linux-toradex.git/include/linux/usb.h, branch v2.6.29

USB: add kernel-doc for wusb_dev in struct usb_device

2009-01-28T00:15:36+00:00

Reported by Randy Dunlap from a warning on the v2.6.29 merge window.

Signed-off-by: Inaky Perez-Gonzalez 
Cc: David Vrabel 
Cc: Randy Dunlap 
Signed-off-by: Greg Kroah-Hartman

USB: remove info() macro from usb.h

2009-01-07T18:00:14+00:00

USB should not be having it's own printk macros, so remove info() and
use the system-wide standard of dev_info() wherever possible.

No one in the tree is using the macro, so it can now be removed.

Signed-off-by: Greg Kroah-Hartman

USB: remove warn() macro from usb.h

2009-01-07T18:00:14+00:00

USB should not be having it's own printk macros, so remove warn() and
use the system-wide standard of dev_warn() wherever possible.  In the
few places that will not work out, use a basic printk().

Now that all in-tree users are gone, remove the macro.

Signed-off-by: Greg Kroah-Hartman

USB: extension of anchor API to unpoison an anchor

2009-01-07T18:00:11+00:00

This extension allows unpoisoning an anchor allowing drivers that
resubmit URBs to reuse an anchor for methods like resume()

Signed-off-by: Oliver Neukum 
Signed-off-by: Greg Kroah-Hartman

USB: mark "reject" field of struct urb as atomic_t

2009-01-07T18:00:08+00:00

It is enough to protect accesses to reject field of urb
by marking it as atomic_t,also it is the only reason of
existence of usb_reject_lock,so remove the lock to make
code more clean.

Signed-off-by: Ming Lei 
Acked-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: utilize the bus notifiers

2009-01-07T18:00:08+00:00

This patch (as1185) makes usbcore take advantage of the bus
notifications sent out by the driver core.  Now we can create all our
device and interface attribute files before the device or interface
uevent is broadcast.

A side effect is that we no longer create the endpoint "pseudo"
devices at the same time as a device or interface is registered -- it
seems like a bad idea to try registering an endpoint before the
registration of its parent is complete.  So the routines for creating
and removing endpoint devices have been split out and renamed, and
they are called explicitly when needed.  A new bitflag is used for
keeping track of whether or not the interface's endpoint devices have
been created, since (just as with the interface attributes) they vary
with the altsetting and hence can be changed at random times.

Signed-off-by: Alan Stern 
Cc: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman

USB: Enhance usage of pm_message_t

2009-01-07T18:00:03+00:00

This patch (as1177) modifies the USB core suspend and resume
routines.  The resume functions now will take a pm_message_t argument,
so they will know what sort of resume is occurring.  The new argument
is also passed to the port suspend/resume and bus suspend/resume
routines (although they don't use it for anything but debugging).

In addition, special pm_message_t values are used for user-initiated,
device-initiated (i.e., remote wakeup), and automatic suspend/resume.
By testing these values, drivers can tell whether or not a particular
suspend was an autosuspend.  Unfortunately, they can't do the same for
resumes -- not until the pm_message_t argument is also passed to the
drivers' resume methods.  That will require a bigger change.

IMO, the whole Power Management framework should have been set up this
way in the first place.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: Allow usbmon as a module even if usbcore is builtin

2009-01-07T17:59:54+00:00

usbmon can only be built as a module if usbcore is a module too. Trivial
changes to the relevant Kconfig and Makefile (and a few trivial changes
elsewhere) allow usbmon to be built as a module even if usbcore is
builtin.

This is verified to work in all 9 permutations (3 correctly prohibited
by Kconfig, 6 build a suitable result).

Signed-off-by: Paul Bolle 
Signed-off-by: Pete Zaitcev 
Signed-off-by: Greg Kroah-Hartman

USB: Introduce usb_queue_reset() to do resets from atomic contexts

2009-01-07T17:59:53+00:00

This patch introduces a new call to be able to do a USB reset from an
atomic contect. This is quite helpful in USB callbacks to handle
errors (when the only thing that can be done is to do a device
reset).

It is done queuing a work struct that will do the actual reset. The
struct is "attached" to an interface so pending requests from an
interface are removed when said interface is unbound from the driver.

The call flow then becomes:

usb_queue_reset_device()
  __usb_queue_reset_device() [workqueue]
    usb_reset_device()

usb_probe_interface()
  usb_cancel_queue_reset()      [error path]

usb_unbind_interface()
  usb_cancel_queue_reset()

usb_driver_release_interface()
  usb_cancel_queue_reset()

Note usb_cancel_queue_reset() needs smarts to try not to unqueue when
it is actually being executed. This happens when we run the reset from
the workqueue: usb_reset_device() is called and on interface unbind
time, usb_cancel_queue_reset() would be called. That would deadlock on
cancel_work_sync(). To avoid that, we set (before running
usb_reset_device()) usb_intf->reset_running and clear it inmediately
after returning.

Patch is against 2.6.28-rc2 and depends on
http://marc.info/?l=linux-usb&m=122581634925308&w=2 (as submitted by
Alan Stern).

Signed-off-by: Inaky Perez-Gonzalez 
Cc: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: add asynchronous autosuspend/autoresume support

2009-01-07T17:59:53+00:00

This patch (as1160b) adds support routines for asynchronous autosuspend
and autoresume, with accompanying documentation updates.  There
already are several potential users of this interface, and others are
likely to arise as autosuspend support becomes more widespread.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman