driver Signed-off-by: Thiago Galesi <thiagogalesi@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: pl2303: cosmetic changes to pl2303_buf_{clear, data_avail}Thiago Galesi1-6/+6
Changes the functions pl2303_buf_clear and pl2303_buf_data_avail for the purpose of keeping them under the 80 column limit, making them more similar to similar functions and making then simpler. Signed-off-by: Thiago Galesi <thiagogalesi@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: pl2303: remove 80-columns limit violations in pl2303 driverThiago Galesi1-129/+123
Fixes several lines that overrun 80 columns in Prolific pl2303 driver and cleans up some space usages in the function calls. Signed-off-by: Thiago Galesi <thiagogalesi@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27USB: pl2303: Removes unneeded goto.Luiz Fernando N. Capitulino1-4/+1
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usbtouchscreen: version 0.4Daniel Ritz2-84/+219
changes over 0.3: - some more eGalax device IDs (from eGalax driver/spec) - return the error code in probe() - 3M/MTouch init fixes, tested by Don Alexander - eGalax fixes for bugs in multi-packet handling, spottet by Pieter Grimmerink - support for some eTurboTouch devices, mostly by Pieter Grimmerink - support for Gunze AHL61 controller (untested, but simple enough) Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch> Cc: Pieter Grimmerink <p.grimmerink@inepro.com> Cc: Don Alexander <debug@roosoft.ltd.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27hub driver: improve use of #ifdefAlan Stern2-18/+57
This patch (as736) makes the hub driver more readable by improving the usage of "#ifdef CONFIG_PM" and "#ifdef CONFIG_USB_SUSPEND". Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usbcore: suspending devices with no driverAlan Stern1-4/+15
Since usb_generic can be unbound from a USB device, we need to be able to handle the possibility that a suspend or resume request arrives for a device with no driver. This patch (as735) arranges things so that resume requests will fail and suspend requests will use the standard USB port-suspend code. Attempts to suspend or resume an unbound interface are handled similarly (although the error caused by trying to resume an unbound interface is dropped by the calling routine). Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usbcore: fix up device and power state testsAlan Stern3-61/+29
This patch (as734) rationalizes the various tests of device state and power states. There are duplications and mistaken tests in several places. Perhaps the most interesting challenge is where the hub driver tests to see that all the child devices are suspended before allowing itself to be suspended. When CONFIG_USB_SUSPEND is set the test is straightforward, since we expect that the children _will_ be suspended. But when CONFIG_USB_SUSPEND isn't set, it's not so clear what should be done. The code compromises by checking the child's power.power_state.event field. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usbcore: set device and power states properlyAlan Stern2-35/+46
This patch (as733) fixes up the places where device states and power states are set in usbcore. Right now things are duplicated or missing; this should straighten things out. The idea is that udev->state is USB_STATE_SUSPENDED exactly when the device's upstream port has been suspended, whereas udev->dev.power.power_state.event reflects the result of the last call to the suspend/resume routines (which might not actually change the device state, especially if CONFIG_USB_SUSPEND isn't set). Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usbcore: track whether interfaces are suspendedAlan Stern2-3/+6
Currently we rely on intf->dev.power.power_state.event for tracking whether intf is suspended. This is not a reliable technique because that value is owned by the PM core, not by usbcore. This patch (as718b) adds a new flag so that we can accurately tell which interfaces are suspended and which aren't. At first one might think these flags aren't needed, since interfaces will be suspended along with their devices. It turns out there are a couple of intermediate situations where that's not quite true, such as while processing a remote-wakeup request. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usbcore: resume device resume recursionAlan Stern4-105/+70
This patch (as717b) removes the existing recursion in hub resume code: Resuming a hub will no longer automatically resume the devices attached to the hub. At the same time, it adds one level of recursion: Suspending a USB device will automatically suspend all the device's interfaces. Failure at an intermediate stage will cause all the already-suspended interfaces to be resumed. Attempts to suspend or resume an interface by itself will do nothing, although they won't return an error. Thus the regular system-suspend and system-resume procedures should continue to work as before; only runtime PM will be affected. The patch also removes the code that tests state of the interfaces before suspending a device. It's no longer needed, since everything gets suspended together. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usbcore: split suspend/resume for device and interfacesAlan Stern1-45/+77
This patch (as716b) splits up the core suspend and resume routines into two parts each: one for handling devices and one for handling interfaces. The behavior of the parts should be the same as in the old unified code. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usbcore: make usb_generic a usb_device_driverAlan Stern4-186/+232
This patch (as714b) makes usb_generic into a usb_device_driver capable of being probed and unbound, just like other drivers. A fair amount of the work that used to get done during discovery or removal of a USB device have been moved to the probe and disconnect methods of usb_generic: creating the sysfs attributes and selecting an initial configuration. However the normal behavior should continue to be the same as before. We will now have the possibility of creating other USB device drivers, They will assist with exporting devices to remote systems (USB-over-TCPIP) or to paravirtual guest operating systems. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-27usbcore: add usb_device_driver definitionAlan Stern5-84/+245
This patch (as732) adds a usb_device_driver structure, for representing drivers that manage an entire USB device as opposed to just an interface. Support routines like usb_register_device_driver, usb_deregister_device_driver, usb_probe_device, and usb_unbind_device are also added. Unlike an earlier version of this patch, the new code is type-safe. To accomplish this, the existing struct driver embedded in struct usb_driver had to be wrapped in an intermediate wrapper. This enables the core to tell at runtime whether a particular struct driver belongs to a device driver or to an interface driver. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>